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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: becchino on May 20, 2016, 02:52:09 AM

Title: Sulfuric Acid Standardization
Post by: becchino on May 20, 2016, 02:52:09 AM

Hi!!
I have a problem... this is the method of Ph.Eu. for Standardization of Acid Sulfuric 0.5 M (1 N):

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fs32.postimg.org%2Fu02onl9vp%2Facid.png&hash=8f408c1820b339b2cbe95446fc3272d43f094724)


could you tell me what is the correct formula?

My ideas i:

Factor Correction =       (Weight NA2CO3 * 1) / (53 x ml)

Title: Re: Sulfuric Acid Standardization
Post by: Arkcon on May 20, 2016, 06:18:48 AM

There is nothing wrong with the factor you've written.  You have said in math language, what was written in words.

Now what.

Will that formula, written by you, match what you have to perform?

Title: Re: Sulfuric Acid Standardization
Post by: becchino on May 20, 2016, 07:05:08 AM

Quote from: Arkcon on May 20, 2016, 06:18:48 AM

There is nothing wrong with the factor you've written.  You have said in math language, what was written in words.

Now what.

Will that formula, written by you, match what you have to perform?

But.... my result is about 9 ml instead 18 ml!!!!

Title: Re: Sulfuric Acid Standardization
Post by: Ben Bob2 on May 20, 2016, 07:35:17 AM

Did you consider that sulfuric acid has two ionizable protons?

Title: Re: Sulfuric Acid Standardization
Post by: becchino on May 20, 2016, 07:38:16 AM

Quote from: Ben Bob2 on May 20, 2016, 07:35:17 AM

Did you consider that sulfuric acid has two ionizable protons?

Ok but.... 1 ml is = to 53 mg... so 1000 mg is = ?

1:53=x:1000

Right??