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Q.

The depression in freezing point of water containing ethylene glycol is 7.4°C. Find the mass of ethylene glycol added in 500g water (Kf = 1.86 K kg mol-1)

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a

233.3g

b

23.3g

c

12.33g

d

123.3g

answer is C.

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Detailed Solution

\Delta T_f=k_fm\\7.4=1.86(\frac{W}{62}X\frac{1000}{500})\\W=123g

 

 

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