Answer:
5.12 moles of hydrochloric acid.
Explanation:
The balanced equation is:
2KMnO4 + 16HCl ---> 2KCL + 2MnCl2 + 5Cl2 + 8H2O
So 2 moles of potassium permanganate reacts with 16 moles of HCl.
So 0.64 moles KMnO4 react with (16/2) * 0.64
= 5.12 moles.
