Your one of the few who is wearing gloves while working with Nitric acid. Brave man. Gloves burst into flames when in contact with nitric acid. Who knows, you might get more views that way.

@perrygershin3946

Жыл бұрын

Thank you for the warning. It wasn't bravery but ignorance. Fortunately I did not spill any on my gloves. Since I made that video I had learned about the problem with the acid and the gloves. I am going to pin this comment so hopefully others that might watch this video will be aware of the possible danger.

@mspalien

Жыл бұрын

@@perrygershin3946 Actually gloves only burst into flames with fuming nitric acid. The 25% solution you have shouldn't attack them very quickly.

@perrygershin3946

Жыл бұрын

@@mspalien Thanks for the comment Mark. By a strange coincidence I recently watched a KZread video and someone was handling fuming nitric acid with gloves that looked a lot like mine. kzread.info/dash/bejne/g5ZtyJeucq6wmMo.html The time of interest in the video is at 2:20. My guess is that the person handling the acid was very well educated and knew what they were doing. They looked like an expert rather than a hobbyist like myself.

@nicholaschristodoulou5766

Жыл бұрын

Dont knock the man the amount "chemists" on youtube who don't ware gloves when handling chemicals is scary The possible harm your doing to yourself by not bothering with the most mundane precautions are very real, not just at the time but decades down the road ! Gloves ,mask,glasses always at the very least .dont be one of the stupid ones , save yourself cancer's kidney disease and many more illnesses from now and the future

@davidquinn7657

Жыл бұрын

@bertosterberg - thanks for the safety information, it is helpful but would be more effective without the snarkiness and with clearer facts. You are correct that wearing NITRAL gloves is not effective with very concentrated nitric acid. I think the “ burst into flames” comment lacks supporting data, however, fuming nitric acid will create holes in nitral gloves and by the time you get the gloves off, you’ll likely end up with a burn on your hand that looks like you hand was on fire 🔥. However, I don’t want to leave tho impression that you shouldn’t wear any gloves when working with nitric acid. You need to wear the appropriate PPE. When working with nitric acid because it is very dangerous in concentrated form. Not “ouch, that stings” kind of dangerous” can, within seconds become “ I’m sorry sir but we are going to need to amputate that part of your body, dangerous”. So BY ALL MEANS WAER GLOVES, JUST NOT NITRIL GLOVES, because the nitric gloves will not protect you from the acid. WEAR LATEX OR BUTAL RUBBER GLOVES WHEN WORKING WITH Nitric. Acid. See the following from a professional source…. Nitrile gloves are generally resistant to many chemicals and are commonly used in laboratory and industrial settings. However, they are not recommended when working with nitric acid because nitric acid can quickly permeate nitrile gloves, leading to a chemical reaction that causes the gloves to break down and become permeable to the acid. This can happen in a matter of seconds, which means that removing the gloves may not be enough to prevent exposure to the acid. When nitrile gloves come into contact with nitric acid, the acid can cause the nitrile material to swell and break down, forming small holes or tears that allow the acid to reach the skin. Once the gloves have been compromised, removing them may not be enough to prevent exposure, as the acid can still be present on the skin and continue to cause damage. Additionally, nitric acid is a highly corrosive and dangerous substance that can cause severe burns and other injuries. Even brief exposure to nitric acid can result in serious harm, including burns to the skin, eyes, and respiratory system. Therefore, it is essential to use appropriate personal protective equipment (PPE) when working with nitric acid, such as gloves made of butyl rubber or neoprene, which are more resistant to nitric acid. In summary, nitrile gloves are not recommended when working with nitric acid because they can quickly become permeable to the acid, and the resulting damage can occur within seconds. Therefore, it is essential to use appropriate PPE that is resistant to nitric acid to protect yourself from harm.

You have given a great example of why distillation is the preference method. Far less waste. Much higher yield and a far higher concentration of end product. I can use potassium nitrate and 99% Sulfuriccavid and produce 99.2%-99.7% nitric acid. Keeping the glass wear light shielded it has very low NoX. Running air bubbler with the air running thru a desiccant tube to a bubbler at the bottom of a graduated cylinder full of the red fuming HNO3 my end product is 99.7% white fuming nitric acid. Kept in double walled ptfe or my glass container in my lab frig it holds its purity for many months with extremely low rate decomp.

One of the coolest videos on youtube, it just has that something, beautifully done.

Thanks for posting this video and showing this method. Dealing with calcium sulfate is kind of a pain. My opinion, distillation method is better approach to making concentrated nitric acid.

Good video. Show the stoichiometry calculation using the picket fence methods. explain or show how the units are canceled out. The way you have shown the calculations and multiplying and dividing the numbers my confuse the beginner on how that's done or why. The picket fence method is an easy way to show how the units are set up and cancelled arriving at the desired unit to grams of chemicals needed.

فكره ممتازه وصدق في إيصال المعلومه الى الآخرين لذلك قررت الاشتراك في هذه القناة

I found this video again without realizing I had watched it before. I thought what a fantastic video and I learned so much. Then when I was about to write a comment low and behold I already commented 2 years ago. I'm still wondering why I didn't tell Perry what a precious video he did. I guess I was too much nerdy to even notice. Anyway, the question I have now (2 years later) is about the concentration table at 24:41. I would have loved to see you do a cross verification using perhaps sodium carbonate to neutralize the acid and check how much it is required. I'm not sure how I would calculate it but Perry is much smarter than me and I believe most of you guys are that as well. Please share how you would do this. Much appreciated.

Great video man definitely unique on youtube using this method! Could you do this exactly the same way but instead of adding all the sulfuric acid quickly could you add some and filter it off and add more and filter it off again and so on til its done? I did this with ammonium sulfate and calcium chloride and I didn't lose as much water as I did when I just added all of it at once. I wasn't sure this would really make a difference here though. I dont have a vacuum filter so I did this to make it easier for me even though it was annoying.

Very interesting approach. For amateurs, there is a better method I think though. In a vaccum flask mix HCl, KNO3 and Copper, this will produce nitrogen dioxide, it will lead through a tube ended with a pippete, to a cooled cylinder with 30% hydrogen peroxide. The concentration will be definetly low, 30% or slightly above, but no need to use impure sulfuric acid drain cleaners, so the product is a lot more pure, and some of the water can be boiled off to get concentrations closer to the aseotrope. If you have access to a really pure source of H2SO4, this is superior.

@perrygershin3946

2 жыл бұрын

Brytol, thank you very much for giving another option for making KNO3. I'm sure that others that read your comment will appreciate the option.

@dolorescunningam9262

Жыл бұрын

Very nice. But distillation is not a problem, so it is easy to make 95% fuming nitric acid from household items, as shown by model Aspen Angel in this fun tutorial: kzread.info/dash/bejne/gHx2prqtnprWmqQ.html

@dolorescunningam9262

Жыл бұрын

@@perrygershin3946 Your sulfuric acid is clearly contaminated, as it should be transparent. You can easily purify it and concentrate it to 98% by boiling it. All the contaminants will boil off before the sulfuric acid does, and you will get clean transparent 98% acid. See here: kzread.info/dash/bejne/dJxkx7uphrSZnLQ.html

Thank you, man. Great. Good job.

If you are in the USA, depending on local availability, you may wish to switch over to "Rooto" brand drain cleaner sulfuric acid. It's very clear and is also 93% concentration or better.

Can this also be done with sodium nitrate or potassium nitrate using this method?

@perrygershin3946

10 ай бұрын

Sorry, but no. The sulfate produced by this reaction must be insoluble so it will precipitate out of solution. Sodium and potassium sulfates are soluble so they will not precipitate.

Great video Perry, I’ve noticed it’s been a while since you uploaded, I hope your well, and would like to say that your chemistry skills are required for people as I’ve noticed people are looking to save money on certain chemicals and the fact that some are very difficult to get, taking up your hobby again would be a good idea 👌

@perrygershin3946

2 жыл бұрын

Hi Amac. Yes I am doing good these days. I did have some trouble a little over a year ago. I had a battle with pancreatitis. It seems it's not a good idea to supplement anxiety medication with alcohol. I might do more videos if I come up with any good ideas that i can actually do. A large part of the motivation for doing these videos is to repay and thank everyone on KZread for all of the great free content that can be found here. I have also noticed, and it's a little disappointing, that others that were posting a lot of chemistry videos have slowed or stopped posting any new ones. I'm glad you liked my videos. thanks, bye.

@Amac-uz9hm

2 жыл бұрын

Hi Perry, Thanks for the reply 👍 I’m sorry to hear of your challenges and I hope all is as well as can be, alcohol isn’t good with anything😊 although I do tipple myself 🥴😁 It was great to see you do the nitric without distillation, and I might of seen a comment stating their preference of the latter but the equipment is a lot of money when all your trying to do is acquire nitric for precious metals but it’s so difficult to buy of late. I do agree with you on the repetitive videos but hey ho, and KZread has changed its spots lately so I use other platforms but I come back here for chemical and PGM recovery videos I’m following you so I will keep an eye out for upcoming videos Take it easy and good to talk 👍 Oh and another thing Perry is that chart you have for concentrations of any acid??? If so it would be nice to have a copy as I have brick cleaner(hcl) that I have no idea of it’s concentration as well as others, like I have 1.5 gallon of sulfuric acid that requires distillation and only know it’s about 30% at present Thanks in advance

Is that Joanlab hotplate stirrer any good? I've been hunting another good hotplate stirrer because I've only got one that both heats and stirs lol. I'm interested in it's max temp and how fast it gets there, stirring strength, etc. Great video also! It was very clever to take advantage of calcium sulfate's insolubility.

@BackYardScience2000

2 жыл бұрын

They are pretty nice, actually. I can't remember the max temp, but I'm thinking around 300°c? Not quite hot enough to distill sulfuric acid, but close. The stirring is pretty good too. Though it doesn't go extremely fast, but who needs extremely fast stirring anyways? I think it hits around 2,000rpm? But don't quote me on that, or any of this actually. Hahaha! I do own and use one, but I don't use it as much as I do the others I have. I'll show you some of my hotplates that I have on discord later today (1/20/22, in case you don't see this right away.). I have like 8 or 10 of them.

Ive rememberd Nobel made his nitric acid with Sodiumnitrate and Sulfuric acid and used freezing to remove the now insulubel NaHSO4.

@chlorhendl4304

2 жыл бұрын

How exactly did He do it? Can you give me a Recepe ?

@Preyhawk81

2 жыл бұрын

@@chlorhendl4304 found it. Translated throught google.If you are in 3 1/2 weight thieilen sulfuric acid of 1.83 spec. Weight (more or less) 1 by weight of saltpeteric potash or baking soda dissolves, so when cooled salts from the chemical formula (KO, 4 SO³ + 6HO); NaO, 4SO³ + 6NO).These salts are almost insoluble in the acid at a temperature of 0° and can be easily separated from them by means of a press or by the air pressure. A mixture of sulfuric acid and nitric acid is then left behind, which is very suitable for the preparation of nitroglycerin.If one now takes so much sulfuric acid that it is completely absorbed in the excreting salts mentioned above, one obtains without distillation free monohydrate of nitric acid (NO⁵, HO).

@DashVT

2 ай бұрын

​@@Preyhawk81would you mind sharing the original source? Thanks

@Preyhawk81

25 күн бұрын

@@DashVT it is from an patent of nobel from the year 1865 i cant post the links :( but he and others made it with mixing and cooling it to 0C the Potassiumhydrogensulfate freezes out and with decanting they made sulfuric nitric mix or if pure nitric acid. This way you have concentrated near pure chemicals without destillation. Ein Säuregemisch, welches zur Darstellung des Nitroglycerins sehr geeignet ist, wird nach Nobel erhalten, wenn man in 3 1/2 Theilen Schwefelsäure von 1,83 spec. Gew. 1 Theil Kalisalpeter löst und abkühlt. Es krystallisirt dann ein Salz aus, welches aus einem Aequivalent Kali, vier Aequivalenten Schwefelsäure und sechs Aequivalenten Wasser besteht, also von der Formel KO + 4 SO³ + 6 HO. Jene Säure scheidet beim Abkühlen auf 0° fast die ganze Menge des gebildeten Salzes aus und kann von letzterem durch vorsichtiges Abgießen befreit werden. Tropft man einer solchen Säure Glycerin zu, so geht sehr rasch die oben erwähnte Bildung des eigentlichen Sprengöls vor sich, welches durch Wasser abgeschieden und gewaschen das Trinitroglycerin darstellt, von der Zusammensetzung C³ H⁵ O², NO⁴2 NO⁴ O⁴

@Preyhawk81

25 күн бұрын

@@DashVT Ein Säuregemisch, welches zur Darstellung des Nitroglycerins sehr geeignet ist, wird nach Nobel erhalten, wenn man in 3 1/2 Theilen Schwefelsäure von 1,83 spec. Gew. 1 Theil Kalisalpeter löst und abkühlt. Es krystallisirt dann ein Salz aus, welches aus einem Aequivalent Kali, vier Aequivalenten Schwefelsäure und sechs Aequivalenten Wasser besteht, also von der Formel KO + 4 SO³ + 6 HO. Jene Säure scheidet beim Abkühlen auf 0° fast die ganze Menge des gebildeten Salzes aus und kann von letzterem durch vorsichtiges Abgießen befreit werden. Tropft man einer solchen Säure Glycerin zu, so geht sehr rasch die oben erwähnte Bildung des eigentlichen Sprengöls vor sich, welches durch Wasser abgeschieden und gewaschen das Trinitroglycerin darstellt, von der Zusammensetzung C³ H⁵ O², NO⁴2 NO⁴ O⁴ From the Chemical Technical journal and the first one is from an patent from nobel in the year 1865

Why did the copper not react vigorously in the hot nitric acid?

Wow this is great! Thank you!

It’s a lot of work for a small amount of HNO3 but if you don’t have the means to do a distillation this method could come in handy.

Very nice, thank-you!

How's it possible that you made a hole in the filter paper? Drop the contents in and switch the pump on.

Any idea what is the colorant in the sulfuric acid?

Why didn't you weigh the beaker before you put in the calicum nitrate to dry out?

@Sniperboy5551

Жыл бұрын

I was wondering the same thing

14:08 I had that exact same vacuum pump, and it worked great, until one day it wouldn't pull a vacuum very well. I opened it up and saw that it was basically a diaphragm pump, but the diaphragm wasn't made out of anything that was very inert, like teflon. It was just a crappy plastic, and the two rubber "valves" or seals that let the gas in/out were super small and made out of a rubber that also wasn't too inert. So be careful what you put through that. I tried to fix mine, but no amount of super glue or love could get it working again... damn thing.

@perrygershin3946

3 жыл бұрын

Thanks for your reply. To me the pump looks just like an aquarium pump that has the input and output reversed.

@BackYardScience2000

2 жыл бұрын

@@perrygershin3946 you can always run your vacuum through a drying tube or something to neutralize anything that you expect to go through it before it gets to the pump. That would help save it for quite a bit longer and help with longevity. That, and it would help with fumes as well, helping to remove and neutralize them before they reached the pump, which could possibly destroy the seals if not removed, and keep them from entering your work space. Helping to make it safer all around.

what is this used for ???

Good job.

+Perry Gershin If know something about, what plastics are compatible to store dilute nitric acid?

@perrygershin3946

5 жыл бұрын

Plastics like polypropylene LDPE are resistant to dilute nitric acid. I keep my acid in glass containers. Often glass containers for the acids are coated with a resistant plastic so that in case the bottles are dropped ...they do NOT shatter.

@chemicalmaster3267

5 жыл бұрын

@@perrygershin3946 I asked this because I´m thinking about making my own dilute nitric acid and I know that nitric acid, specially when concentrated, reacts with some plastics and I want avoid "melting" a plastic container for storage.

@chemicalmaster3267

4 жыл бұрын

@@perrygershin3946 Does calcium sulfate even react with anything? I was wondering if it could be turned into something else.

@Ryan-lu9km

3 жыл бұрын

@@chemicalmaster3267 Calcium sulfate can be used for making plaster.

Wouldn't the cloudy substance be culcium? As it is insoluble in water

Could this be done with potassium nitrate

Can copper nitrate be used for an electrolyte? I have been seeing a fellow use something blue like that.

@perrygershin3946

4 жыл бұрын

An electrolyte is a chemical compound that dissociates into ions and hence is capable of transporting electric charge. Copper nitrate meets this requirement so yes it can be used as an electrolyte. Copper sulfate has the same appearance in solution and is probably used as an electrolyte more often. It all depends on what you are trying to do.

@light_yajami_6832

4 жыл бұрын

Probably trying to reverse electroplate

Can u do a video on silver with that form. I want to process silver

@perrygershin3946

5 жыл бұрын

Hi, first let me say thank you for your interest in my video. I do not have any formal education in chemistry, I just do this as a hobby. I'm sorry to say that I am not familiar with how the acid is used to process silver. I can say that it will have some contamination of calcium sulfate, possibly up to 2 grams per liter. Trace amounts of sulfuric acid and calcium nitrate may also be present. I don't know if this would interfere with your process.

@markhamilton7310

4 жыл бұрын

Excellent presentation! Thank You very much!

@GeoffBosco

4 жыл бұрын

Check out Sreetips my dude.

Can you use potassium nitrate instead of calcium nitrate? Can you make it more concentrated by putting it on heat to evaporate the water?

@BackYardScience2000

2 жыл бұрын

Yes, you can. By using potassium nitrate and only sulfuric acid, you can make red fuming nitric acid, which can be up to 99% pure. You distill it at 83°c(ish) and the closer you get to the boiling point of water the lower the concentration of the acid and the more water you'll have in your acid. This method is a lot more work in the end than with a distillation, but you don't need a distillation setup, either. You can use a glass Buchner filter though and vacuum off the liquid and not have to worry about ripping or dissolving a filter. The main advantages of having a higher concentration is it takes up far less room, you can always dilute it to whatever percentage that you may need and you have a high concentration for whenever you may need it. It all really comes down to starting costs and availability. 24/40 distillation setups are cheap. 19/32 even cheaper at under $75. But a glass buchner funnel and vacuum pump would set you back over $100. So having all of this equipment would be best, especially considering that you can pull a vacuum on the distillation setup itself and distill at far lower temperatures, have less decomposition due to less heat and higher yields in the process. So yeah, you can use potassium nitrate and sulfuric acid to get nearly pure nitric acid that you can dilute to any concentration for use in pretty much anything that calls for it and with the mentioned equipment you could churn out gallons of it a day.... If you had that kind of time and resources. Lol!

So if you get the precipitate off the filter paper is it nitrated enough to be flash paper

@buggsy5

6 ай бұрын

Probably not at the nitric acid concentration he obtained.

A little bit more expensive - but theoretically can I also replace calcium nitrate with silver nitrate?

@GrimStarr

3 жыл бұрын

Usually potassium or sodium nitrate is used but i guess technically you could do this with any nitrate salt.

@KallePihlajasaari

Жыл бұрын

The price would normally prohibit the choice.

22:25 I looked this up out of curiosity, and it seems the _grade_ system for filter paper pore size is pretty... sporadic, to say the least. The sizes are all over the place: Grade 1: 11μm pore size Grade 2: 8μm Grade 3: 6μm Grade 4: 20~25μm Grade 602h: 2μm So, as you can see, it's not even safe to assume that the pore sizes get smaller as you move up in grade size (or bigger). Whoever came up with this grade system for filter paper pore size needs to get beat up... lol Source: en.wikipedia.org/wiki/Filter_paper#Grade_3

@perrygershin3946

3 жыл бұрын

Yes, that's interesting. Thanks for doing that bit of research. I was assuming the higher grade numbers indicated smaller sizes when I was doing the experiment.

@Unmannedair

2 жыл бұрын

That would be because the grade system is legacy based on traditions... I hate doing things just because of tradition. I find myself re-standardizing most of my parts and processes just for the sake of my own sanity.

@jhyland87

2 жыл бұрын

@@Unmannedair yes, that's also why the US still uses the damn imperial units, despite them being objectively crappier.

Ice on the watchglass will help condense vapors before they escape, helping the process and preventing loss

How many percentage of nitric acid??? Plz reply Sr

Don't play the music. Just continue the experiment with out the music!

25% concentration is not strong enough. I need 68% conc.

does this work with 38% H2SO4 ?

@perrygershin3946

4 жыл бұрын

Yes, with your acid for every gram of calcium nitrate you have you would use 0.5977 / 0.38 = 1.573 grams of H2SO4.

Either have sulfuric acid or calcium nitrate impurities in here nitric acid. That's why it's yellow. Both of those are miscible and would make it through your funnel. It's just due to tolerances in your measuring capacity. It's completely unavoidable in this reaction. Oxalic acid works better because it's less miscible and thus easier to separate from the nitric acid. In addition, any dissolved oxalate can be polymerized with additives to get that to precipitate out of the nitric after filtering.

HNO3 looks like pretty useful stuff.

Is there a way (or indeed any reason) to increase the concentration of your 25% nitric acid? Enjoying your videos, thanks, keep them coming.

@perrygershin3946

5 жыл бұрын

The nitric acid can be purified and concentrated by distillation. Some reactions require more concentrated acid such as this one which produces guncotton. kzread.info/dash/bejne/g4Vp05uAYc-uhcY.html I have never made guncotton myself but I have distilled nitric acid. It's easy to find KZread videos where it is done. One disadvantage of the concentrated acid is that it more easily produces the dangerous nitrogen dioxide gas.

@andrewclark4781

5 жыл бұрын

@@perrygershin3946 I see. Thank you. Would you consider filming the process of distilling your 25% nitric acid and, additionally, exploring other methods available to the home chemist of determining the acid's molarity and % concentration?

@jtbmetaldesigns

Жыл бұрын

I would add that if your uses for nitric acid involve refining sterling silver scrap, making a bright dip for aluminum before anodizing, making metal patinas or related processes, a 25% nitric acid will be adequate. Bright aluminum dips are typically 5% concentration.

Can you concentrate your HNO3 up to 35% with some evaporation?

@grzlbr

Жыл бұрын

Yes !

Yeah hey! what is the point of making acidic gypsum anyway?

@EdwardTriesToScience

4 жыл бұрын

No, Calcium nitrate reacts with sulfuric acid to make nitric acid and calcium sulfate, the cakcium sulfate is filtered out and the nitric acud passes through and you have relatively clean nitric acid.

@mastertechnician3372

3 жыл бұрын

To patch the hole in drywall

What's that ticker tape sound in the audio?

@perrygershin3946

3 ай бұрын

That sound is probably my laundry in the dryer.. My setup is in my basement.

Nitrile gloves and nitric acid seems like a fun combination.

concentrated sulfuric acid + nitrate salt, DCM extraction boil off DCM and collect WFNA

I’m not sure whether *_specific gravity_* (density) will indicate the percentage concentration of H2SO4. That is only valid if the only other ingredient is pure water. Otherwise, you would need to know what the other ingredient was and what its specific gravity is.

Nice video Can use battery liquid instead of conc sulphoric

Hi Perry. nice video. I've tried to find the table to determine its strength without luck. could you send a link where i can get it please.

@perrygershin3946

4 жыл бұрын

i.postimg.cc/d3c4rQ3X/Nitric-Acid-Density-Table.png

@drmarine1771

4 жыл бұрын

Thank you have a great new year.

Great video. Im confused however… the video only has 95K views, but 395K likes? Impressive but very weird.

@perrygershin3946

10 ай бұрын

HI, I just checked and I see 92K views and 1.4k likes. I have no answer to why you see so many likes. Thank you for your interest in my video.

@simontillson482

8 ай бұрын

@@perrygershin3946 Yep. i found the reason. It’s a bug in the iOS KZread app. It sometimes shows the likes count for a previous video you watched, rather than the current one. Just one of many bugs… their developers just don’t seem to care about these bugs, because apparently they’ve been there for years with no fix.

So cool

I was thinking about how ti filter goopy stuff and pretty much gave up. Then I thought...why not do the reaction in 50 ml plastic centrifuge tubes...then spin it down in 4 tubes at a time?

@perrygershin3946

11 ай бұрын

It sounds reasonable. Unfortunately i cannot try that because I don't have a centrifuge. If you try it let everyone know if it works.

what the percentage of the nictric from this procedure.

@mastertechnician3372

3 жыл бұрын

22%

bubbling de-miniralized h20 through sulphur powder best results for your needs......maybe....tanks for sharing

so you dried it thoroughly only to pour the rinse water in it? Why didn't you just weigh the empty one and then use that one? Just sayin'

You have a new subscriber and I wonder if you would consider making a video on how to make a gold electroplating solution that doesn't use cyanide and ideally one that would make use of a dissolving anode donor instead of impregnated solution only but using alloyed karat gold anywhere between 10k and 18k or anything close to that as long as it's not 24k that to me just looks fake because real gold jewelry is never made out of 24 karat gold as it's just too soft to be practical and anybody who's paying even a little bit of attention can immediately tell the difference due to the color

I ve made the same process with oxalic acid. It works i used 500g Ca(NO3)2 in 1liter water and 260g oxalic acid. The filtering was an pain. It had an concentration of 10%.

@Preyhawk81

3 ай бұрын

Better 500g Ca(NO3)2 in 500ml boiling water and 300g oxalic acid in 300ml boiling water under stiring and outside. Oxalic acid water vapors aerosole are nasty. with Vakuumfiltration i could suck out 800ml Water/acid.

If you heat up calsium nitrate it gives out NOx. Why not absorb that in water to create nitric acid?

@perrygershin3946

4 жыл бұрын

I think the method you describe would work. I was hoping this method would be a way to produce nitric acid without generating a lot of the dangerous nitrogen oxides. I could have done better by cooling everything down with ice perhaps. As you probably saw in the video there was some NOx generated when I added the sulfuric acid because of the heating. I'm sure you are aware the problem with the method I used does leave some contamination in the acid even if you get the stoichiometry exact as calcium sulfate is slightly soluble.

@nattsurfaren

4 жыл бұрын

@@perrygershin3946 About the issue you're describing I saw someone doing this in vacuum distillation to reduce the NOx

@orion8981

4 жыл бұрын

At that point, you might as well distill it from sulfuric acid and the nitrate flavor of your choosing. Working with solids and liquids is generally less of a pain in the ass than gasses, from a practical standpoint, and you'll end up with a much better yield.

@nattsurfaren

4 жыл бұрын

@@orion8981 That I can believe but wouldn't you loose sulfuric acid in the process? What is the cheapest way to get similar yields?

@orion8981

4 жыл бұрын

@@nattsurfaren Sulfuric acid is as cheap as precursors come. You're inevitably going to lose the acid in the production since it's a reactant, not a catalyst. The nitric acid is the expensive stuff you're after.

Can I just use calcium nitrate like is available on amazon? Or is that not pure enough?

@perrygershin3946

2 жыл бұрын

The calcium nitrate from amazon should work just fine for this method. It depends on your requirements for the usage of the final product, nitric acid, as to whether or not it will be "pure enough". If high purity is required then distillation is probably your only option. With my method you are bound to have some impurity in the nitric acid even if the starting chemicals are 100% pure. That is because it will be impossible to measure the amounts of each reactant with exact precision Any error will leave a small amount one or the other of the starting chemicals as an impurity in the final product.

@Zeke-id2bo

2 жыл бұрын

@@perrygershin3946 I see. How high of a purity do you think you could get without nitric acid? Bolling sulfuric is a bit daunting lol

@perrygershin3946

2 жыл бұрын

@@Zeke-id2bo You would not be boiling the sulfuric acid, you would boil the impure nitric acid. The boiling point of HNO3 is 83 degrees C.

1. Calculating H2SO4 via density would only be accurate if it was just H2SO4 + H2O. Drain cleaner H2SO4 also contains organic components that are intended to prevent pipes from being attacked and they usually have a high density. In addition, dyes are usually added. The calculated concentration cannot therefore be correct. 2. I can only warn everyone not to use not purified drain cleaner H2SO4. The organic inhibitors contained therein can be nitrated by the resulting HNO3. As long as you don't know exactly which inhibitors are contained, it can be an explosive surprise.

Anyone whose tried to filter a thick suspension of precipitated Calcium sulfate will tell you to avoid this at all costs.

@BackYardScience2000

2 жыл бұрын

It's basically drywall mud....

Where can I get your percentage values table

@perrygershin3946

Жыл бұрын

It has been some time so I don't remember where I got the table I used. After some searching I was able to find this. www.handymath.com/cgi-bin/nitrictble2.cgi?submit=Entry I believe it will give you what you want.

@nurudeenmusah8734

Жыл бұрын

@@perrygershin3946 thanks bro

Make Dilute Nitric acid without distillation is more correct.

If you use saltpetre, potassium nitrate, and add it to already hot sulfuric acid it makes crystals which is easier to filter, my question is, once I have the sulfuric/ nitric acid will the sulfuric acid interfere while dissolving silver? I got the potassium nitrate off of Amazon one day delivery, 20$ for one pound, I like the way the acid in my boiling flask looks, but I wonder if the nitric/ sulfuric acid will still dissolve oz to lbs of silver?

@perrygershin3946

4 жыл бұрын

The reaction you describe will produce a lot of potassium bisulfate which forms the crystals that you see but because it is fairly soluble in water there will still be a fair amount of the bisulfate left in solution. The advantage of using calcium nitrate is that the reaction produces calcium sulfate/bisulfate which has very low solubility so most of it can be filtered out. Another advantage is that the reaction will run at room temperature which is a lot safer and does not produce much of the dangerous nitrogen dioxide gas. I expect the acid produced by your method would dissolve silver but if you care about the purity of your product you will be disappointed. The nitric acid will form silver nitrate but any sulfuric acid will then react with the silver nitrate to make silver sulfate/bisulfate and more nitric acid. The potassium bisulfate may also get into the reaction as well. When the sulfuric acid and potassium bisulfate are depleted then the nitric acid will be used up last. What you are likely to end up with is a mixture of silver sulfate/bisulfate, silver nitrate, and the potassium is going to be in there somewhere as well. Distillation to get clean nitric acid is probably the only solution that will work if you are looking for a pure product. Amazon sells a very inexpensive distillation kit that does the job. www.amazon.com/Chemistry-Glassware-Distilling-distillation-Apparatus/dp/B016HEKEGW/ref=sr_1_7?keywords=distillation+glassware+kit&qid=1566357284&s=industrial&sr=1-7 I have used this one myself. 1 gram of nitric acid will dissolve 0.856 grams of silver.

@roywhipple7340

4 жыл бұрын

@@perrygershin3946thank you very much. That was better than a chemistry class. I'll try out the methods and get back to you, and on the subject it also helps if you know the product I'm tryin to dissolve I gathered some mud from the side of the street where the cars park, tried dissolving it all a few different ways and took my precipitate into a precious metals place which analyzed it at 18% silver 5% cadmium,1% palladium and 20% iron and I have a few lbs of it I'm trying to either dissolve off all the base metals, or dissolve the silver and cement it out with copper, either way I need nitric acid, so there's silver on them streets :-)

@roywhipple7340

4 жыл бұрын

Perry Gershin, I used the nitric acid I made to dissolve some meterial I suspect has gold in it I used nitric acid and muriatic acid, then I put sodium hydroxide in, and it all turned black, but nothing is really settling to the bottom, do I need more sodium hydroxide or should I try something else?

@tinsoffish1810

3 жыл бұрын

@@roywhipple7340 was someones degraded silver plate spoon in there🤔

I would probably try the capillary filtration method rather than a direct filtration.

you never calculated your yield, which I expected since you went to the trouble of calculating your expected yield.

@tomzwinkels6940

3 жыл бұрын

His yield by my observation is 89.76%

Aren’t those gloves dangerous

I LOVE seeing chemists using gravimetric measurements for liquids :D I'm not sure how often this is taught but I never see it used, despite it being easier and more accurate (assuming one uses a calibrated balance).

New sub here. Cool video. Cool hobby. Looking forward to watching your other videos. Be safe.👍

Perry Those gloves look like NITRILE gloves. They could catch fire when exposed to nitric acid

@perrygershin3946

2 жыл бұрын

Thank you for your comment. I did not know that about the gloves.

Ok I'm sure someone has commented on the fact that the Calcium nitrate was dried, then the beaker was cleaned out with liquid, and poured back into the rest the Calcium nitrate. What was the point of drying it?

@perrygershin3946

3 ай бұрын

I dried the calcium nitrate so I could get an accurate weight. This value was required to do the calculation for the amount of sulfuric acid I would need to balance the reaction without an excess if either starting ingredient. Once the dry weight was known it no longer mattered if there was water mixed with it. One mistake I made is that I should have weighed the empty beaker first. That's why I had to remove it all from the beaker so I could weigh it empty.

@trinitro5968

3 ай бұрын

@@perrygershin3946 Aah ok! Have you made any higher concentration like the aseotrope of it, or red fuming, by distillation?

@perrygershin3946

3 ай бұрын

@@trinitro5968 No, because it's rather nasty stuff I'll wait until I need it in higher concentration or purity.

Fortunately for me if it's a 68% nitric acid solution that I want it's not necessary to synthesize it myself since it's completely legal in South Australia to buy small amounts of 68 % nitric acid online (single containers of a capacity of no more than 5 liters). However fuming nitric acid particularly white fuming nitric acid is probably much more tightly controlled than 68 % nitric acid in South Australia because white fuming nitric acid is significantly more dangerous than 68% nitric acid so there may be legal restrictions on white fuming nitric acid in South Australia.

@buggsy5

6 ай бұрын

The primary reason for the nitric acid restrictions is that nitric acid is a primary component for most high explosives. There are a number of ways to purify gold without the use of aqua regia.

how increase percentage?

@perrygershin3946

4 жыл бұрын

The percentage is very much dependent upon the amount of water you use to perform the reaction. Using less water gives higher percentage acid but it becomes much more difficult to filter out the precipitate. The yield will also likely suffer because of more acid remaining in the precipitate. If you have a vacuum filter setup with a strong vacuum you can probably do with less water. My vacuum is not very strong. Also, I probably should have used a little more water for the initial reaction (maybe about 50 mL more) then I would not have had to add extra when I did the filtration. The best method would be to use a distillation setup to obtain azeotropic nitric acid (68%). The point of this video was to show how you could obtain nitric acid without distillation. The major downside is weaker acid and it has a small amount of impurity.

@qwerty_____146

4 жыл бұрын

@@perrygershin3946 Thanks. God bless you and all humans about coronavirus. Amen Amen Amen.

@qwerty_____146

4 жыл бұрын

@@perrygershin3946 We can again distillation the last product(25%)?

@perrygershin3946

4 жыл бұрын

@@qwerty_____146 Yes, but if you have distillation equipment there are easier ways to make nitric acid. kzread.info/dash/bejne/fXaZ0Zqnp9qYYco.html

What is the persistent periodic scratching sound in the background of this video? Sounds like someone scratching two heavy rocks together. I scoured the video trying to find the source 🤣🤣

Idia is good but vedio is very long please demonstrate only content

LOL why did you spend hours drying and then dump distilled water into it?

@ut000bs

3 жыл бұрын

Like he said, to get a dry weight. Otherwise part of your "yield" is nothing but water.

@burtreynolds3143

Жыл бұрын

I was wondering the same thing but I guess, like @ut000bs says he only wanted an accurate weight but didn't really need it to be dry for the experiment. Thanks for answering.

25% Nitric acid with a little bit of Sulphuric acid contamination. I prefer no contamination of sulphuric acid in my Nitric acid.

Going to slowly add the sulfuric acid, 2 droppers later, fuck it.

Johnny was a chemist Johnney is no more What Johnny thought was H2O Was H2SO4

Wow! Like and sub in +. Thanks.

That Calcium Sulfate looks really annoying to run through a filter it looks like you need a sunflower seed press -- LOL

you might try the dry method suggested in this video kzread.info/dash/bejne/daWu1Laxo8u1iLA.html

You could have purified the h2so4! Damn it's not that hard! Look at that cough syrup, you would have a better grade and pure hno3.

Kindly make video on preparing potassium peroxymonopersulfate

nitric acid will be too dirty

@perrygershin3946

Жыл бұрын

It may or may not be too dirty depending on what you are going to use the acid for. There are other videos showing different ways to make nitric acid. This video shows an alternative and maybe easier method to make it . So now the hobby chemist has another method to choose from.

@grzlbr

Жыл бұрын

@@perrygershin3946 This method is the only way i can make it, the nitric works great, i filter the {calcium nitrate} solution because mine comes from the hardware store.

@perrygershin3946

Жыл бұрын

@@grzlbr Thanks for the comment. The main reason I made this video is to offer an alternate method that does not require distillation. Nitric acid is really 'bad ass' and I don't like the idea of heating it up until it boils. Also, you may not have the necessary apparatus to do that method. It's not absolutely pure but for many applications it works well enough. I'm glad to hear it worked for you.

Why in the world do most of there gold recovery videos contain background hard rock music????. How about a nice opera or the sound of a running stream.

Haven't finished watching your video yet, but will in a moment. Very interesting so far. I just have to add that you made a mistake. It is supposed to be 62.86 multiplied by 0.93 and not divided. I noticed this because I was expecting a lower amount at the end, but you got a higher amount. It hit me almost immediately, what the mistake was. Sorry if I am posting this after someone has already mentioned it. I've only read the first comment, before writing this comment. Silly mistakes happen, I still believe that you are a lot smarter than me. Not just saying, it's a true statement, because you know the rest of what I am still about to learn when I return to the video. Thanks for your video, friend:)

@perrygershin3946

Жыл бұрын

I think you are referring to the amount of sulfuric acid required to balance the reaction. The acid I am using is less than 100 % concentration so I will need more of the dilute acid not less. I believe the way I calculated it is correct.

@grzlbr

11 ай бұрын

Quentin you have made a mistake on your math.

Your concentration will be higher if you don't use water.

It’s good to see a real chemist do a reaction

In my opinion these processes require the strong basic chemistry acknowledgement... Even though you said that "you did not have any formal education in chemistry" !? You succeeded.

this is stupid, backwords way way of making nitric acid. u get bad yield, a low percentage of contaminated nitric acid with a lot of work.

This is got to be the silliest ass method of trying to recover nitric acid from a nitrate self that I've ever seen in my life

@perrygershin3946

4 жыл бұрын

Do you know of another method that does not require distillation? I think we would all like to know about it.

@ClownWhisper

4 жыл бұрын

@@perrygershin3946 I know but this is not a viable way to get any kind of reasonable amount of nitric acid dumping random amounts of water quick nitrate salt with crappy dirty sewer cleaner is that going to accomplished anything reasonable. But I'm sorry I don't really mean to be mean but the process shown here is absolutely silly

@perrygershin3946

4 жыл бұрын

@@ClownWhisper So you don't have a better method to get nitric acid without distillation. Why do you say it's not a reasonable ammount? If you need more just do a larger batch. Obviously if you have pure sulfuric acid you can use it. Don't assume just because the drain cleaner acid has some dye in it that it's dirty. The reason for the dye is so it will not be mistaken for something else like plain water. There is no reason the amount of water you use has to be 'random'. Find the amount that works best for the filter setup that you use. If you have a strong vacuum pump you can use less water than if you have a weak pump like mine or none at all. It may or may not be silly depending upon your intended use of the acid.

@karmicmessenger

4 жыл бұрын

@@perrygershin3946 I've been making it for years with calcium ammonium nitrate. dissolve, decant, filter, crystallize, mix with sulphuric acid and voila; I can process my silver. You chose the absolute worst possible nitrate to work with. It was painful to watch.

@eldonjanzen9822

2 жыл бұрын

I appreciate this video because I've always wondered how to make that your gas to precipitation methods.

Your math @ 8:50 doesn't really tell anyone anything other than your "shorthand" that you calculated - showing charts and doing your own calculations for this is dangerous, if your not properly showing the "actual" steps- id say to others...proceed with caution, he is on his own- this is "his" experiment and math, do not duplicate

@perrygershin3946

2 жыл бұрын

Yes this is my experiment. I got the result that I expected. Are you saying that the equation that I presented is wrong? If so how did you determine that it is wrong? I could not find anyone that had done this specific reaction before. What option did I have other than do the calculations myself? I do know how to balance a chemical equation. The whole point of doing an experiment is to determine if your idea works or not. I am not here to teach a complete course in chemistry, That would take more time than I am willing to do. It is not difficult to find videos that go into much more detail explaining chemical reactions.

Warning: I like your videos, but I noticed that you are wearing Nitrile Gloves. A few drops of Nitric Acid will dissolve the gloves and set them on fire. Using Vinyl Gloves is better.

@perrygershin3946

11 ай бұрын

Yes, others have pointed this out as well. Hopefully anyone that repeats my method will read the comments first.

Mix 150g of kno3 and 100g of destil. Water when it disolve mix it with 150mil of h2so4 and let it cool to room temp after that put it in freezer ald wrap it in plastic bag(all in glass that you combined it in) after 4h minimum remove from freezer and filter it thats easiest method You need to heat it up to work

What a waste...

I couldn't get passed the filtering process, I'm out - please be safer than you've been....

@perrygershin3946

2 жыл бұрын

This comment isn't of much use to anyone unless you mention what it is that is unsafe. It has been pointed out to me that the gloves that I am wearing are not protection against nitric acid. Is this what you are referring to?

Please translate into Arabic

That’s weak