Very helpful. I missed a week containing the lecture over Gravimetric Analysis and Titrations in my Chemistry class. This made things much clearer! Please come be my professor! :-(

man i wish u were my chemistry professor

wait, so its just stoichiometry? man i was tripping thinking i missed something..

@xdxdsheep

3 жыл бұрын

Always has been

@senny-

7 ай бұрын

Same

This was very helpful and easy to understand. Thanks so much for uploading this Professor Dave!!!

This very much cleared up the foggy mess of my brain with regards to gravimetry :) always a fun time to learn when you really understand what's being taught to you. Thank you agaaaiiinnnn Professor Dave!!!!!

such a clear explanation! Thanks a lot !!!

thanks chemistry jesus, I was stuck for a while on this topic

This was really helpful, Thank You!

Thanx dr Dave we all appreciate it ♥️

this is just a matter of stoichiometry, just take note of the whole chemical reaction then ur good. stoich works with titration problem as well for me

Thanks it was very helpful

thank you！So helpful！

THANK YOUUUU SOOOO MUCH SIR!!!

I just learn that I have to learn more. Just catched 10%. Nice video to study, Thanks.

Thx that was a good help☺️

Thanks so much. you have solved the exact problem in my handout, I failed to solve it

Thank you

Better than my university lecturer.

should've used different coefficents on stuff like the SO_4 to illustrate that concept

thank you chemistry daddy

what i am trying to do is apply this method to an experiment. all the info that I have are from that experiment but there are two acids applied to the ferrous sulfite substance, hydrochloric acid and nitric acid. what should I do?

Please I need more calculations on gravimetric of qualitative analysis of inorganic mixtures for pharmacy please

Thnks

sir suggested book for promblem of gravimetry

This was soooo helpful, thank you! Now if only my data will cooperate with me 😭😭😭

Here in the Netherlands, you gain no points whenever your write something like CaSO4 (aq). Spectator ions should never be used in reactions and ions are seperated in solution! Furthermore, nice videos! Keep on going!

@ProfessorDaveExplains

5 жыл бұрын

It's not a net ionic equation, calcium sulfate must be written because we are doing stoichiometry to figure out the initial mass of it that was in the solid mixture.

@EntropicalNature

5 жыл бұрын

Of course I realize that in order to know the initial mass you need to know the molar mass of CaSO4 and that you were not doing a net ionic equation. I just want to prevent misconceptions from happening. For example, you could describe the precipitation reaction as Ba2+ + SO4 2- -> BaSO4 and then deduce (since the source of Barium ions is in surplus) that the sulfate ions are the limiting factor. Then from the process of dissolving calciumsulfate you can and should determine the eventual stoichiometry. Being a science teacher I cannot stand people who write for example NaCl (aq), since we all know there is no such thing. So there's another way of explaining it, is all I'm saying. I understand your reasoning for presenting the matter in this way, but it should be explicitly stated that said notation is chemically incorrect. I hope I don't offend you, since I'm really in love with the work you're doing! I'm even learning Italian because of you!! (yet, I still don't know why...)

1:06 where did Ca(No³)² came from

Hello from India..thank you for solution I have different solution. Gravimetric factor=Formula wt of analyte/formula wt of ppt X mole of analyte/mol of ppt =136.14/233.38=0.5833 Weight of analyte=Gravimetric Factor X wt of ppt =0.5833 X 0.6168 =0.3597g Percent content=0.3597/0.4550*100 =79.05%

@r0yce

2 жыл бұрын

It's the same solution. Your Gravimetric factor came from a similar process. That equation was derived just like in the video. But helps to do quick maths in the exams I guess. :D

Is there a lecture for this? I couldn't find one despite using the search function on the channel

@ProfessorDaveExplains

9 ай бұрын

actually no i never did a tutorial on this

@saii221

9 ай бұрын

@@ProfessorDaveExplains Oh that's okay then. I just assumed all practice problems had tutorials related to them and I figured I'd watch it too but this video is still helpful on its own so thank you

that opanic when he want when youre ready give it a try when i dont know whta to do huhuhuhuh

Where did you get the 136.14g?

@meripoghosyan2981

Жыл бұрын

it's the molar mass of CaSO4 40(Ca)+96(SO4)=136

at 3:16 where did u get 0.4550

@husbaansayed1697

4 жыл бұрын

i mean why do use that value?

@ProfessorDaveExplains

4 жыл бұрын

initial mass of the sample, given information at the start

Bro IDK what I did wrong on Khan Academy's example problem with no video cuz it said I was wrong then I came here to see how to do it and I did literally the same steps as this video... I must have messed up my arithmetic somewhere or rounded wrong or something.

@saramirc8916

4 жыл бұрын

haha no its just a wack problem :/

Here noe

help ∫eˣln(x)dx

@EntropicalNature

5 жыл бұрын

I think nobody can help you neang, since no analytical solutions exist to this integral. Just two short comments: 1. why are you posting this as a reply to this (chemical) video? 2. if you really want an approximate solution: just use the Taylor expansion of e^x and then use integration by parts.... Good luck!

@neangmeyhang5813

5 жыл бұрын

sorry

waste of time..

Change your name to JESUS CHEMISTRY