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The Definition of PH Is PH = -Log[H3O+], Where [H3O+]

Question 78

Multiple Choice

The definition of pH is pH = -log[H3O+], where [H3O+] is the hydrogen ion concentration. If [H3O+] = 1.2 x 10-5, the pH, expressed to the correct number of significant figures, is:


A) 4.92
B) 4.9
C) 5.08
D) 5.1

Correct Answer:

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