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20 September, 10:42

Seawater has a ph of 8.1. what is the concentration of oh-?

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  1. 20 September, 11:58
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    PH scale is used to determine how acidic or basic a solution is.

    pH can be calculated as follows;

    by knowing the ph we can calculate pOH

    pH + pOH = 14

    pOH = 14 - 8.1

    pOH = 5.9

    pOH is used to calculate the hydroxide ion concentration

    pOH = - log[OH⁻]

    [OH⁻] = antilog (-pOH)

    [OH⁻] = 1.26 x 10⁻⁶ M

    therefore hydroxide ion concentration is 1.26 x 10⁻⁶ M
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