Chemistry Matters: Solutions, Mixtures, and Solubility

What type of mixture is coffee with cream?

• Pure substance

• Homogeneous mixture

• Heterogeneous mixture

• Elemental mixture

What is the main difference between a homogeneous and a heterogeneous mixture?

• Homogeneous mixtures are always liquids

• Heterogeneous mixtures have visibly distinct parts

• Heterogeneous mixtures are always solids

• Homogeneous mixtures cannot be separated

What is the primary focus of Unit 7 in 'Chemistry Matters'?

• Physical Chemistry

• Organic Chemistry

• Solutions, Acids, and Bases

• Quantum Mechanics

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

In a solution, what is the role of the solvent?

• To decrease the pressure

• To increase the temperature

• To dissolve the solute

• To be dissolved

Why do ionic compounds like salt dissolve into ions?

• Because they are ionic

• Because they are molecular

• Because they are covalent

• Because they increase temperature

Tags

NGSS.HS-PS1-5

What can increase the rate of dissolution in a solution?

• Decreasing the contact

• Decreasing the temperature

• Stirring the solution

• Using larger solute particles

What role does stirring play in the formation of solutions?

• It increases the frequency of contact between particles

• It has no effect

• It changes the chemical properties

• It decreases the rate of dissolution

What is the primary component of milk that acts as a solvent in chocolate milk?

• Protein

• Fat

• Water

• Calcium

How does increasing the temperature affect the solubility of a solute?

• Reduces collisions between particles

• Decreases kinetic energy

• Increases the number of collisions

• None of the above

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the effect of pressure on the solubility of gases in liquids?

• Higher pressure increases solubility

• Pressure only affects solids

• Lower pressure increases solubility

• Pressure has no effect