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

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





A) 4.0 M
B) 10?¹° M
C) 10?4 M
D) 104 M
E) 4%





Answer: C


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