If $[H_3O^{+}] = 3.5 \times 10^{-8} \ M$,calculate $[OH^{-}]$ and $pH$ of the solution.

Calculate the $[H_3O^+]$ concentration if the $pH$ of the solution is $4.25$.

At $298 \, K$,the equivalent conductivity of a $0.01 \, M$ solution of aniline hydrochloride is $122.5 \, \Omega^{-1} \, cm^2 \, eq^{-1}$,but in the presence of a sufficient excess of aniline to prevent hydrolysis,it is $106.5 \, \Omega^{-1} \, cm^2 \, eq^{-1}$. The equivalent conductivity of $HCl$ at infinite dilution is $426.0 \, \Omega^{-1} \, cm^2 \, eq^{-1}$. The hydrolysis constant of aniline is:

As the temperature increases,the $pH$ of a $KOH$ solution

The $pH$ of a solution in which the $[H^{+}] = 0.01 \, M$ is

Which of the following will have the highest $pH$?