Question

a swimming - pool worker wants the pools ph to be 7.2. she comes by to test the water and finds that the ph is 6.2. what should she do to correct this situation?

a. add water.
b. do nothing.
c. add acid.
d. add base.

Explanation:

The pH scale ranges from 0 - 14. A pH of 7 is neutral, less than 7 is acidic, and greater than 7 is basic. The pool water has a pH of 6.2 (acidic) and the desired pH is 7.2 (more basic). To increase the pH, a base should be added as bases can neutralize acids and raise the pH level.

Answer:

D. Add base