Chapter 15, Problem 78QAP

Interpretation Introduction

Interpretation:

The equilibrium constant, K for the following reaction needs to be calculated

${\text{Cd(NH}}_{\text{3}}{\text{)}}_{\text{4}}^{\text{2+}}{\text{(aq) + 4H}}^{\text{+}}{\text{(aq) + 2F}}^{\text{-}}\text{(aq)}\rightleftharpoons {\text{CdF}}_{\text{2}}{\text{(s) + 4NH}}_{\text{4}}^{\text{+}}\text{(aq)}$

Concept introduction:

1. The equilibrium constant(K) for a given reaction is a parameter which is expressed as the ratio of concentration of the products to that of the reactants.
2. For reactions with multiple equilibria, the K for the overall reaction is a product of the equilibrium constants of the individual steps.
3. Solubility product (K_sp ) is essentially an equilibrium constant which depicts the relation between a solid and its ions in an aqueous solution. K_sp is expressed as a product of the concentration or the molar solubility of the dissolved ions.