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Difficulty: MediumAlkanoic Acids, Esterification, Saponification, Fats, and Oils

Which of the following statements correctly distinguishes the esterification reaction between ethanoic acid and ethanol from the neutralization reaction between ethanoic acid and aqueous sodium hydroxide?

  1. Esterification is a slow, reversible covalent reaction catalyzed by an acid, whereas neutralization is a rapid, irreversible ionic reaction.Answer
  2. B
    Esterification is a rapid, irreversible ionic reaction, whereas neutralization is a slow reversible reaction that requires refluxing.
  3. C
    Esterification yields a alkanoic acid salt and water, whereas neutralization yields an ester and glycerol.
  4. D
    Concentrated tetraoxosulfate(VI) acid acts as an oxidizing agent in esterification, while sodium hydroxide acts as a dehydrating catalyst in neutralization.

Answer

Esterification is a slow, reversible covalent reaction catalyzed by an acid, whereas neutralization is a rapid, irreversible ionic reaction.
The statement identifying esterification as a slow, reversible covalent reaction catalyzed by an acid and neutralization as a rapid, irreversible ionic reaction is correct because organic esterification involves covalent bond rearrangement reaching dynamic equilibrium, whereas neutralization is an ionic combination forming water completely.

Step-by-Step Solution

1
Analyze the nature of esterification
Esterification takes place between an alkanoic acid and an alkanol in the presence of concentrated H2SO4\text{H}_2\text{SO}_4. It is a reversible, molecular (covalent) reaction that proceeds slowly to reach equilibrium.
Covalent bond cleavage and formation require activation energy and proceed reversibly.
2
Analyze the nature of neutralization
Neutralization takes place between ethanoic acid and a strong base (NaOH\text{NaOH}), forming sodium ethanoate salt and water completely.
The reaction involves free ions in solution (H++OH−→H2O\text{H}^+ + \text{OH}^- \rightarrow \text{H}_2\text{O}), making it rapid and virtually quantitative (irreversible).
3
Compare the key characteristics
Esterification is slow, reversible, and acid-catalyzed; neutralization is rapid, irreversible, and ionic.
This highlights the fundamental difference between organic ester formation and acid-base salt formation.

Key Concept

Reversibility and Kinetics of Esterification vs Neutralization
Estimated Time:1m 0s
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Topics

Alkanoic Acids, Esterification, Saponification, Fats, and Oils

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