The ionic product of water $(K_w)$ increases if:

Calculate the $[OH^{-}]$ if $pOH$ of a solution is $4.94$.

At $25\,^oC$,the $pH$ of a solution is $2$. If the $pH$ is doubled,the concentration of hydronium ions in the solution will ............

If the $pH$ of an aqueous solution is $6$,then the concentration of $OH^{-}$ in the solution will be ...............

The $pH$ of a solution is $9.95$. Calculate the $\left[OH^{-}\right]$ concentration.

At $90\,^oC$,pure water has $[H^{+}] = 10^{-6}\,M$. If $100\, mL$ of $0.2\, M\, HCl$ is added to $200\, mL$ of $0.1\, M\, KOH$ at $90\,^oC$,then the $pH$ of the resulting solution will be: