A change of one pH unit represents a ten-fold increase or decrease in hydroxyl ion concentration.

Question

Quizplus · Accepted Answer

This is known as the pH scale and is logarithmic, meaning that a change of one pH unit corresponds to a ten-fold change in hydrogen ion concentration. Therefore, a decrease in pH by one unit represents a ten-fold increase in hydrogen ion concentration, while an increase in pH by one unit represents a ten-fold decrease in hydrogen ion concentration.

A Change of One PH Unit Represents a Ten-Fold Increase