Pure Substance Check In #2

When you put sugar in water, it...

• ...dissolves.

• ...melts.

• ...evaporates.

When a solute dissolves in the solvent where do the solute particles go?

• They go in between the particles of the solvent.

• They just sink to the bottom.

• They evaporate and leave the mixture.

• They join with the solvent particles.

Why EXACTLY will rocks not dissolve in water?

• Rocks are a solid because the particles are so close together.

• The rock particles are more attracted to themselves than the water particles.

• They are too hard.

• Rocks are not a pure substance.

In a homogenous mixture, there tends to be more...

• ...solute.

• ...solvent.

What is the universal solvent?

• Water

• Oil

• Ethanol

• Mountain Dew Baja Blast

Name the type of mixture: 10L of milk, 0.5 ml of chocolate milk mix.

• Dilute

• Concentrated

• Saturated

• Super Saturated

Name the type of mixture: I added salt to water and the salt stopped dissolving.

• Dilute

• Concentrated

• Saturated

• Super Saturated

A hot solvent will dissolve more solutes because....

(Select all the correct answers)

• The solvent particles are closer together.

• The solvent particles are moving faster.

• The heat makes the solute stronger.

• The solvent particles are more attracted to the solute.

• The solvent particles are farther apart.

In a concentrated solution...

• ...solutes fill some of the available spaces.

• ...solutes will fill most of the available spaces.

• ....solutes will fill all of the available spaces.

Name the type of heat transfer:

Heat is transferred from one substance to another through direct physical contact.

• Conduction

• Convection

• Radiation