What is the normality of 2M solution of phosphoric acid of an acid base titration?

1 Answer
anor277
Aug 1, 2018

Approx. #4*mol*L^-1#...

Explanation:

Phosphoric acid acts as a DIACID in aqueous solution. The solution after addition of excess base should be stoichiometric in #HPO_4^(-)#, i.e.

#H_3PO_4(aq) + 2NaOH(aq) rarr Na_2HPO_4(aq) + 2H_2O(l)#

Unless special measures are take only the 2 equiv of protium ion are titratable.

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