Question

What effect does the concentration of $H^{+}$ (aq) have on the acidic nature of solution?

Answer 1

The concentration of $H^{+}$ ion determine the acidic nature of the solution and acidity of the solution.

The acidic nature of the solution increases as the concentration of the $H^{+}$ ion increases.

This can be also understood by the equation of $pH$

$pH=-lo{g}_{10}\left[H^{+}\right]$

Here for more acidic solution, the pH value is smaller and the concentration of $H^{+}$ is more.