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?
1 answer:
Answer:
[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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