Carboxylic Acids And Derivatives
For the esterification reaction CH3COOH + C2H5OH <=> CH3COOC2H5 + H2O, if at equilibrium [CH3COOH] = 0.20 M, [C2H5OH] = 0.20 M, [CH3COOC2H5] = 0.30 M and [H2O] = 0.30 M, the value of Kc is:
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About This Question
- Subject
- chemistry
- Chapter
- organic compounds containing oxygen
- Topic
- carboxylic acids and derivatives
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
2.25
For CH3COOH + C2H5OH <=> CH3COOC2H5 + H2O, Kc = ([ester][water])/([acid][alcohol]). Substituting concentrations gives Kc = (0.30 x 0.30)/(0.20 x 0.20) = 0.09/0.04 = 2.25. The value being greater than 1 indicates products are moderately favored at this equilibrium state.
This hard difficulty chemistry question is from the chapter organic compounds containing oxygen, covering the topic of carboxylic acids and derivatives. It appeared in the 2025 exam.
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