Compared to a solution with a pH of 7, a solution with a pH of 4 is A) more acidic and has a 1,000-fold increase in [H⁺]. B) more acidic and has a 300-fold increase in [H⁺]. C) more basic and has a 1,000-fold increase in [H⁺]. D) more basic and has a 300-fold increase in [H⁺]. E) more basic and has a 300-fold decrease in [H⁺].

Question

Quizplus · Accepted Answer

A solution with a pH of 4 is more acidic than a solution with a pH of 7, and each pH unit represents a tenfold change in hydrogen ion concentration. Therefore, a decrease of 3 pH units (from 7 to 4) corresponds to a 1,000-fold increase in [H⁺].

Compared to a Solution with a PH of 7, a Solution