HOSA Dental Terminology Practice

What happens to the pH level when an acid is present?

1. It increases

2. It remains neutral

3. It decreases, indicating acidity

4. It changes to alkaline

The correct answer is: It decreases, indicating acidity

The presence of an acid in a solution lowers the pH level, moving it away from neutrality towards a more acidic range. The pH scale ranges from 0 to 14, with 7 being neutral. Acids have a pH less than 7, and as the concentration of hydrogen ions increases in the solution, the pH level decreases. Thus, when an acid is introduced, it significantly contributes to acidity, resulting in a lower pH value. This understanding is crucial in various fields, including dentistry, where the pH of oral fluids can influence dental health and the integrity of tooth enamel. Maintaining proper pH levels is important in preventing conditions such as tooth decay, where acidic environments can lead to mineral loss from teeth.