Question

what is the purpose of a ph meter?
a it measures the length of an object.
b it measures the acidity of a liquid.
c it measures the temperature of a liquid.
d it measures the mass of an object.
e it measures the volume of a liquid.

Explanation:

A pH meter is a scientific instrument used to determine the hydrogen - ion activity in water - based solutions, which is related to the acidity or basicity of the solution.

Answer:

B. It measures the acidity of a liquid.