Question

Consider again the titration of HC2H3O2 with NaOH. Let’s say that you need to add 0.0329 moles of NaOH in order for the indicator dye to change color. How many moles of HC2H3O2 must you have had to start?

Answer 1

A:- At equivalence point the number moles of acetic acid (HC2H3O2) is exactly equal to the nuber of moles of sodium hydroxide.

Balanced chemical equation:

HC2H3O2(aq)     +      NaOH(aq)      ----------->    NaC2H3O2(aq)      +   H2O(l)

   1 mole                           1 mole

Hence number of moles of acetic acid, HC2H3O2 = 0.0329 moles