January 2018 NY Regents Chemistry Exam
48 When the concentration of hydrogen ions in a solution is decreased by a factor of ten, the pH of the solution (1) increases by 1
(2) increases by 10
(3) decreases by 1
(4) decreases by 10
Solution: As the concentration of hydrogen ions decreases, pH increases (solution becomes more basic)! Each 1 pH unit is equal to a factor of 10.
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