Exploring Mixtures and Solutions

What is a mixture?

• A single pure substance

• A combination of two or more substances

• A chemical reaction

• A type of element

Which of the following is an example of a solution?

• Sand in water

• Salt dissolved in water

• Oil and water

• Iron filings in sand

What property of a solution determines how much solute can dissolve in a solvent?

• Density

• Solubility

• Viscosity

• Conductivity

Which of the following is a method to separate a solid from a liquid?

• Filtration

• Evaporation

• Distillation

• All of the above

Why does oil float on water?

• Oil is denser than water

• Oil is less dense than water

• Oil is heavier than water

• Oil is a solid

How can you increase the solubility of a solid in a liquid?

• Decrease the temperature

• Increase the temperature

• Add more solute

• Stir less

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following mixtures can be separated by using a magnet?

• Salt and water

• Sand and iron filings

• Oil and water

• Sugar and water

What happens when you mix vinegar and oil?

• They form a solution

• They separate into layers

• They react chemically

• They become a solid

Explain why sugar dissolves in water but sand does not.

• Sugar is a liquid

• Sugar molecules interact with water molecules

• Sand is lighter than water

• Sand is a liquid

How can you separate a mixture of oil and water?

• Use a magnet

• Use a filter

• Use a separating funnel

• Use a sieve