Question

a.

1.	0.29 m	NiSO4		A.	Lowest freezing point
	2.	0.18 m	BaI2		B.	Second lowest freezing point
	3.	0.16 m	CuCl2		C.	Third lowest freezing point
	4.	0.51 m	Sucrose(nonelectrolyte)		D.	Highest freezing point

b. Match the following aqueous solutions with the appropriate letter from the column on the right.

	1.	0.16 m	Ca(NO3)2		A.	Lowest freezing point
	2.	0.18 m	Ca(NO3)2		B.	Second lowest freezing point
	3.	0.25 m	KOH		C.	Third lowest freezing point
	4.	0.44 m	Ethylene glycol(nonelectrolyte)		D.	Highest freezing point

Answer 1

The depression in the freezing point
Here i is the vant Hoff factor, Kf is the molal depression in the freezing point constant and m is the molality of solution.
A solution with maximum value of and lowest freezing point.
a)
1) 0.29 m NiSO4
2) 0.18 m BaI2
3) 0.16 m CuCl2
4) 0.51 m sucrose
(1) = A
(2) = B
(3) = D
(4) = C

b)
1) 0.16 m Ca(NO3)2
2) 0.18 m Ca(NO3)2
3) 0.25 m KOH
4) 0.44 m ethylene glycol
(2) = A
(3) = B
(1) = C
(4) = D