A strong acid of pH 1 is diluted until its volume is 100 times larger. What is the new pH, approximately?
Answer and explanation
Correct answer: A. 3
- Step 1: Diluting 100 times divides by 100.
- Step 2: mol/L, so pH = 3.
Answer
3.
Why not the others: 5: the effect of the dilution was counted twice. 1: dilution was assumed not to change the pH. -1: diluting an acid makes the pH rise, not fall.
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