The concentration of hydroxyl ions in a solution with a $pH$ value of $3$ is .......

When $NaCl$ is dissolved in water,the sodium ion becomes

The ionic product of water increases if....

The concentration of hydrogen ions in a given solution is $6 \times 10^{-4} \ M$. The $pH$ of the solution is:

If the $pH$ of water is less than ......,the water pipes undergo corrosion.

There are two different solutions, $A$ and $B$. The $pH$ of solution $A$ is $4$. Find the $pH$ of solution $B$ having $[H^+]$ concentration three times that of solution $A$.