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31 January, 10:40

the hydroxide ion concentration in a sample of lemon juice is 1.9 x 10^-12 2.28 4.3 5.2 11.72 1.92 X 10^-12

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  1. 31 January, 11:08
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    [OH⁻] = 1.9 * 10⁻¹² M

    Explanation:

    The pH of lemon juice is 2.3. We can calculate the pOH using the following expression.

    pH + pOH = 14

    pOH = 14 - pH

    pOH = 14 - 2.3 = 11.7

    The pOH is 11.7. We can calculate the concentration of the hydroxide ion using its definition.

    pOH = - log [OH⁻]

    - pOH = log [OH⁻]

    [OH⁻] = anti log ( - pOH)

    [OH⁻] = anti log ( - 11.7)

    [OH⁻] = 1.9 * 10⁻¹² M
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