Solutions Assessment

Which type of solution contains a solute amount that is less than its solubility at a given temperature and volume?

• Saturated solution

• Unsaturated solution

• Supersaturated solution

• Concentrated solution

What is the defining characteristic of a gaseous solution?

• The solvent is a liquid

• The solute is always a gas

• The solvent is a gas

• The solution must contain air

In a liquid solution, which combination is NOT possible?

• Gas solute in liquid solvent

• Liquid solute in liquid solvent

• Gas solvent in liquid solute

• Solid solute in liquid solvent

What happens during the crystallization of a supersaturated solution?

• The solution becomes more concentrated

• The temperature increases

• The excess solute precipitates out

• The solution becomes unsaturated

Which example correctly represents a solid solution?

• Salt water

• Carbonated drinks

• Brass (zinc in copper)

• Water vapor in air

What is an aliquot?

• A. A concentrated solution

• B. A portion of the stock solution

• C. A supersaturated solution

• D. A diluted final product

Which statement about concentrated solutions is correct?

• They always have a molarity less than 1M

• They cannot be diluted

• They emit fumes when highly concentrated

• They are always supersaturated

What is an example of a gas-liquid solution?

• Brass

• Air

What is the primary factor that determines whether substances will mix easily in a solution?

• Temperature of the solution

• Compatible intermolecular forces of attraction

• Pressure of the system

• Volume of the solvent

In the solution formation process, which of the following is TRUE about the heat of solution (ΔHmixing)?

• It is always negative

• It is always positive

• It equals ΔH1 minus ΔH2

• It is the sum of all enthalpy changes in the process