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Question

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at 6oC will be :

(Kf for water = 1.86 K kg/mol and molar mass of ethylene glycol = 62 g mol1)

A
304.6 g
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B
800 g
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C
204.3 g
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D
400.00 g
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Solution

The correct option is B 800 g
T=Kf×wB×1000mB×wA

6=1.86×wB×100062×4000

wB=800g

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