Which one of the following statements about pH is incorrect?
A. An acidic solution has a higher concentration of protons than hydroxide ions.
B. Physiological pH is defined as the pH of pure water, 7.0.
C. Some cellular compartments have different pH values than others.
D. The pH of a solution can range from 0 to 14.
E. A solution of pH 5 has a proton concentration 100 times greater than a solution of pH 7.
Answer: B
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