PH measures the concentration of Hydrogen ions in a substance.

a. True

b False

true

Explanation:

pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

True

Explanation:

if you take p of anything it becomes pSomething. like p of cats is pCats ... p of dogs is pDogs ... therefore here pH is p of hydrogen ions (H is the atomic symbol for hydrogen) and therefore pH does measure concentration of free hydrogen ions in substance.