Solutions Question 394

Question: A solution of 0.2 mole $ Kl $

$ (\alpha =100,%) $ in 1000 g water freezes at $ T_1{{,}^{0}}C $ . Now to this solution 0.1 mole $ HgI_2 $ is added and the resulting solution freezes at $ T_2{{,}^{0}}C $ . Which of the following is correct:

Options:

A) $ T_1=T_2 $

B) $ T_1>T_2 $

C) $ T_1<T_2 $

D) Nothing can be predict

Show Answer

Answer:

Correct Answer: C

Solution:

$ 2KI+HgI_2\to K_2[HgI_4] $ $ K_2HgI_4\xrightarrow[{}]{{}}2{K^{+}}+{{[HgI_4]}^{-2}} $ 2 KI will give 4 ions whereas after mixing of 2 KI we are obtaining only 3 ions.



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