Colligative properties Notes Recap

What are colligative properties influenced by?

• The type of solute particles

• The number of solute particles

• The color of the solute particles

• The size of the solute particles

Answer explanation

Colligative properties are influenced by the number of solute particles dissolved in a solvent, not by the type, color, or size of the solute particles.

Which of the following is NOT a colligative property that changes when the amount of solute is changed?

• Vapor pressure

• Boiling point

• Freezing point

• Electrical conductivity

Answer explanation

The correct choice is Electrical conductivity because it is not a colligative property that changes when the amount of solute is changed.

The point at which the vapor pressure of a liquid equals the atmospheric pressure is called (a)   .

• Condensation point
• Melting point
• Boiling point
• Freezing point

Answer explanation

The point at which the vapor pressure of a liquid equals the atmospheric pressure is called the Boiling point.

What is necessary for a liquid to start boiling?

• Decreasing the atmospheric pressure below the vapor pressure of the liquid

• Increasing the vapor pressure of the liquid until it equals the atmospheric pressure

• Cooling the liquid until it reaches its freezing point

• Increasing the atmospheric pressure above the vapor pressure of the liquid

Answer explanation

Increasing the vapor pressure of the liquid until it equals the atmospheric pressure

Temperature measures the (a)   in terms of particle behavior.

• The potential energy of particles
• The total energy of particles
• The kinetic energy of particles
• The chemical energy of particles

Answer explanation

Temperature measures the kinetic energy of particles, which is the energy associated with their motion.

What is kinetic energy associated with in the context of particles?

• Spatial arrangement

• Movement

• Electrical charge

• Mass

Answer explanation

Kinetic energy is associated with movement in the context of particles, as it is the energy possessed by an object due to its motion.

What can be inferred about the kinetic energy of particles at low temperatures?

• Particles have maximum kinetic energy

• Particles have sufficient kinetic energy to move rapidly

• Particles do not have enough kinetic energy

• Particles convert kinetic energy to potential energy

Answer explanation

Particles do not have enough kinetic energy

Match the following descriptions of solute behavior in a solvent with the correct interaction.

• What happens when solute particles do not chemically react or interact with solvent particles?

• They separate and form layers.

• What happens when solute particles affect the arrangement or behavior of solvent particles?

• They interfere with the solvent particles.

• What happens when solute particles do not mix but instead form distinct layers with the solvent?

• They facilitate the formation of new compounds.

• What happens when solute particles react with solvent particles to form new compounds?

• They dissolve completely without any interaction.

Answer explanation

They interfere with the solvent particles.

How do solute particles behave in the presence of solvent particles? They (a)   .

• They bond permanently with solvent
• They act like a "third wheel" in th
• They enhance the solvent's properti
• They evaporate leaving the solvent

Answer explanation

Solute particles behave like a 'third wheel' in the presence of solvent particles, interfering with the interactions between solvent particles.

What happens when polar solvent molecules interact with polar solute molecules?

• They repel each other due to similar charges.

• They form covalent bonds.

• They are attracted to each other and then pulled apart.

• They undergo a redox reaction.

Answer explanation

When polar solvent molecules interact with polar solute molecules, they are attracted to each other and then pulled apart.