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19 May, 17:27

He hydroxide ion concentration in household ammonia is 3.2 * 10-3 m at 25 °c. what is the concentration of hydronium ions in the solution

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  1. 19 May, 18:26
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    when Kw = [OH-][H3O+],

    and when Kw is the ionic constant for water at 25°C = 1 x 10^-14

    and we have [OH-] = 3.2 x 10^-3

    this the concentration at equilibruim.

    so by substitution:

    1 x 10^-14 = 3.2 x 10^-3 * [H3O+].

    ∴ [H3O] = (1 x 10^-14) / (3.2 x 10^-3)

    = 3.125 x 10^-12 m.

    so, the answer is: concentration of hydronium ions is = 3.125·10⁻¹² M
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