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19 December, 12:48

Write the ka expression for an aqueous solution of nitrous acid:

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  1. 19 December, 13:03
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    Balanced chemical reaction (dissociation) : HNO₂ (aq) ⇄ H⁺ (aq) + NO₂⁻ (aq).

    Answer is: Ka = [NO₂⁻]·[H⁺] / [HNO₂].

    Ka - acid dissociation constant.

    [HNO₂] - equilibrium concentration of nitrous acid.

    [NO₂⁻] - equilibrium concentration of nitrite anions.

    [H⁺] - equilibrium concentration of hydrogen cations.
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