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26 February, 05:42

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?

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  1. 26 February, 05:51
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    [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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