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5 November, 00:31

What is the [OH^+] ina solution that has a pH=4.02

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  1. 5 November, 01:06
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    Answer is: concentration of hydroxide ions [OH⁻] is 1.047·10⁻¹⁰ M.

    pH = 4.02.

    pH = - log[H⁺ ].

    [H⁺] = 10∧ (-pH).

    [H⁺] = 10∧ (-4.02).

    [H⁺] = 9.54·10⁻⁵ M; equilibrium concentration of hydrogen cations.

    [H⁺] · [OH⁻] = 1·10⁻¹⁴ M².

    [OH⁻] = 1·10⁻¹⁴ M² : 9.54·10⁻⁵ M.

    [OH⁻] = 1.047·10⁻¹⁰ M; equilibriom concentration of hydroxide anions.
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