Question

The equation for the pH of a substance is pH = -log[H+], where H+ is the concentration of hydrogen ions. What is the approximate pH of a solution whose hydrogen ion concentration is 2x 10⁹?

a.1.0
b.2.9
c.8.7
d.9.3

Answer 1

The approximate pH of a solution with a hydrogen ion concentration of 2x10⁹ is approximately 9.3.

Step-by-step explanation:

The pH of a solution can be found by taking the negative log of the [H+], so: pH = -log(2x10⁹) = -log(2) - log(10⁹) ≈ -0.301 - 9 = -9.301. Therefore, the approximate pH of a solution with a hydrogen ion concentration of 2x10⁹ is approximately 9.3.