Solvation and Dissociation

What factors affect dissolving rates?

• mass

• volume

• temperature

• surface area

• stirring/shaking

Tags

NGSS.HS-PS1-5

Suppose you put equal amounts of pure water and salt water into separate ice cube trays of the same size and shape. When you put both trays in the freezer, what would you expect to happen?

• The pure water would freeze faster than the salt water because the salt would lower the freezing point of the water.

• The salt water would freeze faster than the pure water because the salt raises the freezing point of the water.

• They would freeze at the same rate because the addition of a solute doesn't change the freezing point of water.

• The pure water would freeze and the salt water would not.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The parts of a solution are the

• salt and vapor.

• solvent and solid.

• solute and water.

• solvent and solute.

Ionic compounds produce ions in solution by

• ionization.

• dissociation.

• evaporation.

• dispersion.

The process by which some molecular compounds dissolve in water to form ions is

• ionization.

• dissociation.

• neutralization.

• dispersion.

The boiling point of a liquid solution is

• the same as the boiling point of the solvent.

• the same as the boiling point of the solute.

• higher than the boiling point of the solvent.

• lower than the boiling point of the solvent.

Which of the following will NOT increase the rate at which a solute dissolves in a solvent?

• Increasing the surface area of the solute

• Stirring the solvent

• Increasing the temperature

• Increasing the particle size of the solute

Which of the following is not one of the three (3) physical properties of a solution that differs from those of its solutes and solvent?

• Boiling point

• Melting point

• Freezing point

• Conductivity

Heating a solvent _______ the energy of its particles, making them move faster on average, and ________ the rate at which a solid solute can dissolve in the solvent.

• increases, increases

• increases, decreases

• decreases, decreases

• decreases, increases

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Polarity of a solvent can best be described as:

• ionized H₃O⁺ molecules

• like dissolves like

• increased polarity increases the rate a solute dissolves in a solvent