What does a pH value less than 7 indicate?

What does a pH value less than 7 indicate?

• A. An acidic solution.
• B. A basic solution.
• C. Neutral.
• D. No solution.

Answer: (A)

A pH value measures how acidic or basic a solution is by looking at hydrogen ion concentration. A value below 7 means there are more hydrogen ions (H+) than hydroxide ions (OH−), which defines an acidic solution. The lower the pH, the stronger the acidity, since each unit represents a tenfold change in [H+]. For context, lemon juice or vinegar sit in the acidic range, neutral water is around 7, and common baking soda solutions are basic (above 7). So, a pH value less than 7 indicates the solution is acidic.

A pH value measures how acidic or basic a solution is by looking at hydrogen ion concentration. A value below 7 means there are more hydrogen ions (H+) than hydroxide ions (OH−), which defines an acidic solution. The lower the pH, the stronger the acidity, since each unit represents a tenfold change in [H+]. For context, lemon juice or vinegar sit in the acidic range, neutral water is around 7, and common baking soda solutions are basic (above 7). So, a pH value less than 7 indicates the solution is acidic.