How is the concentration of hydronium ions
Question.
How is the concentration of hydronium ions $\left(\mathrm{H}_{3} \mathrm{O}^{+}\right)$affected when a solution of an acid is diluted

solution:
When an acid is diluted, the concentration of hydronium ions $\left(\mathrm{H}_{3} \mathrm{O}^{+}\right)$per unit volume decreases.

This means that the strength of the acid decreases.
Editor