Why cannot sodium and potassium be prepared by the electrolysis of their aqueous solutions ?

Explanation

To understand why sodium (Na) and potassium (K) cannot be prepared by the electrolysis of their aqueous solutions, we need to look at the electrochemical properties of these metals and the behavior of water during electrolysis.

### Step-by-Step Solution:

1. **Understanding Electrolysis**:
- Electrolysis is a process that uses electrical energy to drive a non-spontaneous chemical reaction. In the case of aqueous solutions, when an electric current is passed through the solution, ions migrate towards the electrodes where they can either gain or lose electrons.

2. **Electrolysis of Aqueous Solutions**:
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