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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Using Raoult’s law explain how the total vapour pressure over the solution is related to mole fraction of components in the following solutions. NaCl(s) and H2O(l) - Chemistry

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प्रश्न

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

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

दीर्घउत्तर
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उत्तर

For a solution containing non-volatile solute i.e. \[\ce{NaCl(s) and H2O(l)}\], the Raoult's law is applicable only to vaporisable component (1) i.e. \[\ce{H2O(l)}\] and total vapur pressure is written as

`p = p_1 = x_1p_1^0`

where `p_1^0` represents the vapour pressure of pure \[\ce{H2O(l)}\]

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पाठ 2: Solutions - Exercises [पृष्ठ २७]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 2 Solutions
Exercises | Q VI. 56. (ii) | पृष्ठ २७

संबंधित प्रश्‍न

State Raoult’s law for the solution containing volatile components


What is meant by positive deviations from Raoult's law? Give an example. What is the sign of ∆mixH for positive deviation?


Why does a solution containing non-volatile solute have higher boiling point than the pure solvent ?


An aqueous solution of 2% non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent. What is the molar mass of the solute?


The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.


What type of azeotrope is formed by positive deviation from Raoult’s law?


For the reaction :

\[\ce{2NO_{(g)} ⇌ N2_{(g)} + O2_{(g)}}\];

ΔH = -heat

K= 2.5 × 10at 298K

What will happen to the concentration of Nif :

(1) Temperature is decreased to 273 K.

(2) The pressure is reduced


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


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


An aqueous solution of hydrochloric acid:


Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult’s law?


On the basis of information given below mark the correct option.

(A) In bromoethane and chloroethane mixture intermolecular interactions of A–A and B–B type are nearly same as A–B type interactions.

(B) In ethanol and acetone mixture A–A or B–B type intermolecular interactions are stronger than A–B type interactions.

(C) In chloroform and acetone mixture A–A or B–B type intermolecular interactions are weaker than A–B type interactions.


On the basis of information given below mark the correct option.
On adding acetone to methanol some of the hydrogen bonds between methanol molecules break.


Two liquids X and Y form an ideal solution. The mixture has a vapour pressure of 400 mm at 300 K when mixed in the molar ratio of 1 : 1 and a vapour pressure of 350 mm when mixed in the molar ratio of 1 : 2 at the same temperature. The vapour pressures of the two pure liquids X and Y respectively are ______.


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.


The vapour pressure of pure liquid X and pure liquid Y at 25°C are 120 mm Hg and 160 mm Hg respectively. If equal moles of X and Y are mixed to form an ideal solution, calculate the vapour pressure of the solution.


An azeotropic mixture of two liquids will have a boiling point lower than either of the two liquids when it ______.


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