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Ionic Radii and Ionisation Enthalpy (Group 2)

14. A urea so...

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14. A urea solution has boiling point 373.128K then what is its melting point ? Given kf =1.86 and kb =0.52.

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Q. A solution of urea in water has boiling point of

{100.15}^{o} C .

Calculate the freezing point of the same solution if

K_{f}

K_{b}

for water are 1.87 K kg

m o l^{- 1}

m o l^{- 1}

Q. A non-volatile solute is dissolved in a water. If its degree of association is

50 %

. What will be the freezing point of solution when its boiling point is

{100.52}^{o}

[K_{b} = 0.52

m o l^{- 1}

K_{f} = 1.86

m o l^{- 1}]

Q. The boiling point of an aqueous urea solution is

101.04^{\circ} C

. The density of solution is 1.12 g/mL. Which of the following is/are correct statement(s) regarding this solution?
[Given: For water,

K_{b} = 0.52 {K kg mol}^{- 1}, K_{f} = 1.86 {K kg mol}^{- 1}

]

Q. An aqueous solution of urea has freezing point

- {0.52}^{o} C .

Then its molality will be:

K_{f} = {1.86}^{0} C / m

Q. A solution of urea in water has a boiling point of

{100.18}^{\circ} C .

Calculate the freezing point of the same solution. Molal depression and elevation constants for water

K_{f}

K_{b}

{1.86}^{\circ} C k g m o l^{- 1}

{0.512}^{\circ} C k g m o l^{- 1}

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