MEDIUM

12th ICSE

IMPORTANT

Earn 100

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.

Important Questions on Solutions

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}

)

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.59

A solution of

12.5 g

urea in

170 g

of water gave a boiling point elevation of

0.63 K

. Calculate the molar mass of urea taking

K_{b} = 0.52 K / m

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.6

An aqueous solution of glucose boils at

100.02 ° C

. What is the number of glucose molecules in the solution containing

100 g

of water? What will be the osmotic pressure of this glucose solution at

27 ° C

? (Given :

K_{b}

for water

0.5 K kg {mol}^{- 1}

R = 0.082 L atm {mol}^{- 1} K^{- 1}

, Avogadro's constant,

N_{A} = 6.02 \times 10^{23} {mol}^{- 1}

)

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.61

An aqueous solution freezes at

272.4 K

, while pure water freezes at

273.0 K

. Determine the molality of the solution. (Given

K_{f} = 1.86 K kg {mol}^{- 1}, K_{b} = 0.512 K kg {mol}^{- 1}

and vapour pressure of water at

298 K = 23.756 mm of Hg

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.61

An aqueous solution freezes at

272.4 K

, while pure water freezes at

273.0 K

. Determine the boiling point of the solution. (Given

K_{f} = 1.86 K kg {mol}^{- 1}, K_{b} = 0.512 K kg {mol}^{- 1}

and vapour pressure of water at

298 K = 23.756 mm of Hg

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.61

An aqueous solution freezes at

272.4 K

, while pure water freezes at

273.0 K

. Determine lowering of vapour pressure of water at

298 K

. (Given

K_{f} = 1.86 K kg {mol}^{- 1}, K_{b} = 0.512 K kg {mol}^{- 1}

and vapour pressure of water at

298 K = 23.756 mm of Hg

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.62

A solution of glucose has been prepared by dissolving

68.4 g

of sucrose in one kg of water. Calculate the vapour pressure of the solution at

298 K

. (Given : Vapour pressure of water at

298 K = 0.024 atm, K_{f} for water = 1.86 K kg {mol}^{- 1}, R = 0.0821 L atm {mol}^{- 1} K^{- 1}

)

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>REVIEW EXERCISES>Q 2.62

A solution of glucose has been prepared by dissolving

68.4 g

of sucrose in one kg of water. Calculate the osmotic pressure of the solution at

298 K

. (Given : Vapour pressure of water at

298 K = 0.024 atm, K_{f} for water = 1.86 K kg {mol}^{- 1}, R = 0.0821 L atm {mol}^{- 1} K^{- 1}

)

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.

Important Questions on Solutions

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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.