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When [H⁺] = 4

Question 102

Multiple Choice

When [H⁺] = 4.0 *10^-⁹ M in water at 25°C, then ________

A) pH = 9.40.
B) pH = 7.00.
C) pH = -8.40.
D) pH = 8.40.
E) pH = -9.40.

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