Unit 3 Review

What is a solute?

• A solute is a substance that is dissolved in a solvent.
• A solute is a gas that cannot dissolve in liquids.
• A solute is a mixture of substances.
• A solute is a type of solvent.

What is a solvent?

• A solvent is a type of chemical reaction.
• A solvent is a substance that dissolves a solute to form a solution.
• A solvent is a mixture of two or more substances.
• A solvent is a solid that cannot dissolve in liquids.

Which of the following correctly identifies the solvent and solute in the example?

• 1. Water is the solvent, and sugar is the solute. 

• 1. Sugar is the solvent, and water is the solute. 

• 1. Water and sugar are both solvents; the finished solution is the solute. 

• 1. Water and sugar are both solutes; the finished solution is the solvent.

Tags

NGSS.MS-PS1-2

What are 3 factors that affect the rate of dissolution?

• Surface Area

• Temperature

• Color

• Agitation

Tags

NGSS.MS-PS1-4

What does "Rate of Dissolution" mean?

• The rate of dissolution is the pressure applied to a solvent.
• The rate of dissolution is the speed at which a solute dissolves in a solvent.
• The rate of dissolution refers to the amount of solute in a solution.
• The rate of dissolution is the temperature at which a solute can no longer dissolve.

3. 20 g of salt are dissolved into a beaker containing 50 mL of water at room temperature. How could the saltwater solution be diluted? 

• The solution cannot be diluted. 

• To dilute the solution, add more salt and water in the original proportion. 

• To dilute the solution, add more salt.

• To dilute the solution, add more water.

Which solution below is the MOST concentrated?

Solution A: 50g of Salt in 50mL of Water

Solution B: 20g of Salt in 50mL of Water

Solution C: 50g of Salt in 20mL of Water

Solution D: 20g of Salt in 20mL of Water

• A

• B

• C

• D

If I wanted to INCREASE the rate of dissolution, I could...

• Lower the Temperature

• Stir the Solution quickly

• Increase the Temperature

• Crush the substance into a powder to increase the surface area

As Concentration increases, Dilution _______.

• Decreases

• Increases

• Is unchanged

What is a Saturated Solution?

• A saturated solution is one that contains the maximum concentration of solute that can be dissolved at a specific temperature and pressure.
• A saturated solution is one that contains only pure solvent without any solute.
• A saturated solution is one that has no solute dissolved in it.
• A saturated solution is one that can dissolve any amount of solute regardless of temperature.