kalowdip4bi99 kalowdip4bi99 04-11-2019 Chemistry contestada A change of unit on the pH scale represents a 10-fold change in hydronium ion concentration. How much greater is the hydronium ion concentration in a substance with pH 2 than a substance with pH 5? A. 3 times B. 10 times C. 100 times D. 1000 times