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13 May, 14:38

In a solution at 25°C, the [H+] is 3.5 * 10-6 M. What is the [OH-]?

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  1. 13 May, 16:09
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    Kw = [ H+] x [ OH-]

    1 x 10⁻¹⁴ = [ 3.5 x 10⁻⁶] x [OH-]

    [OH-] = 1 x 10⁻¹⁴ / 3.5 x 10⁻⁶

    [OH-] = 2.85 x 10⁻⁹ M
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