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4 December, 05:45

What is the ph of a 0.0055 m ha (weak acid) solution that is 8.2% ionized?

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  1. 4 December, 06:09
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    Answer is: pH value of weak is 3.35.

    Chemical reaction (dissociation) : HA (aq) → H⁺ (aq) + A⁻ (aq).

    c (HA) = 0.0055 M.

    α = 8.2% : 100% = 0.082.

    [H⁺] = c (HA) · α.

    [H⁺] = 0.0055 M · 0.082.

    [H⁺] = 0.000451 M.

    pH = - log[H⁺].

    pH = - log (0.000451 M).

    pH = 3.35.

    pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity an aqueous solution.
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