Understanding Mixtures and Solutions

What is a key characteristic of a mixture?

• It always forms a new compound.

• It is a physical combination of substances.

• Each substance loses its individual characteristics.

• It is a chemical combination of substances.

What is the main difference between homogeneous and heterogeneous mixtures?

• Homogeneous mixtures have larger particles.

• Heterogeneous mixtures are always transparent.

• Heterogeneous mixtures have uniformly distributed particles.

• Homogeneous mixtures have uniformly distributed particles.

Why is water often called the universal solvent?

• It can only dissolve organic compounds.

• It is a non-polar solvent.

• It can dissolve more substances than any other liquid.

• It is the only solvent that can dissolve ionic compounds.

What is the role of a solute in a solution?

• It is the gas that evaporates from the solution.

• It is the liquid that dissolves other substances.

• It is the substance that dissolves the solvent.

• It is the substance that is dissolved by the solvent.

How do water molecules interact with ionic compounds?

• They repel the ions, preventing dissolution.

• They form covalent bonds with the ions.

• They only interact with non-polar molecules.

• They surround and separate the ions into positive and negative charges.

What is a characteristic of solutions?

• They are always opaque.

• They have large, visible particles.

• They are transparent and have uniformly distributed solutes.

• They cannot dissolve ionic compounds.

What distinguishes colloids from suspensions?

• Colloids are always transparent.

• Colloids have larger particles than suspensions.

• Suspensions have particles smaller than water molecules.

• Suspensions have particles that settle over time.

Which of the following is an example of a colloid?

• Milk

• Oil and water

• Sand in water

• Saltwater

What happens to the particles in a suspension over time?

• They dissolve completely.

• They remain evenly distributed.

• They become smaller and invisible.

• They settle to the bottom of the container.

What is a key feature of aqueous solutions?

• They are always heterogeneous.

• They consist of tiny ions or molecules dissolved in water.

• They cannot dissolve salts.

• They are always opaque.