Suggest a method for the laboratory
preparation of DCl. Write a balanced
equation for the reaction.

Explanation

To prepare deuterium chloride (DCl) in the laboratory, we can use the hydrolysis of phosphorus pentachloride (PCl5) with heavy water (D2O). Here’s a step-by-step solution:

### Step 1: Understand the Reactants
- **PCl5**: Phosphorus pentachloride is a chemical compound that can react with water.
- **D2O**: Heavy water, which contains deuterium (an isotope of hydrogen), is used instead of regular water (H2O).

### Step 2: Write the Balanced Reaction for Hydrolysis
1. **Initial Reaction**: When PCl5 reacts with D2O, it undergoes hydrolysis.
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