An electrolyte `AB` is `50%` ionised in aqueous solution. Calculate the freezing point of `1` molal aqueous solution.

Explanation

To calculate the freezing point of a 1 molal aqueous solution of an electrolyte AB that is 50% ionized, we will follow these steps:

### Step 1: Determine the degree of ionization
Given that the electrolyte AB is 50% ionized, it means that for every mole of AB that dissolves, 0.5 moles will dissociate into ions. Therefore, we can express the ionization as:
- \( \alpha = 0.5 \) (where \( \alpha \) is the degree of ionization)

### Step 2: Calculate the number of particles in solution
For a 1 molal solution of AB:
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