The Relationship between Buffer Solution pH and its Buffer Capacity

The buffer capacity of buffer solutions with different pH made by the same conjugate acid-base and the same total concentration was studied in the given ΔpH buffer range.The results obtained showed that the buffer capacity of buffer solutions to acid or base were not all maximum at pH=pKa if buffer solutions with different pH made by the same conjugate acid-base had an equal total concentration and buffer ranges ΔpH were proposed