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According to the table, which solution undergoes the smallest change in pH (most effective buffer)?
Which solution undergoes the largest change in ph (least effective buffer)?

SOLUTION [HC₃H₅O₃](M) | [C₃H₅O-₃](M) | solution pH |pH after addition of HCI | pH after addition of NaOH

1. 0.10 0.90 4.80 3.67 0.60
2. 0.30 0.70 4.22 3.25 0.60
3. 0.50 0.50 3.85 0.60 0.60
4. 0.70 0,30 3.48 0.60 4.45
5. 0.90 0.10 2.91 0.60 4.03



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