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15 April, 01:51

What is the pH of a sample with [OH-] = 2.5 x 10-11 M?

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  1. 15 April, 01:56
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    The pH of the sample is 3,4.

    Explanation:

    We calculate the pOH from the formula pOH = - log (OH-). We know that for all aqueous solutions: pH + pOH = 14, and from there we clear pH:

    pOH = - log (OH-) = 10,60

    pH + pOH = 14

    pH + 10,60 = 14

    pH=14 - 10,60

    pH=3,4
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