Preparation & Standardization of 0.1M (0.1N) Sodium Thiosulphate Solutn_Chemical Preparation(Part-3)

[@engineerbanaartist4265]

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

[@MicroChemsExperiments]

It's my pleasure. Keep supporting us.

[@ashfiyadipta]

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

[@MicroChemsExperiments]

Thanks

[@laestetica4148]

Can you explain where is 20.394 from?

[@sabbiralemon3459]

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

[@HafizurRahman-ic9cu]

What is 20.394? Please explain..

[@SohelRana-ln7bg]

Your all of video is very essential

[@MicroChemsExperiments]

Thank you so much. Keep supporting us.

[@MuraliUllamparthi]

0.1M =0.1N is it correct if it is corrected what is n factor of hypo

[@niyomukizaolivier4445]

This was helpful. Thank you, It Worked.

[@MicroChemsExperiments]

You're welcome!

[@sitihajaromar1265]

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

[@MorganJones-cn8wk]

I would also like to know!

[@PaulMoyo-xv5nz]

Where is that 20.something coming from on the formulae

[@manojchouhan8869]

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

[@MicroChemsExperiments]

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.

[@tulamarkad9941]

It's too helpful for us thanku☺

[@MicroChemsExperiments]

You are welcome

[@Foodcompetition12]

Nice video

[@shreepadkoli595]

Why starch filtered before use

[@paramjeetjangra7692]

Can we use potato or corn starch??

[@rashmigohil8130]

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

[@MicroChemsExperiments]

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.

[@mrsteriousz7643]

What is 20.394 stand for? Please let me know 😢

[@rihab.jelassi.nutritionniste]

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]

Yes. You are correct.

[@FlyingDutchman01]

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]

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

[@kapilmaurya8262]

thanks dear 👍

[@MicroChemsExperiments]

You are welcome

[@abrahamtesfai6597]

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።

[@patrickgyamfi3243]

Thanks so much

[@MicroChemsExperiments]

You are welcome

[@judiha]

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

[@md.usufali1806]

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

[@MicroChemsExperiments]

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

[@rajesh24292]

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

[@MicroChemsExperiments]

Will try. Thank you.

[@ssindhumathimathi6599]

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]

Okay. We will try

[@aleenaali2979]

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

[@MicroChemsExperiments]

Yes.

[@nishakumarichauhan1803]

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]

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.

[@szejing69]

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

[@hotsquarrel]

Same

[@udhavmhetre3748]

What is hypo solution & How to prepare?

[@MicroChemsExperiments]

Take help from Google

[@ushasingh9944]

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

[@MicroChemsExperiments]

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

[@prasannamuley1917]

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

[@MicroChemsExperiments]

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]

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

[@MicroChemsExperiments]

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

[@prasannamuley1917]

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

[@MicroChemsExperiments]

@@prasannamuley1917 Volume 2, 19th edition

[@SohelRana-ln7bg]

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

[@MicroChemsExperiments]

AOAC said so

[@PrabhjotSingh-ik2ql]

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

[@MicroChemsExperiments]

Noted

[@mehedihasanrabbi342]

Free fatty acid defination.

[@MicroChemsExperiments]

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.

[@SohelRana-ln7bg]

What's is 20.394?

[@MicroChemsExperiments]

It is a calculation factor given by AOAC.

[@PriyankaYadav-lx2ei]

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

[@MicroChemsExperiments]

Noted.

[@PriyankaYadav-lx2ei]

No reply

[@rayanthabit3489]

Like it

[@MicroChemsExperiments]

Thank you

[@alifahimalshalaan9021]

Hi What does the value of 20.394 . represent?

[@MicroChemsExperiments]

It is a calculation factor given by AOAC official method.

[@alifahimalshalaan9021]

@@MicroChemsExperiments thank you

[@alifahimalshalaan9021]

@@MicroChemsExperiments excuse me AOAC?

[@MicroChemsExperiments]

@@alifahimalshalaan9021 Yes. AOAC

[@alifahimalshalaan9021]

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

[@piyushpatel5924]

Take24.8 ginstead of 2.48g for 0.1N

[@piyushpatel5924]

For 1ltr

[@raj.q.cmanager3958]

20.394 Kya hai

[@vkmixedvloges3059]

What is 20.394 pls tell us

[@MicroChemsExperiments]

It is calculation factor given by AOAC METHOD

[@mahedihasan-fq2oc]

i need 0.1N

[@pampadey4073]

0.1N are also includes same procedure

[@vijayvishwakarma9114]

How to make silver

[@MicroChemsExperiments]

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.

[@arupsarkar525]

Mam 5 n HCl standard and preparing

[@MicroChemsExperiments]

Your question is not clear

[@Abhi-gr7xk]

🙏🏻👍🏻

[@MicroChemsExperiments]

Thank you

[@prasannaamutha]

What is 20.394

[@MicroChemsExperiments]

Calculation factor

[@milenaktec]

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

[@MicroChemsExperiments]

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]

@@MicroChemsExperiments 20.394 = ?

[@MicroChemsExperiments]

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

[@msc.6537]

@@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]

@@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)

[@ezekielpydimetta1598]

20.349?? Pls

[@MicroChemsExperiments]

It is calculation factor

[@awwadalhazeemy6184]

20،349 from where get

[@MicroChemsExperiments]

Calculation factor given by AOAC method

[@awwadalhazeemy6184]

@@MicroChemsExperiments can you explain in video plz

[@abdulmoiz6317]

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]

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]

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]

@@msc.6537 Thank you for the detailed explanation

[@amazingfactbyjoy4064]

49.03 is factor not 20.394

[@MicroChemsExperiments]

What is your Reference?

[@amazingfactbyjoy4064]

K2Cr2O7 equivalent weight is 49.03

[@ElenaPassalacqua]

i love u

[@MicroChemsExperiments]

Thank you

[@titocarrilloc]

¿0,1N = 0,1M? I NEED HELP.

[@MicroChemsExperiments]

Molarity and Normality is same for sodium thiosulfate.

[@uparantkakdodiya3743]

No There is difference between normality and molarity!

[@पहाडीलड़कावगाँव]

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

[@MicroChemsExperiments]

Sorry we don't have any hindi pdf

[@maheshprajapati5515]

What 20.394

[@MicroChemsExperiments]

Its a calculation factor given by AOAC

[@nagaraj.n9807]

15% KI 100ml na 10%KI ___ml

[@MicroChemsExperiments]

Plzz calculate by yourself

[@arupsarkar525]

??

[@MicroChemsExperiments]

Please specify your question

[@manmohanbansal208]

Thßnkß

[@MicroChemsExperiments]

You are welcome

[@ashfiyadipta9646]

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

[@MicroChemsExperiments]

Thanks

[@dhanshripatil9949]

Nice vedio

[@MicroChemsExperiments]

Thank you

[@Kayemey]

What is 20.39??

[@MicroChemsExperiments]

Calculation factor