Weak acid

A weak acid is an acid that does not fully ionize in solution; that is, if the acid was represented by the general formula AH, then in aqueous solution a significant amount of undissolved AH still remains.

Related Topics:
Acid - Ionize

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HA(aq) leftrightarrow H+(aq) + A-(aq)

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The equilibrium concentrations of reactants and products are related by the Acidity constant expression, (Ka): Ka = /.

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The greater the value of Ka, the more the formation of H+ is favored, and the lower the pH of the solution.

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The vast majority of acids are weak acids.

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