ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.51

MEDIUM

12th ICSE

IMPORTANT

Earn 100

The vapour pressure of a $5 %$ aqueous solution of a non-volatile organic substance at $373 K$ is $745 mm Hg$ . Calculate the molar mass of the substance.

Important Questions on Solutions

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.52

A solution containing

34.2 g

of sugar dissolved in

1

litre of water has an osmotic pressure of

2.522

atmospheres at

20 ° C

. Calculate the value of gas constant,

R

.

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.53

The vapour pressure of a dilute aqueous solution of a non-volatile solute (molar mass

180 g {mol}^{- 1}

) at

373 K

is

750 mm Hg

. Calculate molality.

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.53

The vapour pressure of a dilute aqueous solution of a non-volatile solute (molar mass

180 g {mol}^{- 1}

) at

373 K

is

750 mm Hg

. Calculate mole fraction of solute.

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.54

The vapour pressure of pure benzene at a certain temperature is

640 mm Hg

. A non-volatile solute weighing

2.175 g

is added to

39.0 g

of benzene. The vapour pressure of solution is

600 mm Hg

. What is the molar mass of the solute?

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.55

What weight of glucose (mol. wt.

= 180

) should be added to

1700 g

of water at

20^{0} C

to lower its vapour pressure by

0.001 mm

? The vapour pressure of water at

20^{0} C

is

17 mm Hg

.

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.56

A current of dry air was passed through a solution of

2.5 g

of a non-volatile solute in

100 g

of water and through water alone. The loss in the weight of solution was

1.25 g

and that of water was

0.005 g

. Calculate the molecular mass of the solute.

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.57

The molal elevation constant for water is

0.56 ° C

per kg of water. Calculate the boiling point of solution made by dissolving

6 g

of urea in

200 g

of water.

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.58

0.72 g

of camphor in

32 g

of acetone produces an elevation of

0.25 ° C

in the boiling point of acetone. Calculate the molecular mass of camphor. (

k_{b}

for acetone

= 1.72 K kg {mol}^{- 1}

)