Calculate the OH - concentration in each of the following solutions in which the H + concentrations are

a. 3.5 * 10-8 M

b. 0.0065 M

see explanations

Explanation:

Use Kw = [H⁺][OH⁻] = > [OH⁻] = Kw/[H⁺]; Kw = 1.0 x 10⁻¹⁴

a. [OH⁻] = (1.0 x 10⁻¹⁴/3.5 x 10⁻⁸) M = 2.86 x 10⁻⁷M

b. [OH⁻] = (1.0 x 10⁻¹⁴/0.0065) M = 1.54 x 10⁻¹²M