Ethylene glycol is used as an antifreeze agent. Calculate the amount of ethylene glycol to be added to 4 kg of water to prevent it from freezing at `-6^(@)C.(K_(f)" for "HH_(2)O=1.85" K mol"^(-1)"kg")`

Explanation

To solve the problem of calculating the amount of ethylene glycol needed to prevent water from freezing at -6°C, we will follow these steps:

### Step 1: Write down the given data
- Weight of water (solvent), \( W_a = 4 \, \text{kg} \)
- Freezing point depression constant for water, \( K_f = 1.85 \, \text{K kg/mol} \)
- Desired freezing point depression, \( \Delta T_f = 0 - (-6) = 6 \, \text{°C} \)
- Molar mass of ethylene glycol (C₂H₆O₂), \( M_b = 62 \, \text{g/mol} \)

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