Wishes from NIT,Nagpur! You're doing a good job. Thank you so much!

@MicroChemsExperiments

3 жыл бұрын

It's my pleasure. Keep supporting us.

Can you explain where is 20.394 from?

Your all of video is very essential

@MicroChemsExperiments

3 жыл бұрын

Thank you so much. Keep supporting us.

Nice video

This was helpful. Thank you, It Worked.

@MicroChemsExperiments

9 ай бұрын

You're welcome!

It's too helpful for us thanku☺

@MicroChemsExperiments

2 жыл бұрын

You are welcome

Hello, this method is still valuable if we use anhydrous sodium thiosulfate instead of penhydrated sodium thiosulfate ? and if it's yes, in this case the preperation of thiosulfate sodium expected molarity will be 0.158 g in 10 ml is it right ?

@MicroChemsExperiments

2 жыл бұрын

Yes. You are correct.

Hello, I have one question, why after I adding the starch the blue-black color of solvent become pale yellow not colourless?

@MorganJones-cn8wk

6 ай бұрын

I would also like to know!

Nice vedio

@MicroChemsExperiments

3 жыл бұрын

Thank you

Where is that 20.something coming from on the formulae

In some videos I have seen that a pinch of Na2CO3 is also put in the solution. What is the purpose of Na2CO3?

@MicroChemsExperiments

3 жыл бұрын

Addition of Na2CO3 helps to trigger the decomposition of thiosulfate. But if you dont use, it will not cause any major problm in your experiment.

What is 20.394? Please explain..

0.1 N = 0.01N ( for determine PV) is that same???

thanks dear 👍

@MicroChemsExperiments

Жыл бұрын

You are welcome

Time stamp: Step-01: 0:27 Step-02: 02:24 Step-03: 04:19 Step-04: 07:23 Step-05: 10:14

@MicroChemsExperiments

2 жыл бұрын

Thanks

🙏🏻👍🏻

@MicroChemsExperiments

3 жыл бұрын

Thank you

Superb video👍 Someone video to new fiber content method to use filter paper and without use (muffle furnace).

@MicroChemsExperiments

3 жыл бұрын

Viral Fam, Thank you for your comment. There is no official method of Fiber content determination where filter paper is used & Furnace is not used. Anyways we followed the AOAC method strictly.

How about standardization of 0.005N soudium thiosulphate? The preparation pf potassoim dichromate is still the same? Would the % of potassium iodide solution affect?

@Whiteff_fan

8 ай бұрын

Same

Can we use potato or corn starch??

Like it

@MicroChemsExperiments

2 жыл бұрын

Thank you

What is 20.394 stand for? Please let me know 😢

I am following IP method of preparation and standardization. Here instead of Potassium dichromate, potassium bromate is being used. How to calculate the Factor? The method as per Indian Pharmacopoeia is as follows: "Dissolve 0.200g of potassium bromate, weighed accurately, in sufficient water to produce 250.0 ml. To 50.0 ml of this solution add 2 gm of potassium iodide and 3 ml of 2(M) hydrochloric acid and titrate with 0.1(M) Sodium Thiosulphate solution {Test} using starch solution, added towards the end of the titration, as indicator until the blue color is discharged. 1ml of 0.1(M) sodium Thiosulphate is equivalent to 0.002784g KBrO3." Please help.

@MicroChemsExperiments

Жыл бұрын

No factor is needed. Just follow your last sentence for the calculation (1ml sodium thiosulfate=0.002784g KBrO3.)

is the standardization of sod. thiosulphate crucial to find PV value?

@MicroChemsExperiments

2 жыл бұрын

Yes.

I am having a confusion regarding the end point colour. Does it comes bottle green as in your video or colourless ?

@MicroChemsExperiments

3 жыл бұрын

No no...It will not become colorless. Blue color will be removed completely and Green color will appeare as shown in my video. I followed AOAC method strictly. So don't keep any confusion regarding this procedure.

@prasannamuley1917

3 жыл бұрын

Thank you for your response. Will there be any difference if I add HCl instead of H2SO4 or vice versa?

@MicroChemsExperiments

3 жыл бұрын

@@prasannamuley1917 you have to use HCl as AOAC says to use it. We dont have any other option to replace HCl.

@prasannamuley1917

3 жыл бұрын

Could you please suggest which AOAC volume to refer for analysis ?

@MicroChemsExperiments

3 жыл бұрын

@@prasannamuley1917 Volume 2, 19th edition

Thanks so much

@MicroChemsExperiments

Жыл бұрын

You are welcome

@judiha

Жыл бұрын

@@MicroChemsExperiments Can i use this steps to standardize 0.005N of sodium thiosulfate??

I have one doubt , if the standards used are expired, what is the probability to get the endpoint??? Still we can get the results???

@MicroChemsExperiments

3 жыл бұрын

The potency or purity of a chemical decreases with the increased number of expiry date. Ofcourse it's better to use a chemical withing it's shelf-life. But normally we have seen that: using a chemical, which was expired 1 year past, does not affect significantly in the test result though it varies with the type of test. You can use a expired chemicals after standardization but not in sensitive tests those are done using HPLC, GC, AAS etc. And reference standards should not be used after the expiry date. I think your got my point.

Please make video on phosphorus analysis by chemical methods.. Ammonium molybdate test

@MicroChemsExperiments

3 жыл бұрын

Will try. Thank you.

Free fatty acid defination.

@MicroChemsExperiments

3 жыл бұрын

Free fatty acids (FFA) are produced by the hydrolysis of oils and fats. Since FFA are less stable than neutral oil, they are more prone to oxidation and to turning rancid. Thus, FFA is a key feature linked with the quality and commercial value of oils and fats.

Please make video for Assay of Potassium Chloride, Sodium Bi Carbonate & Assay of Ammonium Bi Carbonate

@MicroChemsExperiments

3 жыл бұрын

Noted. We will work on your mentioned parameter. Stay with us.

Dear medam to please post the to calculate the amount of sulphate present in the given sample.the sample maybe like a water or waste treatment water

@MicroChemsExperiments

2 жыл бұрын

Okay. We will try

What is hypo solution & How to prepare?

@MicroChemsExperiments

2 жыл бұрын

Take help from Google

Pls prepare & standardization of 0.1M EDTA SOLN IN 1000ML VOLUMETRIC FLASK

@MicroChemsExperiments

2 жыл бұрын

Noted

Use for silver testing titration

@MicroChemsExperiments

11 ай бұрын

Your comment is not clear

What's is 20.394?

@MicroChemsExperiments

3 жыл бұрын

It is a calculation factor given by AOAC.

Hi What does the value of 20.394 . represent?

@MicroChemsExperiments

3 жыл бұрын

It is a calculation factor given by AOAC official method.

@alifahimalshalaan9021

3 жыл бұрын

@@MicroChemsExperiments thank you

@alifahimalshalaan9021

3 жыл бұрын

@@MicroChemsExperiments excuse me AOAC?

@MicroChemsExperiments

3 жыл бұрын

@@alifahimalshalaan9021 Yes. AOAC

@alifahimalshalaan9021

3 жыл бұрын

@@MicroChemsExperiments Sorry ; Is this a law or a general rule? Can you get more details?

i love u

@MicroChemsExperiments

5 ай бұрын

Thank you

ቆማላት ዓጋመ። ናይ የካቲት ዓሰርተ ሓደ ሕስቡ። ደቂ ሽራሙጥ። ወያነ ዕንጨቲ ብማዓኾርኩም ሚስ ኣእተዉልኩም፣ ማዓኾርኩም ገፊሑ ሓንጎልኩም ጸቢቡ። ቆማላት ዓጋመ። ስብኡት እንተኼንክን ወይ ንኤርትራ ውይ ን ኣዲስ ኣበባ እተዋ። ደቂ ሽራሙጥ።

0.02 M kmno4 procedure as per IP..how to calculate.... molarity

@MicroChemsExperiments

2 жыл бұрын

Noted.

@PriyankaYadav-lx2ei

2 жыл бұрын

No reply

Why take k2cr2o7 0.16-0.22 gm?.calculation is =48*0.1*25/1000 =0.12 gm

@MicroChemsExperiments

2 жыл бұрын

AOAC said so

What is 20.394 pls tell us

@MicroChemsExperiments

2 жыл бұрын

It is calculation factor given by AOAC METHOD

How to make silver

@MicroChemsExperiments

2 жыл бұрын

It is a natural resource. You can't made it. You can purchase a bowl made of silver and then melt it by heating to collect silver from it.

Mam 5 n HCl standard and preparing

@MicroChemsExperiments

Жыл бұрын

Your question is not clear

Molecular WT of potassium dicromate is. 294.18 than why you have taken. 20.39. Mg

@MicroChemsExperiments

Жыл бұрын

We followed the method of AOAC 993.20 for this preparation and standardisation strictly

20.394 Kya hai

Wonderful video! What is the number 20.394 in the calculation? How to convert to N (normality)? Thanks!

@MicroChemsExperiments

3 жыл бұрын

20.394 is the factor of the equation. In case of sodium thiosulfate, normality and molarity is same. 1M sodium thiosulfate= 1N sodium thiosulfate. So same procedure should be followed to prepare 0.1N solution.

@alifahimalshalaan9021

3 жыл бұрын

@@MicroChemsExperiments 20.394 = ?

@MicroChemsExperiments

3 жыл бұрын

@@alifahimalshalaan9021 It is a calculation factor given by AOAC official method.

@msc.6537

2 жыл бұрын

@@MicroChemsExperiments It's the chemical reactions Stoichiometry: (294.185 g/mol K2CR2O7)*(1 mol K2CR2O7/3mol I2)* (1 mol I2/ 2 mol Na2S2O3)= 49.032 or 0.049032 in AOAC (denominator) or 20.394 if it is in numerator ( 1 mol K2CR2O7/ 294.185 g)

@msc.6537

2 жыл бұрын

@@alifahimalshalaan9021(294.185 g/mol K2CR2O7)*(1 mol K2CR2O7/3mol I2)* (1 mol I2/ 2 mol Na2S2O3)= 49.032 or 0.049032 in AOAC (denominator) or 20.394 if it is in numerator ( 1 mol K2CR2O7/ 294.185 g)

Take24.8 ginstead of 2.48g for 0.1N

@piyushpatel5924

Жыл бұрын

For 1ltr

What is 20.394

@MicroChemsExperiments

2 жыл бұрын

Calculation factor

What is 20.39??

@MicroChemsExperiments

Жыл бұрын

Calculation factor

i need 0.1N

@pampadey4073

7 ай бұрын

0.1N are also includes same procedure

Thßnkß

@MicroChemsExperiments

2 жыл бұрын

You are welcome

20.349?? Pls

@MicroChemsExperiments

Жыл бұрын

It is calculation factor

20،349 from where get

@MicroChemsExperiments

Жыл бұрын

Calculation factor given by AOAC method

@awwadalhazeemy6184

Жыл бұрын

@@MicroChemsExperiments can you explain in video plz

In last Calculation what is 20.394 M1V1=M2V2 Is used so What is Molarity you used in flask Of potassium dichromate.?? How mucht is v2?

@MicroChemsExperiments

2 жыл бұрын

This video is made based on AOAC method. So the calculation and the factor-20.394 are given by AOAC, hence no explanation is available to us. We used 0.169g potassium dichromate to dissolve in 25ml water, as said in AOAC. Molarity of potassium dichromate is not concern here. So calculate the molarity by yourself by using the molecular weight, if you need to know. Thank you

@msc.6537

2 жыл бұрын

It's the chemical reactions Stoichiometry: (294.185 g/mol K2CR2O7)*(1 mol K2CR2O7/3mol I2)* (1 mol I2/ 2 mol Na2S2O3)= 49.032 or 0.049032 in AOAC (denominator) or 20.394 if it is in numerator ( 1 mol K2CR2O7/ 294.185 g) to calculate the M of K2CR2O7 just divide it with the total volume of solution prepared

@MicroChemsExperiments

2 жыл бұрын

@@msc.6537 Thank you for the detailed explanation

What 20.394

@MicroChemsExperiments

3 жыл бұрын

Its a calculation factor given by AOAC

??

@MicroChemsExperiments

Жыл бұрын

Please specify your question

Please H21A/1021/3107/21 NET CONTENT 500 gm 13204 06 K05 57 Ammonium thiocyanate crystals Extrapuré And H21A/1021/3107/21 A Ammonium thiocyanate crystals Extrapuré Ammonium sulphocyanate) (reagent for cobalt & north. PUR NET CONTENT 500 gm Prepration & standardization Details

@MicroChemsExperiments

11 ай бұрын

Your comment is not clear

¿0,1N = 0,1M? I NEED HELP.

@MicroChemsExperiments

2 жыл бұрын

Molarity and Normality is same for sodium thiosulfate.

@uparantkakdodiya3743

8 ай бұрын

No There is difference between normality and molarity!

Mem in sab ki hindi mai pdf sent kra do prepration and standard ki

@MicroChemsExperiments

Жыл бұрын

Sorry we don't have any hindi pdf

15% KI 100ml na 10%KI ___ml

@MicroChemsExperiments

2 жыл бұрын

Plzz calculate by yourself

49.03 is factor not 20.394

@MicroChemsExperiments

Жыл бұрын

What is your Reference?

@amazingfactbyjoy4064

Жыл бұрын

K2Cr2O7 equivalent weight is 49.03

Time stamp: Step-01: 0:27 Step-02: 02:24 Step-03: 04:19 Step-04: 07:23 Step-05: 10:14

@MicroChemsExperiments

2 жыл бұрын

Thanks