Separating Mixtures

Question 0

What is it called when something is made up of 2 or more different particles?

Answer 0

A mixture.

Question 1

What is a pure substance made of?

Answer 1

The same type of particle throughout.

Question 2

What is a solution?

Answer 2

A mixture made up of one substance dissolved into another.

Question 3

What is the substance that dissolves into a solvent called?

Answer 3

Solute

Question 4

What is a solvent?

Answer 4

Usually a liquid which a solute dissolves into.

Question 5

What are solutions in which the solvent is water called?

Answer 5

Aqueous Solutions

Question 6

What is it called when substances are able to dissolve in a particular substance?

Answer 6

Soluble

Question 7

What does insoluble mean?

Answer 7

When a substance is not able to dissolve in a particular solvent.

Question 8

Does a solution form when water is mixed with:
Salt?
Sugar?
Flour?
Coffee?
Copper Sulfate?
Blue Chalk?
Copper Carbonate?

Answer 8

Yes.
Yes.
No.
Yes.
Yes.
No.
No.

Question 9

What is the difference between a dilute solution and a concentrated solution?

Answer 9

A dilute solution has less solute dissolved in it’s solvent than a concentrated solution.

Question 10

What is it called when a solute is no longer able to dissolve in a solvent?

Answer 10

Saturation

Question 11

What is a suspension?

Answer 11

When a insoluble substance is added to a liquid and they separate for a while.

Question 12

What happens after a suspension occurs?

Answer 12

The insoluble substance either sinks to form a sediment, or if it has a low density floats on the surface of the liquid.

Question 13

How does a colloid occur?

Answer 13

When an insoluble substance is mixed with a liquid, the insoluble substance does not spread out.

Question 14

What are 8 ways that can be used to separate mixtures?

Answer 14

• Decanting
• Filtering
• Separating Funnel
• Centrifuging
• Distillation
• Evaporation
• Crystallisation
• Chromotography

Question 15

When is it best to use the separating funnel?

Answer 15

When one substance does not mix with other but floats on top.

Question 16

What is it called when a mixture is spun very quickly so that the heavier substances are forced to the bottom and the lighter substances to the top?

Answer 16

Centrifuging

Question 17

How does distillation work?

Answer 17

When a solution is made up of substances of different boiling points. The solution is boiled and the substance with the lowest boiling point evaporates leaving the other substances behind. The evaporated substance travels down a condenser where it is cooled and condenses back into a liquid form, which in turn is collected. Once the first substance has been evaporated and collected, the temperature is risen so that the next substance with the lowest boiling point is able to evaporate and be collected. This is done until all the different substances have been separated from the solution.

Question 18

Solutions are __________?

Answer 18

Homogenous

Question 19

Suspensions are __________?

Answer 19

Heterogeneous

Question 20

In crystallisation if the mixture is cooled slowly, are the crystals that form large or small?

Answer 20

Large

Question 21

How can blood be separated, and what is it separated into?

Answer 21

1. Centrifuging to separate red and white blood cells (2) with plasma and platelets (3) .
2. Filtration to separate the red blood cells and the white blood cells.
3. Centrifuging to separate the plasma and platelets.

Question 22

What is chromatography?

Answer 22

A separation technique that separates based on a variety of factors such as solubility, charge and size.