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Question

A solution consists of 1 mole each of CH3COOH and CH3COONa. The pKa of acetic acid is 4.8. What is the pH of the solution, when 0.1 mole of NaOH is added?
  1. Slightly less than 4.8
  2. 4.8
  3. Slightly greater than 4.8
  4. 7

A
Slightly greater than 4.8
B
Slightly less than 4.8
C
7
D
4.8
Solution
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When equimolar amounts of acetic acid and sodium acetate are present, pH=pKa=4.8.

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