36 Questions
What is the term used to describe the difference in the boiling point of a solution and the boiling point of the pure solvent?
Elevation of boiling point
What is the process of studying the elevation in boiling point of a liquid in which a non-volatile solute is dissolved?
Ebullioscopy
What is the pressure at which a liquid boils at its normal boiling point?
760 mm
What is the term used to describe a solution that has more osmotic pressure than another solution?
Hypertonic solution
What is the effect of adding a non-volatile solute to a pure solvent on its vapour pressure?
It decreases the vapour pressure
What is the difference in the freezing point of a pure solvent and a solution called?
Depression of freezing point
What is the relationship between depression in freezing point and the lowering of vapour pressure?
Depression in freezing point is directly proportional to the lowering of vapour pressure
What is the unit of molal depression constant (Kf)?
K kg/mol
What is the expression for the depression in freezing point of a solution?
ΔTf = Kf × m
What is the relationship between the elevation in boiling point and the lowering of vapour pressure?
Elevation in boiling point is directly proportional to the lowering of vapour pressure
What is the term given to the study of the depression in freezing point of a solution?
Cryoscopy
What is the expression for the molality of a solution in terms of the depression in freezing point?
m = 1000 × Kf × w / ΔTf × W
What is the value of Kb for water in degree Celsius per kilogram per mole?
0.52
What is the relationship between the freezing point of a solution and that of the pure solvent?
The freezing point of a solution is always lower than that of the pure solvent.
What is the effect of dissociation of a solute on the molality of the solution?
The molality of the solution increases.
What is the relationship between the osmotic pressure of a solution and the flow of solvent?
The flow of solvent is always from lower osmotic pressure to higher osmotic pressure.
What is the effect of association of a solute on the boiling point of a solution?
The boiling point of the solution decreases.
What is the relationship between the molecular weight of a solute and its boiling point elevation?
The boiling point elevation is inversely proportional to the molecular weight of the solute.
What is the advantage of using mole fraction over molarity?
Mole fraction is independent of temperature
Why is mass fraction preferred over molarity?
Mass fraction involves the weights of the solute and solvent
What is the effect of temperature on the volume of a solution?
It has a significant effect on the volume of the solution
What is the demal unit of concentration?
One mole of solute per litre of solution at 0°C
What is the formula for mass fraction of a component in a solution?
Mass of component / Total mass of solution
Why is molality preferred over molarity?
Molality involves the weights of the solute and solvent
What is the condition for two solutes to be isotonic?
They have the same osmotic pressure
What is the effect of dissociation of a solute on the boiling point elevation of a solution?
It increases the boiling point elevation
What is the unit of the molal elevation constant (Kb)?
deg kg mol^-1
What is the relationship between the mass fraction of a solute and its boiling point elevation?
The boiling point elevation is directly proportional to the mass fraction
What is the effect of temperature on the osmotic pressure of a solution?
The osmotic pressure increases with an increase in temperature
What is the relationship between the mole fraction of a solute and its boiling point elevation?
The boiling point elevation is directly proportional to the mole fraction
What is the reason for the difference in boiling point of a solution and the pure solvent?
The addition of a non-volatile solute lowers the vapour pressure of the solvent
What is the effect of adding a non-volatile solute to a pure solvent on its boiling point?
It increases the boiling point of the solvent
What is the relationship between the vapour pressure of a solution and that of the pure solvent?
The vapour pressure of the solution is lower than that of the pure solvent
What is the term used to describe the difference in the boiling point of a solution and the boiling point of the pure solvent?
Elevation in boiling point
What is the method used to determine the elevation in boiling point?
All of the above
What is the effect of adding a non-volatile solute to a pure solvent on its freezing point?
It decreases the freezing point of the solvent
Test your understanding of freezing point depression, its relation to vapour pressure, and the methods used to determine it, such as Beckmann's method and Rast's camphor method. Learn about the important relations and equations involved in cryoscopy.
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