Final answer:
The pH scale is a linear scale that measures the relative amount of acidity or alkalinity.
Step-by-step explanation:
The statement is True. pH is a linear scale that measures the relative amount of acidity or alkalinity. It is based on the concentration of the hydronium (or hydrogen) ion in an aqueous solution. The pH scale ranges from 0 to 14, where a pH value below 7 indicates acidity, a pH value of 7 indicates neutrality, and a pH value above 7 indicates alkalinity.