Question

What is the pH of a 0.025 M HCl solution?
12.4
1.6
2.5
05

Answer 1

Answer: pH is 1.6

Explanation: Explanation: HCl is strong acid and it protolyzes totally:

HCl + H2O ⇒ H3O+ + Cl-

Concentrations are same: [H3O+] = c(HCl)

pH = - log[H3O+] = - log(0.025) = 1.60