Chapter U6.119, Problem 1TAI

Interpretation Introduction

Interpretation: The term equilibrium needs to be explained.

Concept introduction: The chemical reaction is represented in the form of an equation in which reactants are written on the left hand side and products on right hand side. The reactants and products are separated by placing an arrow between them.

Explanation of Solution

When a double arrow is placed between reactant and product, the chemical equation is represented as follows:

  $A+B\rightleftarrows AB$

Here, A and B react to form AB and AB can further dissociate to form A and B.

Thus, the reaction is reversible in nature.

For a reversible reaction, equilibrium is a state when both reactants and products have equal concentrations and it does not change with time.

An equilibrium reaction is represented as follows:

  $A+B\rightleftharpoons AB$

At equilibrium, the change in the concentration of A, B is same as change in concentration of AB. For example, if concentration of A and B decreases by x value, the concentration of AB will increase by x .