Pure Substances and Mixtures Science Quiz Study Sheet

What is chemistry?

Chemistry is the study of matter and changes in matter.

When is a solution saturated?

A solution is saturated when it has dissolved the maximum amount of solute.

How can you tell a solution is saturated?

You can tell it is saturated when additional solute will not dissolve in the solvent at a given temperature.

What are the five points of particle theory?

1. All matter is made up of tiny particles

2. The particles are always moving

3. There is space between all particles

4. Adding heat makes particles move faster

5. All particles in pure substance are the same. Different substances are made up of different particles.
   

What is particle theory?

Particle theory is an explanation of why matter behaves the way it does

What can increase the rate at which a solute dissolves?

You can increase the rate by stirring the mixture or increasing the temperature.

What is a mixture?

A mixture is a type of substance that contains more than one kind of particle.

Examples of mixtures?

Coffee, saltwater, cookie dough, and soil.

Define homogeneous mixture.

A uniform mixture made up of 2 or more pure substances.

Define heterogeneous mixture.

A mixture where the composition is not uniform.

Define pure substance.

Any liquid, solid, or gas that only contains one type of particle throughout.

What is a mechanical mixture?

A type of mixture where the different substances keep their individual properties and can be easily separated.

What is the universal solvent?

Water is the universal solvent because it can dissolve more substances than any other liquid.