# Chem

Compared with a pH of 7, a solution of
pH 5 has what times/fraction of the hydrogen
concentration?
1. 1/100
2. nearly the same concentration
3. twice
4.5/7
5. 100 times

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1. pH = -log(H^+).
Since the pH is a log function, the H^+ from 1 pH to the next (either higher or lower) is in steps of 10. That is pH = 2 is 10x weaker than a pH of 1 and 10x stronger than a pH of 3

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posted by DrBob222

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