Chapter 4, Problem 49E

Interpretation Introduction

Interpretation: The mass of ${\text{Na}}_2{\text{CrO}}_4$ needed to precipitate all silver ions in the solution containing $\text{75}\text{.0}\text{mL}$ of $\text{0}\text{.100}\text{M}{\text{AgNO}}_3$ is to be determined.

Concept introduction: The chemical reaction in which two salts solutions are mixed together and leads to the formation of solid residue is termed as precipitation reaction. The insoluble residue so formed is called precipitate. The precipitate formed in the reaction is in accordance to the exchange of ions between the two salt solutions and thus it is considered as the double displacement reaction.