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What is the pH of a saturated solution of magnesium hydroxide?

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at 25 deg C?

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  1. Mg(OH)2 --> Mg+2  & 2OH-

    K = [Mg+2]  [OH-]^2

    1.6e-12 =  [x]  [2x]^2

    4x3 = 1.6e-12

    x3 = 4e-13

    x =  7.4e-5 Molar

    [OH-] = 2x = 14.8e-5

    pOH = 3.83

    14 - pOH = pH =

    your anwswer: 10.17

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