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3 July, 21:48

A solution at 25 degrees Celsius is 1.0 * 10-5 M H3O+. What is the concentration of OH - in this solution?

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  1. 3 July, 21:54
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    [OH⁻] = 1.0 x 10⁻⁹ M.

    Explanation:

    ∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

    ∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺] = 10⁻¹⁴ / (1.0 x 10⁻⁵) = 1.0 x 10⁻⁹ M.
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