College Chemistry

Question

What is the pH of 0.75 M hydrochloric acid solution?

Answer 1

Hydrochloric acid is HCl and it is a strong acid meaning it dissociates 100%.

So 1 mole HCl produces 1 mole H⁺ and 1 mole Cl^- (HCl <==> H⁺ + Cl^-)

pH is defined as the negative log of [H+], so all we have to do is find [H+], take the -log and that's the pH.

[H⁺] = 0.75 M

-log 0.75 = 0.12

pH = 0.12