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28 November, 20:21

The ph of a 0.013m weak monoprotic acid solution is 5.27. calculate ka for this acid

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  1. 28 November, 20:49
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    Given:

    pH is 5.27

    Concentration of sol'n 0.013m (weak monoprotic)

    Determine H + concentration:

    [H+] = 10^-pH

    = 10^-5.27

    = 5.37x10^-6

    Ka = [H+] [A-] / [HA]

    = (5.37x10^-6) * (5.37x10^-6) / (0.013 - 5.37x10^-6)

    = 2.22x10^-9
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