Question

Which of the following solutions will exhibit highest boiling point? 0.01M sodium sulphate,
0.01M potassium nitrate, 0.015M urea, 0.015M glucose

Answer 1

Answer:

0.01 M Sodium Sulphate

Explanation:

If (i x M) is More, Boiling Point is More.(i being the Van't Hoff Factor)

Checking (ixM) of the options -

1) 3 x 0.01 = 0.03(Na2SO4  i =3)

2) 2 x 0.01 = 0.02(KNO3 i =2)

3) 1 x 0.15 = 0.15(Urea i =1)

4) 1 x 0.15 = 0.15(Glucose i =1)

So Answer: 0.01 M Sodium Sulphate

Additional Info,

(i x M) is Directly Proportional to Boiling Point and Osmotic Pressure

and is Inversely Proportional to Vapour Pressure and Freezing Point