8.1 Formation of Solutions

What are three ways that substances can dissolve in water?

• dissociation

• melting

• dispersion

• ionization

• suspension

What physical properties of a solution differ from those of its solutes and solvent?

• boiling point

• density

• conductivity

• mass

• melting point

How does the formation of a solution involve energy?

• There is no energy involved in the formation of a solution.

• Energy is required to break the bonds between solutes and the bonds between solvents.

• Energy must be injected at the right time for the solution to form.

• Energy is released or absorbed as new attractions form between the solute and solvent.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

The parts of a solution are the

• salt and vapor.

• solvent and solid.

• solute and water.

• solvent and solute.

In a solution, the solute is the substance that

• dissolves in the solvent.

• is in the greatest quantity.

• is the liquid.

• is the solid.

Sugar dissolves in water through

• ionization.

• dissociation.

• neutralization.

• dispersion.

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.