Question

As a solution becomes more acidic, what happens to its pH? Why?

a) pH increases; increased concentration of hydronium ions
b) pH decreases; increased concentration of hydroxide ions
c) pH increases; increased concentration of hydroxide ions
d) pH decreases; increased concentration of hydronium ions

Answer 1

The pH of a solution decreases as it becomes more acidic due to an increased concentration of hydronium ions (H3O+).

Step-by-step explanation:

The pH of a solution decreases as it becomes more acidic. An acidic solution has a higher concentration of hydronium ions (H3O+) compared to pure water, which leads to a decrease in pH. As the concentration of hydronium ions increases, the pH value decreases. For example, vinegar is an acidic solution with a low pH.