Solutions Question 80
Question: What should be the freezing point of aqueous solution containing $ 17,gm $ of $ C_2H_5OH $ in $ 1000,gm $ of water (water $ K_{f} $ = 1.86 $ \deg -kg,mo{l^{-1}} $ [MP PMT 1986]
Options:
A) $ -{{0.69}^{o}}C $
B) $ -{{0.34}^{o}}C $
C) $ {{0.0}^{o}}C $
D) $ {{0.34}^{o}}C $
Show Answer
Answer:
Correct Answer: A
Solution:
$ \Delta T_{f}=\frac{1000\times 1.86\times 17}{46\times 1000}={{0.69}^{o}}C $
$ T_{f}=0-0.69=-{{0.69}^{o}}C $
