The function of sodalime (a mixture of solid NaOH and solid CaO) in the decarboxylation reaction is

Options

A. to increase the rate of reaction
B. to decrease the rate of reaction
C. to change the rate of reaction
D. to cease the reaction

Answer

To solve the question regarding the function of sodalime in the decarboxylation reaction, let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding Decarboxylation**:
- Decarboxylation is a chemical reaction that involves the removal of a carboxyl group (-COOH) from a molecule, releasing carbon dioxide (CO2). This reaction typically occurs in the presence of a base.

2. **Composition of Sodalime**:
- Sodalime is a mixture of sodium hydroxide (NaOH) and calcium oxide (CaO). It is used in various chemical reactions, including decarboxylation.

3. **Role of Calcium Oxide (CaO)**:
- Calcium oxide is hygroscopic, meaning it has the ability to absorb moisture from the environment. This property is crucial in the context of decarboxylation.

4. **Effect of Moisture on Decarboxylation**:
- The presence of water can hinder the decarboxylation reaction. Water can react with the carboxylate ions, which can slow down or even stop the reaction from proceeding effectively.

5. **Function of Sodalime in Decarboxylation**:
- When sodalime is added to the reaction mixture, the calcium oxide absorbs any moisture present. By removing water, it helps to maintain a dry environment that is conducive to the decarboxylation process.

6. **Conclusion**:
- Therefore, the function of sodalime in the decarboxylation reaction is to **decrease the rate of reaction** by absorbing moisture, which would otherwise interfere with the reaction.

### Final Answer:
The correct option is **B) may have to decrease rate of reaction**.

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