Chapter 17, Problem 17.131SP

Interpretation Introduction

Interpretation:

The reason behind the fact that will precipitate and will not precipitate in qualitative analysis should be identified.

Concept introduction:

Solubility product is equilibrium constant for reactions that occur when an ionic compound is dissolved to produce ions. It is denotedby Consider an ionic compound. Its dissociation occurs as:

The expression for itsis as follows:

A precipitate of an ionic compound will form when solution that contains constituent ion is mixed. The precipitation depends on value of ion product (IP). The IP is defined in the same way as Also, the concentrations in expression for IP are concentration at time t and not equilibrium concentrations. Consider to be an ionic compound. Its dissociation occurs as follows:

The expression for its IP is as follows:

The negative logarithm of molar concentration of hydronium ion is called The expression for pH is as follows:

The relation between and is as follows: