Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake? 





A) 10?¹° M
B) 10?4 M
C) 10?7 M
D) 10?¹4 M
E) 10 M






Answer: A


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