If the hydrogen ion concentration of a solution is increased by a factor of 4, the pH is
A) raised by 4 pH units
B) raised by 0.3 pH units
C) lowered by 2 pH units
D) lowered by 0.6 pH units
E) lowered by 0.25 pH units

Question

Quizplus · Accepted Answer

A change in hydrogen ion concentration of a factor of 4 corresponds to a change of 0.6 in pH units. A decrease in hydrogen ion concentration of a factor of 4 corresponds to an increase of 0.6 in pH units. Therefore, an increase in hydrogen ion concentration of a factor of 4 will result in a decrease of 0.6 pH units. Therefore, the correct answer is D.

If the Hydrogen Ion Concentration of a Solution Is Increased