A buffer solution was prepared by mixing 0.1M K2HPO2 and 0.1M KH2PO4 (pH 6.64) - calculate...
A buffer solution was prepared by mixing 0.1M K2HPO2 and 0.1M KH2PO4 (pH 6.64) - calculate the ionic strength (I) of the standard phosphate buffer solution
Homework Answers
According to the Henderson-Hasselbulch equation:
pH = pKa + Log[K2HPO4]/[KH2PO4])
i.e. 6.64 = pKa + Log(0.1/0.1)
i.e. pKa = 6.64
i.e. pH = pKa
In the case of pH = pKa, the ionic strength (I) of the buffer solution = 0
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