Chapter 17, Problem 82A

Interpretation Introduction

Interpretation:

The solubility equilibrium equation for the solution of aluminum hydroxide needs to be written along with the solubility product expression.

Concept introduction:

The solubility product of a solute depends on the dissolution equation of the solute.

Answer to Problem 82A

The solubility equilibrium equation:

$Al{(OH)}_3\stackrel{}{\rightleftarrows }A{l}^{3+}(aq)+3O{H}^{-}(aq)$

Solubility equation:

$K_{sp}=[A{l}^{3+}]{[O{H}^{-}]}^3$

Explanation of Solution

Since potassium hydroxide is more soluble than aluminum hydroxide, it increases the amount of hydroxide ions in the solution making the equilibrium shift to the left and reducing the amount of aluminum ions in the solution.

Conclusion

The reason for reduction of aluminum ions and the required equations have been mentioned.