What is the molarity of a sample of phosphoric acid if 15.00 ml of 2 M #KOH# was required to titrate 12 ml of the #H_3PO_4# sample?
Of course, there is a catch.............
This one is not so straightforward, and requires specialist knowledge.
It is a fact that phosphoric acid is a DIACID in aqueous solution, and reaches a stoichiometric endpoint at
And thus moles of
And thus the equivalent quantity of
Remember what I said with regard to the acid-base behaviour of phosphoric acid. It is NOT a triacid..........and you might win brownie points from your prof if you know this fact.