Colligative Properties of Solutions Quiz
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Questions and Answers

Which property of solutions depends only on the numbers of solute particles in solution and not on the nature of the solute particles?

  • Osmotic pressure
  • Boiling point elevation
  • Vapor pressure lowering (correct)
  • Freezing point depression

What is the term for the pressure exerted by the vapor when it is at equilibrium with the liquid?

  • Osmotic pressure
  • Vapor pressure (correct)
  • Surface tension
  • Atmospheric pressure

What type of substance has no measurable vapor pressure?

  • Nonvolatile (correct)
  • Solvent
  • Volatile
  • Solute

Which type of solution is formed when a volatile liquid solvent and a nonvolatile solute mix spontaneously?

<p>Dilute solution (A)</p> Signup and view all the answers

What is the effect of a nonvolatile solute on the vapor pressure of the solvent?

<p>Decreases vapor pressure (D)</p> Signup and view all the answers

Which property of solutions depends only on the numbers of solute particles in solution and not on the nature of the solute particles?

<p>Freezing point depression (D)</p> Signup and view all the answers

What is the effect of a nonvolatile solute on the vapor pressure of the solvent?

<p>It decreases the vapor pressure (A)</p> Signup and view all the answers

What type of substance has no measurable vapor pressure?

<p>Nonvolatile substance (D)</p> Signup and view all the answers

Which colligative property is responsible for the stabilization of solvent molecules in their liquid state when a nonvolatile solute is present?

<p>Vapor pressure lowering (C)</p> Signup and view all the answers

What is the term for the pressure exerted by the vapor when it is at equilibrium with the liquid?

<p>Vapor pressure (C)</p> Signup and view all the answers

True or false: A substance that has no measurable vapor pressure is nonvolatile?

<p>True (A)</p> Signup and view all the answers

True or false: The vapor pressure of a solution containing a nonvolatile solute is higher than the vapor pressure of the pure solvent?

<p>False (B)</p> Signup and view all the answers

True or false: The vapor pressure of a volatile solvent above a solution containing a nonvolatile solute is directly proportional to the solvent’s concentration in the solution?

<p>True (A)</p> Signup and view all the answers

True or false: Colligative properties of solutions depend on the nature of the solute particles?

<p>False (B)</p> Signup and view all the answers

True or false: The increase in entropy that accompanies the mixing of a volatile liquid solvent and a nonvolatile solute causes the stabilization of solvent molecules in their liquid state?

<p>True (A)</p> Signup and view all the answers

Flashcards

What are colligative properties?

Colligative properties are properties of solutions that depend only on the number of solute particles present, not on their identity.

What is vapor pressure?

Vapor pressure is the pressure exerted by the vapor when it is at equilibrium with the liquid.

What is a nonvolatile substance?

A nonvolatile substance has no measurable vapor pressure.

How does a nonvolatile solute affect vapor pressure?

A nonvolatile solute lowers the vapor pressure of the solvent.

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What is vapor pressure lowering?

Vapor pressure lowering is the decrease in vapor pressure of a solvent when a nonvolatile solute is added.

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What is freezing point depression?

Freezing point depression is the lowering of the freezing point of a solvent when a nonvolatile solute is added.

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What is a volatile substance?

A volatile substance has a measurable vapor pressure.

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Why is the vapor pressure of a solution lower than the pure solvent?

The presence of a nonvolatile solute hinders the solvent molecules from escaping into the vapor phase, leading to a lower vapor pressure.

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How does vapor pressure lowering stabilize the liquid state?

Vapor pressure lowering stabilizes the liquid state because it reduces the tendency of the solvent molecules to escape into the vapor phase, making it harder for the liquid to boil and evaporate.

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Is vapor pressure lowering a colligative property?

Yes, vapor pressure lowering is a colligative property because it depends only on the number of solute particles present, not on their nature.

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What is the relationship between solute concentration and vapor pressure?

The vapor pressure of a volatile solvent above a solution containing a nonvolatile solute is directly proportional to the solvent’s concentration in the solution.

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Do colligative properties depend on the nature of the solute?

No, colligative properties do not depend on the nature of the solute particles.

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Is entropy increased when a volatile solvent and nonvolatile solute mix?

Yes, the increase in entropy that accompanies the mixing of a volatile liquid solvent and a nonvolatile solute causes the stabilization of solvent molecules in their liquid state.

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