SATHEE: Solutions Question 361

Solutions Question 361

Question: 1.0 M aqueous solution of $C r C l_{3} .6 H_{2} O$ freezes at $- 5.58^{\circ} C$ . Assuming complete ionization of the hydrated complex, which of the following isomers conforms to the observation ( $K_{f}$ for water $= 1.86 K, k g, m o l^{- 1}$ )-

Options:

A) $[C r {(H_{2} O)}_{3} C l_{3}] .3 H_{2} O$

B) $[C r {(H_{2} O)}_{4} C l_{4}] C l .2 H_{2} O$

C) $[C r {(H_{2} O)}_{5} C l] C l_{2} . H_{2} O$

D) $[C r {(H_{2} O)}_{6}] C l_{3}$

Show Answer

Answer:

Correct Answer: C

Solution:

$i = \frac{5.58}{1.86} = 3;$

$[C r {(H_{2} O)}_{5} C l] C l_{2} . H_{2} O \overset{}{\to}$ ${[C r {(H_{2} O)}_{5} C l]}^{2 +} + 2 C l^{-}$

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Solutions Question 361

Question: 1.0 M aqueous solution of CrCl3.6H2O freezes at −5.58∘C . Assuming complete ionization of the hydrated complex, which of the following isomers conforms to the observation ( Kf for water =1.86K,kg,mol−1 )-

Options:

Answer:

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Question: 1.0 M aqueous solution of $C r C l_{3} .6 H_{2} O$ freezes at $- 5.58^{\circ} C$ . Assuming complete ionization of the hydrated complex, which of the following isomers conforms to the observation ( $K_{f}$ for water $= 1.86 K, k g, m o l^{- 1}$ )-