Conversion of Acetaldehyde into lactic acid ( `alpha `- Hydroxypropionic acid )

Explanation

To convert acetaldehyde into lactic acid (alpha-hydroxypropionic acid), we can follow these steps:

### Step 1: Formation of Cyanohydrin
1. **Starting Material**: Begin with acetaldehyde (ethanal), which has the structure CH₃CHO.
2. **Addition of HCN**: React acetaldehyde with hydrogen cyanide (HCN). The nucleophilic cyanide ion (CN⁻) attacks the electrophilic carbon atom of the carbonyl group (C=O) in acetaldehyde.
3. **Cyanohydrin Structure**: The resulting product is a cyanohydrin. The structure will have a hydroxyl group (OH) and a cyano group (CN) attached to the same carbon atom. The structure can be represented as CH₃C(OH)(CN)H.

### Step 2: Hydrolysis of Cyanohydrin
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