Chapter 16, Problem 16.116AP

Interpretation Introduction

Interpretation: The reason for the increase in the ratio of ${\text{HPO}}_{\text{4}}{}^{2-}/{\text{PO}}_{\text{4}}{}^{3-}$ on addition of calcium chloride to the buffer is to be stated.

Concept introduction: Calcium ion reacts with hydrogen phosphate and phosphate to form calcium hydrogen phosphate and calcium phosphate, respectively.

To determine: The reason for the increase in the ratio of ${\text{HPO}}_{\text{4}}{}^{2-}/{\text{PO}}_{\text{4}}{}^{3-}$ on addition of calcium chloride to the buffer.