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Some Liquids on Mixing Form 'Azeotropes'. What Are 'Azeotropes'? - Chemistry

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प्रश्न

Some liquids on mixing form 'azeotropes'. What are 'azeotropes'?

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उत्तर

Azeotropic solutions are those solutions whose boiling points remain constant. As a result, both components boil at the same temperature, regardless of difference in their respective boiling points.

Thus, binary mixtures that have the same composition in liquid and vapour phase and have constant boiling points are called azeotropes. It is not possible to separate the components of azeotropes by fractional distillation.
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2013-2014 (March) Delhi Set 2

संबंधित प्रश्न

In non-ideal solution, what type of deviation shows the formation of maximum boiling azeotropes?


Calculate the mass of a non-volatile solute (molar mass 40 g mol−1) which should be dissolved in 114 g octane to reduce its vapour pressure to 80%.


A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate:

  1. molar mass of the solute.
  2. vapour pressure of water at 298 K.

100 g of liquid A (molar mass 140 g mol−1) was dissolved in 1000 g of liquid B (molar mass 180 g mol−1). The vapour pressure of pure liquid B was found to be 500 torr. Calculate the vapour pressure of pure liquid A and its vapour pressure in the solution if the total vapour pressure of the solution is 475 Torr.


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State Raoult’s law for a solution containing volatile components. Write two characteristics of the solution which obey Raoult’s law at all concentrations. 


Raoult’s law states that for a solution of volatile liquids the partial pressure of each component in the solution is ____________.


At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ______.


Using Raoult’s law explain how the total vapour pressure over the solution is related to mole fraction of components in the following solutions.

\[\ce{NaCl(s) and H2O(l)}\]


If the weight of the non-volatile solute urea (NH2–CO–NH2) is to be dissolved in 100 g of water, in order to decrease the vapour-pressure of water by 25%, then the weight of the solute will be ______ g.


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