The molar concentration of hydroxide ion in pure water at 25 °C is ________.

Name: The molar concentration of hydroxide ion in pure water at 25 °C is ________.
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Quizplus · Accepted Answer

At 25 °C, the product of the concentrations of hydrogen ions [H+] and hydroxide ions [OH-] in pure water is 1.0 × 10^-14 (the ion product constant for water, Kw). Since pure water is neutral, [H+] = [OH-], so both are equal to the square root of Kw, which is 1.0 × 10^-7 M.

The Molar Concentration of Hydroxide Ion in Pure Water at 25