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

JAMB Chemistry 2023 53 views

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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