Ideal and Nonideal Solutions
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Questions and Answers

What is the characteristic of an ideal solution according to Raoult's Law?

  • It doesn't obey Raoult's Law at all concentrations and temperatures
  • It shows a positive deviation from Raoult's Law
  • It obeys Raoult's Law at all concentrations and temperatures (correct)
  • It has a volume change after mixing

    • What happens to the volume of a solution when there is a positive deviation from Raoult's Law?

  • There is no change in volume after mixing
  • There is a decrease in volume after mixing
  • There is an increase in volume after mixing (correct)
  • The volume becomes infinite after mixing

    • Which of the following solutions exhibits a negative deviation from Raoult's Law?

  • CCl4 + CHCl3
  • Acetone + aniline (correct)
  • Acetone + ethanol
  • Benzene + toluene

    • What is the relationship between the solubility of a gas and the pressure of the gas according to Henry's Law?

    <p>The solubility of a gas is directly proportional to the pressure of the gas</p> Signup and view all the answers

    What is the characteristic of a solution that shows a positive deviation from Raoult's Law?

    <p>The intermolecular forces between the components are weaker than the forces between the like molecules</p> Signup and view all the answers

    What happens to the heat of mixing when there is a positive deviation from Raoult's Law?

    <p>Heat is absorbed</p> Signup and view all the answers

    Which of the following is an example of an ideal solution?

    <p>Benzene + toluene</p> Signup and view all the answers

    What is the effect of a positive deviation from Raoult's Law on the boiling point of a solution?

    <p>The boiling point of the solution decreases</p> Signup and view all the answers

    What is the relationship between the pressure and mole fraction of a gas according to Henry's Law?

    <p>P = KH X</p> Signup and view all the answers

    What is the effect of adding a solute to a solvent on its boiling point?

    <p>The boiling point increases</p> Signup and view all the answers

    What is the equation for the elevation in boiling point of a solution containing a nonelectrolyte?

    <p>∆Tb = Kb m</p> Signup and view all the answers

    What is the effect of adding a solute to a solvent on its freezing point?

    <p>The freezing point decreases</p> Signup and view all the answers

    What is the equation for the depression in freezing point of a solution containing a nonelectrolyte?

    <p>∆Tf = Kf m</p> Signup and view all the answers

    What is the definition of the molal elevation constant?

    <p>The elevation in boiling point produced when one mole of solute is dissolved in 1Kg of solvent</p> Signup and view all the answers

    What is the process of the spontaneous movement of pure solvent into a solution through a semipermeable membrane called?

    <p>Osmosis</p> Signup and view all the answers

    What is the purpose of a semipermeable membrane in osmosis?

    <p>To allow only solvent molecules to pass through</p> Signup and view all the answers

    What property is indicated by the decrease in vapour pressure when a nonvolatile solute is dissolved in a solvent?

    <p>Colligative Properties</p> Signup and view all the answers

    Which of the following solutions will exhibit the highest elevation in boiling point?

    <p>1M Na2SO4</p> Signup and view all the answers

    Which law is primarily concerned with the solubility of gases in liquids in response to pressure?

    <p>Henry's Law</p> Signup and view all the answers

    What is the term for the behaviour where the observed vapour pressure of a solution is higher than expected?

    <p>Positive Deviation</p> Signup and view all the answers

    Which property corresponds to the ratio of the number of moles of a component to the total number of moles in a solution?

    <p>Mole Fraction</p> Signup and view all the answers

    What is the primary effect seen when boiling point elevation occurs?

    <p>Increase in boiling point</p> Signup and view all the answers

    Raoult's Law is used to describe which of the following?

    <p>Vapour pressure of an ideal solution</p> Signup and view all the answers

    In terms of colligative properties, which of the following is not true?

    <p>Depend on the nature of particles</p> Signup and view all the answers

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