Ethyl acetate can be prepared by .

Options

A. reaction of ethyl alcohol with acetic acid in presence of dry HCl gas .
B. treatment of acetaldehyde with `Al (OC_(2)H_(5))_(3)` .
C. reaction of acetyl chloride with ethyl alcohol
D. reaction of acetic anhydride with ethyl alcohol

Answer

To prepare ethyl acetate, we can consider several methods. Here’s a step-by-step breakdown of the different reactions that can lead to the formation of ethyl acetate:

### Method 1: Esterification Reaction
1. **Reactants**: Ethyl alcohol (C2H5OH) and acetic acid (CH3COOH).
2. **Reaction**: When ethyl alcohol reacts with acetic acid in the presence of a dehydrating agent like dry HCl, an esterification reaction occurs.
3. **Mechanism**:
- The hydroxyl group (OH) from acetic acid leaves, and the ethyl group (C2H5) from ethyl alcohol attacks the carbonyl carbon of acetic acid.
- This forms ethyl acetate (CH3COOC2H5) and water.
4. **Product**: Ethyl acetate is formed.

### Method 2: Treatment of Acetaldehyde with Aluminium Ethoxide
1. **Reactants**: Acetaldehyde (CH3CHO) and aluminium ethoxide (Al(C2H5)3).
2. **Reaction**: This reaction is known as the Tischenko reaction.
3. **Mechanism**:
- Acetaldehyde is oxidized to acetic acid and simultaneously reduced to ethanol.
- The resulting products can react to form ethyl acetate.
4. **Product**: Ethyl acetate is formed.

### Method 3: Reaction of Acetyl Chloride with Ethyl Alcohol
1. **Reactants**: Acetyl chloride (CH3COCl) and ethyl alcohol (C2H5OH).
2. **Reaction**: This is another esterification reaction.
3. **Mechanism**:
- The hydroxyl group from ethyl alcohol attacks the carbonyl carbon of acetyl chloride, leading to the formation of ethyl acetate and hydrochloric acid (HCl).
4. **Product**: Ethyl acetate is formed.

### Method 4: Reaction of Acetic Anhydride with Ethyl Alcohol
1. **Reactants**: Acetic anhydride (CH3CO)2O and ethyl alcohol (C2H5OH).
2. **Reaction**: This is also an esterification reaction.
3. **Mechanism**:
- Ethyl alcohol attacks the carbonyl carbon of acetic anhydride, resulting in the formation of ethyl acetate and acetic acid.
4. **Product**: Ethyl acetate is formed along with acetic acid.

### Conclusion
All four methods mentioned above are valid for the preparation of ethyl acetate. Therefore, ethyl acetate can be prepared by:
- Reaction of ethyl alcohol with acetic acid.
- Treatment of acetaldehyde with aluminium ethoxide.
- Reaction of acetyl chloride with ethyl alcohol.
- Reaction of acetic anhydride with ethyl alcohol.