Final answer:
A pH value measures the acidity or basicity of a solution. A pH less than 7 is acidic, a pH of 7 is neutral, and a pH greater than 7 is basic.
Step-by-step explanation:
A pH value measures the acidity or basicity of a solution. A solution with a pH less than 7 is acidic, a pH of 7 is neutral, and a pH greater than 7 is basic. Based on the given pH values:
- A pH of 4 is acidic
- A pH of 11 is basic
- A pH of 3.6 is acidic