Question

The pH of rain water collected from two cities A and B was found to be 6 and 5 respectively. The rain water of which city is more acidic?

Answer 1

pH is the change in the concentration of ${\mathrm{H}}^{+}$ions.

Acid is a substance (molecule or ion) that has a tendency to lose ${\mathrm{H}}^{+}$ions, and it has a pH value between 0-7.

The rainwater from city B is more acidic since the higher the pH value of the solution, the less will be the acidic strength of the solution.

Therefore, city B's rainwater will be more acidic.