Which of the following correctly defines the pH of a solution?

Step-by-step solution

1. Recall that pH measures the acidity of a solution.
2. The definition is $\text{pH}=-{\log }_{10}[{\text{H}}^{+}]$, where $[{\text{H}}^{+}]$ is the molar concentration of hydrogen ions.
3. Therefore the correct statement is option B.

Concept tested: Definition of pH

Published 19 August 2026 · How this solution was prepared and checked