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30 March, 11:22

What is the PH of the acid lactic 0,20 M?

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  1. 30 March, 11:24
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    Dissociation constant of lactic acid:

    K=1.38·10⁻⁴

    C=0.20 mol/L

    [H⁺]=√ (KC)

    pH=-lg[H⁺]=-lg{√ (KC) }

    pH=-lg{√ (1.38·10⁻⁴·0.20) }=2.28

    pH=2.28
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