The buffering capacity increases when the concentrations of both acetic acid and acetate are doubled.
A buffer is a solution that mitigates against changes in acidity and alkalinity. A buffer is usually made up a weak acid and its conjugate base or a weak base and its conjugate acid.
The buffering capacity of a buffer increases as the concentration of the concentration of the acid/base as well as its conjugate base/acid increases. Therefore, the buffering capacity increases when the concentrations of both acetic acid and acetate are doubled.
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