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

The $pH$ of a solution is increased from $3$ to $6$. Its ${H^{+}}$ ion concentration will be

The $pH$ of a solution can be expressed as:

What is the normal $pH$ range of human blood?

Which equation represents the $pH$ of a solution?