Which of the following statements about pH is true?

Question

Quizplus · Accepted Answer

An increase in hydrogen ion concentration means there are more acidic ions in a solution. This will lead to a decrease in pH units. Conversely, a decrease in hydrogen ion concentration will lead to a higher pH as the solution becomes more basic. A single unit change on the pH scale actually represents a 10-fold change in hydrogen ion concentration, not a 1% change. Basic pH levels are actually greater than 7, not less than. The pH scale measures hydrogen ion concentration, not oxygen ion concentration.

Which of the Following Statements About PH Is True