When an acidic solution is diluted, what happens to its pH?

JAMB Chemistry 2023 205 views
Source: JAMB · 2023

When an acidic solution is diluted, what happens to its pH?

  1. It decreases.
  2. It increases ✓
  3. It remains the same.
  4. It depends on the specific acid.
Explanation

pH increases when you dilute acid. Adding water makes fewer H⁺ ions per unit volume. Fewer H⁺ ions means less acidic and higher pH.

pH scale runs 0 to 14. Lower numbers are more acidic. Dilution always raises pH toward 7.

Remember: Strong acids have pH 0-3. Diluting moves them closer to pH 7 but never past it.

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