An aqueous solution of $HCl$ has a $pH$ of $2.0$. When water is added to increase the $pH$ to $5.0$,the hydrogen ion concentration

The $pH$ of a solution is $9.5$. The solution is

For the following Assertion and Reason,the correct option is
Assertion : The $pH$ of water increases with increase in temperature.
Reason : The dissociation of water into $H^{+}$ and $OH^{-}$ is an exothermic reaction.

Explain the $pH$ scale and $pH$.

The $pOH$ at which water is maximum dissociated at $25\,^{\circ}C$ is

The concentration of hydrogen ions in a given solution is $6 \times 10^{-4} \ M$. The $pH$ of the solution is: