If $pOH$ of a solution is $6.0$,then its $pH$ will be

The $pH$ of a soft drink is $3.82$. Its hydrogen ion concentration will be

The $pH$ of a solution is $5.0$. To this solution,sufficient acid is added to decrease the $pH$ to $2.0$. The increase in hydrogen ion concentration is $...$ times.

Find the concentration of hydrogen ions in a solution with $pH = 5.4$ in $mol/L$.

At $90 \, ^\circ C$,the concentration of $[H_3O^+]$ in pure water is $10^{-6} \, mol \, L^{-1}$. What is the value of $K_W$ at $90 \, ^\circ C$?

At $25 \, ^\circ C$,the ionic product of water $(K_w)$ is equal to .......