The ka of hypochlorous acid (hclo) is 3.0 x 10-8 at. what is the % ionization of hypochlorous acid in a 0.015 m aqueous solution of hclo at?

Question

Parker Clements

Chemistry

9 February, 18:30

The ka of hypochlorous acid (hclo) is 3.0 x 10-8 at. what is the % ionization of hypochlorous acid in a 0.015 m aqueous solution of hclo at?

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Johnathan Acevedo · Answer 1

Answer is: the % ionization of hypochlorous acid is 0.14.

Balanced chemical reaction (dissociation) of an aqueous solution of hypochlorous acid:

HClO (aq) ⇄ H⁺ (aq) + ClO⁻ (aq).

Ka = [H⁺] · [ClO⁻] / [HClO].

[H⁺] is equilibrium concentration of hydrogen cations or protons.

[ClO⁻] is equilibrium concentration of hypochlorite anions.

[HClO] is equilibrium concentration of hypochlorous acid.

Ka is the acid dissociation constant.

Ka (HClO) = 3.0·10⁻⁸.

c (HClO) = 0.015 M.

Ka (HClO) = α² · c (HClO).

α = √ (3.0·10⁻⁸ : 0.015).

α = 0.0014 · 100% = 0.14%.