At $25 \, ^\circ C$,the $OH^{-}$ ion concentration in $10^{-5} \, M \, HCl(aq.)$ is......

When an aqueous solution of a strong acid with $pH = 5$ is mixed with an equal volume of an aqueous solution of a strong acid with $pH = 3$,what will be the $pH$ of the resulting solution?

Following four solutions are prepared by mixing different volumes of $NaOH$ and $HCl$ of different concentrations. The $pH$ of which one of them will be equal to $1$?

The ratio of $pH$ of $0.1 \, M \, H_2SO_4$ and that of $0.1 \, N \, H_2SO_4$ is

When $10^{-8} \ mol$ of $HCl$ is dissolved in one litre of water,the $pH$ of the solution will be

Calculate the concentration of hydrogen ions $[H^+]$ in the following solutions: $(a)$ $0.001 \ M \ HNO_3$ $(b)$ $0.0001 \ M \ KOH$.