What is the H3O * lon concentration in an aqueous solution having an OH" concentra of 1.0 x 10-2 M?_ ___ What is the pH?

[H₃O⁺] = 1.0 x 10⁻¹² M

pH = 12

Explanation:

The H₃O⁺ concentration is related to the OH⁻ concentration through the water autoionization constant Kw:

Kw = [H₃O⁺][OH⁻] = 1.0 x 10⁻⁻¹⁴

[H₃O⁺] = (10⁻⁷) / [OH⁻] = (1.0 x 10⁻¹⁴) / (1.0 x 10⁻² M) = 1.0 x 10⁻¹² M

The pH is found using the following equation:

pH = - log ([H₃O⁺]) = - log (1.0 x 10⁻¹²) = 12