Mixtures

Question 1

concentrated

Answer 1

Having a high concentration

A concentrated solution has a lot of solute compared to the amount of solvent.

Question 2

concentration

Answer 2

The amount of solute dissolved in a certain amount of a solution

A solution with a small proportion of solute compared to solvent has a low concentration and is dilute.

Question 3

dilute

Answer 3

Having a low concentration

A dilute solution has a small amount of solute compared to the amount of solvent.

Question 4

solute

Answer 4

A substance that dissolves in another substance

Colloids are an example of mixtures that are cloudy.

Question 5

solution

Answer 5

A type of mixture made of one substance dissolved in another

Solutions are transparent because the dissolved particles are so tiny that they do not scatter light.

Question 6

solvent

Answer 6

A substance that another substance dissolves in

Water is an example of a solvent. Solutes, such as jelly crystals, dissolve in it to form solutions.

Question 7

unsaturated

Answer 7

Able to dissolve more solute

To increase the concentration of an unsaturated solution, either add more solute or remove some solvent.

Question 8

evaporation

Answer 8

A change of state from liquid to gas

Evaporating the solvent from a solution increases the concentration of the solute.

Question 9

insoluble

Answer 9

Unable to be dissolved

Sand is insoluble in water. When sand and water are mixed, they form a suspension.

Question 10

mixture

Answer 10

A combination of substances that can be physically separated

The three types of mixture are suspensions, colloids and solutions

Question 11

particle

Answer 11

A solid fragment, liquid droplet or gas bubble

Particle size helps to determine if a mixture will separate into its components or stay mixed.

Question 12

saturated

Answer 12

Unable to dissolve any more solute

When a solution is saturated, any more added solute will sink to the bottom as sediment.

Question 13

pure substance

Answer 13

A substance that is made up of only one type of stuff

Examples of pure substances include purified water, oxygen, gold and table salt.

Question 14

sediment

Answer 14

Solid particles that have settled out of a suspension

Sediment settles when there is not enough motion to keep the particles held up.

Question 15

soluble

Answer 15

Able to be dissolved

Sugar is soluble in water. When sugar dissolves in water it forms a solution.

Question 16

suspension

Answer 16

A type of mixture with suspended particles that settle and separate over time

Motion is required to keep the components of a suspension mixed together.

Question 17

liquid

Answer 17

A substance with a fixed volume that flows and changes shape

Liquids take the shape of the bottom of their container.

Question 18

gas

Answer 18

A substance with no fixed shape or volume

Gases expand to fill a container. Examples include oxygen and water vapour.

Question 19

colloid

Answer 19

A type of mixture with suspended particles that do not separate on their own

The particles in a colloid scatter light, making the mixture cloudy instead of transparent.

Question 20

emulsion

Answer 20

A mixture where liquid droplets are suspended in another liquid

Butter is an emulsion made up of water droplets mixed in oil.