Question

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

	1.	0.25 m	NaCl		A.	Highest boiling point
	2.	0.20 m	K2CO3		B.	Second highest boiling point
	3.	0.28 m	BaS		C.	Third highest boiling point
	4.	0.53 m	Ethylene glycol(nonelectrolyte)		D.	Lowest boiling point

b.

	1.	0.18 m	BaCl2		A.	Highest boiling point
	2.	0.19 m	FeI2		B.	Second highest boiling point
	3.	0.20 m	CoI2		C.	Third highest boiling point
	4.	0.50 m	Ethylene glycol(nonelectrolyte)		D.	Lowest boiling point

Answer 1

a ) answer : 2 -A , 4 -B , 3- C , 1 -D

explanation:

for NaCl , i = 2 number of ions 2 they are Na+ , Cl- so i =2

1) 0.25 m NaCl means = 0.25 x 2 = 0.50 m NaCl

2) 0.20 m K2CO3 = 0.20 x 3 = 0.60 m K2CO3

3) 0.28 m BaS = 0.28 x 2 = 0.52 m BaS

4) 0.53 m glycol = 0.53 x 1 = 0.53 m glycol

now highest value will have highest boiling point.

2 ) 0.60 m K2CO3 -----------> Highest boiling point

4) 0.53 m glycol -----------> second Highest boiling point

3) 0.52 m BaS---------> third Highest boiling point

1) 0.50 m NaCl -----------> lowest Highest boiling point

b) answer : 3 - A , 2 -B , 1 -C , 4 -D

same above explanation: