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? 4% 10-4 M 10-10 M 104 M 4.0 M

10⁻⁴ M is the hydrogen ion concentration of the lake.

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

pH scale generally runs from 1 to 14 where pH = 7 represents neutral medium, pH 7 represents basic medium.

Given that, pH = 4.0

So,

4.0 = - log [H⁺]

OR,

[H⁺] = antilog (-4) = 10⁻⁴ M

10⁻⁴ M is the hydrogen ion concentration of the lake.