Chapter 22, Problem 28R

To determine

To Choose: The correct option.

Explanation of Solution

Introduction: The concentration of a solution is the amount of acid or base dissolved in the solution.

Equal concentration of $\text{HCl}$ and ${\text{CH}}_3\text{COOH}$ in their respective solution signifies, the amount of $\text{HCl}$ and ${\text{CH}}_3\text{COOH}$ in the respective solutions is equal.Their concentration being same does not signifies that their rate of ionization is also same.

  $\text{HCl}$ is an acid and ${\text{CH}}_3\text{COOH}$ is a base, so they do not have the same pH.

Being an acid and a base, $\text{HCl}$ and ${\text{CH}}_3\text{COOH}$ react differently with metals and make different salts.

Conclusion: Equal concentrations of $\text{HCl}$ and ${\text{CH}}_3\text{COOH}$ do not have the same pH. Option A is correct.