Question

___________increases with the increase in ${\mathrm{H}}^{+}$ ions.

Answer 1

Acid:

1. An acid is a material that in its aqueous solution generates the ionizable hydronium ion (${\mathrm{H}}_3{\mathrm{O}}^{+}$).
2. It causes the blue litmus paper to turn red.
3. The pH range of acid is $0$ to $6.9$.
4. As the concentration of ${\mathrm{H}}^{+}$ ion increases, the pH value decreases, and acidic strength also increases.
5. Examples: Hydrochloric acid, Nitric acid, Sulphuric acid
6. Sulphuric acid is strongest among all acids, its complete dissociation into Hydrogen and Sulphate ions is shown below.

$\underset{\mathrm{Sulphuric}\mathrm{acid}}{{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}\to \underset{\mathrm{Hydrogen}\mathrm{ions}}{2{\mathrm{H}}^{+}\left(\mathrm{aq}\right)}+\underset{\mathrm{Sulphate}\mathrm{ions}}{{{\mathrm{SO}}_4}^{2-}\left(\mathrm{aq}\right)}$

Hence, the Strength of acid increases with the increase in ${\mathrm{H}}^{+}$ ions.