Chapter 12, Problem 7CO

Interpretation Introduction

Interpretation:

The method for calculating the equilibrium constant, pH and degree dissociation of weak acids and bases should be explained.

Concept Introduction:

• A system is referred to be in a state of equilibrium if the rate of forward reaction equals the rate of the reverse reaction.
• A system at equilibrium is characterized by the equilibrium constant which depends on the concentrations of the reactants and products.
• In the case of dissociation of weak acids and bases, there is a dynamic equilibrium between the acid (or base) and its constituent ions
• The equilibrium constant is such cases is referred to as the acid dissociation constant K_a or the base dissociation constant K_b