Question

The concentration of hydrogen ions [H⁺] in a solution is 1.5 × 10⁻³ M. What is the pH of the solution?

A. pH = 3.5
B. pH = 2.5
C. pH = 1.5
D. pH = 4.5

Answer 1

The concentration of hydrogen ions [H⁺] in a solution can be used to determine the pH of the solution. In this case, with a hydrogen ion concentration of 1.5 × 10⁻³ M, the pH of the solution is approximately 2.823.

Step-by-step explanation:

The concentration of hydrogen ions [H⁺] in a solution can be used to determine the pH of the solution. The pH is calculated using the formula pH = -log[H⁺]. In this case, the concentration of hydrogen ions is 1.5 × 10⁻³ M. Plugging this value into the formula, we get pH = -log(1.5 × 10⁻³) ≈ 2.823.

So, the pH of the solution is approximately 2.823. Comparing this value to the given options, we can see that the closest option is B. Therefore, the correct answer is B. pH = 2.5.