Chapter 20 BD

What is a solution made up of?

• A solute dissolved in a solvent

• Only a solute

• Only a solvent

• Two solvents mixed together

Which of the following is almost always the solvent in foods?

• Water

• Salt

• Sugar

• Oil

What is the formula to calculate the mass percent of a solute in a solution?

• (mass of solute A * 100) / total mass of the solution

• (total mass of the solution * 100) / mass of solute A

• (mass of solute A + total mass of the solution) / 100

• (mass of solute A - total mass of the solution) * 100

What is an unsaturated solution?

• A solution that contains less solute than can be dissolved at a given temperature

• A solution that contains all the solute that can be dissolved at a given temperature

• A solution with no solute

• A solution with only solid solutes

If a solution contains all the solute that can be dissolved at a given temperature, what is it called?

• Saturated

• Unsaturated

• Dilute

• Concentrated

Explain how temperature can affect what happens when different solutes are added to a liquid.

• Temperature can change how much solute dissolves in the solvent.

• Temperature has no effect on solubility.

• Temperature only affects the color of the solution.

• Temperature only affects the solvent, not the solute.

What happens to the solubility of most solids dissolved in a liquid as the temperature increases?

• It decreases

• It stays the same

• It increases

• It disappears

Which of the following best describes a supersaturated solution?

• A solution with less solute than it can hold at that temperature

• A solution with no solute

• A solution that contains more dissolved solute than it would normally have at that temperature

• A solution that is only partially mixed

How does the amount of solute in a solution affect its boiling and freezing points?

• More solute lowers the boiling point and raises the freezing point

• More solute raises the boiling point and lowers the freezing point

• More solute has no effect on boiling or freezing points

• More solute raises both the boiling and freezing points

If a warm can of soda goes flat faster than a cold can, what does this demonstrate about solubility?

• Solubility is not affected by temperature

• Solubility decreases as temperature increases

• Solubility of gases in liquids decreases as temperature increases

• Solubility of solids in liquids decreases as temperature increases