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Physical Properties of Ammonia

45 An aqueous...

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45 An aqueous solution freezes at -0.36^°C the values of Kf & Kb are 1.8 & 0.52 respectively find the boiling point of it at 1atm pressure.

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Q. An aqueous solution freezes at

- {0.36}^{o} C . K_{f}

K_{b}

1.8

0.52 K k g m o l^{- 1}

respectively. Then the value of the boiling point of solution at

1 a t m

Q. An aqueous solution freezes at 272.4 K while pure water freezes at 273 K. Determine the boiling point of the solution.

K_{f} = 1.86

^{- 1}

K_{b} = 0.512

^{- 1}

and vapour pressure of water at

298 K = 23.756

Q. An aqueous solution freezes at

272.4 K

, while pure water freezes at

273.0 K

, while pure water freezes at

273.0 K

. Determine
(a) the molality of the solution
(ii) boiling point of the solution
(iii) lowering of vapour pressure of water at

298 K

K_{f} = 1.86 K k g m o l^{- 1}, K_{b} = 0.512 K k g m o l^{- 1}

and vapour pressure of water at

298 K = 22.756

Q. An aqueous solution freezes at

- {0.186}^{o} C

(K_{f} = 1.86 K k g m o l^{- 1}, K_{b} = 0.512 K k g m o l^{- 1})

. The evalation of boiling point of the solution is____________.

Q. Freezing point of an aqueous solution is

{- 0.186}^{o} C

. If the values of

K_{b}

K_{f}

of water are respectively

0.52

K

k g

{m o l}^{- 1}

1.86

K

k g

{m o l}^{- 1}

then the elevation of boiling point of the solution in

K

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