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

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