The $pH$ of a solution having $[H^{+}] = 10 \times 10^{-4} \, \text{moles/litre}$ will be

The number of $H^{+}$ ions present in $10 \ mL$ of a solution with $pH = 12$ is ........

The $pH$ of a solution is $2$. If its $pH$ is to be raised to $4$,then the $[H^{+}]$ of the original solution has to be

The $pH$ of a solution is $4$. The hydroxide ion concentration of the solution would be:

What is the dissociation constant of water at $25^{\circ}C$?

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.