At $25^{\circ} C$,the ${H_3}{O^+}$ concentration of a solution is $1.0 \times 10^{-10} \ M$. What is the $pOH$ value of the solution (in $.0$)?

The $pH$ of an aqueous solution having hydroxide ion concentration as $1 \times 10^{-5} \ M$ is

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 $pH$ in the stomach is approximately:

$pH$ of a soft drink is $3.6$. Calculate the concentration of hydrogen ions in it.

The $pH$ of milk,black coffee,tomato juice,lemon juice and egg white are $6.8, 5.0, 4.2, 2.2$ and $7.8$ respectively. Calculate the corresponding hydrogen ion concentration $[H^+]$ in each.