What does it mean for a weak acid to be in equilibrium

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asked Feb 20, 2017 223k views

2 Answers

Andy R · Answer 1 · 2017-02-23T07:12:15+0000

When an uncharged weak acid is added to water, a homogeneous equilibrium forms in which aqueous acid molecules, HA(aq), react with liquid water to form aqueous hydronium ions and aqueous anions, A-(aq). The latter are produced when the acid molecules lose H+ ions to water.

Iamzozo · Answer 2 · 2017-02-26T20:03:29+0000

Weak acid dissociates partially in water to form hydronium ion and conjugate base of the acid. Since the acid is weak the conjugate base is strong. Acetic acid is a weak acid which dissolves in water to form hydronium ion and acetate ions (conjugate base).

CH₃COOH + H₂O → H₃O⁺ + CH₃COO⁻

What does it mean for a weak acid to be in equilibrium

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