The pH of a solution of $\mathrm{H}_2 \mathrm{O}_2$ is 6.0. Some chlorine gas is bubbled into this solution.…
The pH of a solution of $\mathrm{H}_2 \mathrm{O}_2$ is 6.0. Some chlorine gas is bubbled into this solution. Which of the following is correct?
The $\mathrm{pH}$ of resultant solution becomes 8.0
Hydrogen gas is liberated from resultant solution
The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated
$\mathrm{Cl}_2 \mathrm{O}$ is formed in the resultant solution
Solution
$\mathrm{H}_2 \mathrm{O}_2+\mathrm{Cl}_2 \longrightarrow 2 \mathrm{HCl}+\mathrm{O}_2$
$\mathrm{HCl}$ is formed by the reduction of chlorine by $\mathrm{H}_2 \mathrm{O}_2$, hence $\mathrm{pH}$ further decreases.