A change in pH value of one unit indicates a
A) 1-fold change in [H⁺].
B) change of 10⁻¹ in pH.
C) change of 10⁻² in pH.
D) 10 fold change in [H⁺].
E) Cannot be determined.

Question

Quizplus · Accepted Answer

A change in pH value of one unit indicates a 10-fold change in [H⁺]. The pH scale is logarithmic, which means that the pH value changes by a factor of 10 for each unit change. For example, a solution with pH 3 is 10 times more acidic than a solution with pH 4, and 100 times more acidic than a solution with pH 5.

A Change in PH Value of One Unit Indicates a