How do you calculate the pH of a strong acid?

Use pH = −log₁₀[H⁺]. A strong acid dissociates completely, so for a monoprotic acid such as HCl, [H⁺] equals the acid's concentration. For example, 0.010 mol dm⁻³ HCl has a pH of 2.00. To find [H⁺] from a pH value, raise 10 to the power of minus the pH. Give pH to 2 decimal places.