Question

How does the pH of a solution relate to its acidity?

A. The lower the pH, the higher the acidity
B. The lower the pH, the lower the acidity
C. The higher the pH, the higher the acidity
D. The pH of a solution has nothing to do with the acidity of the solution

Answer 1

The pH of a solution is inversely related to its acidity; the lower the pH, the higher the acidity of the solution. A. The lower the pH, the higher the acidity

Step-by-step explanation:

The acidity of a solution is directly related to its pH value. The pH of a solution can be understood as the negative logarithm of the hydrogen-ion concentration. A solution with a higher concentration of hydronium (H3O+) ions than pure water will have a pH value lower than 7 and is considered acidic.

The relation between pH and acidity is such that as the concentration of hydronium ions increases, the pH value decreases, indicating a higher level of acidity. Therefore, the correct answer to how the pH of a solution relates to its acidity is A: The lower the pH, the higher the acidity. This can be observed in acidic substances like vinegar, which have a sour taste and a low pH.