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Year 8 Ms Lee 2020 Flashcards > Separation techniques > Flashcards

Flashcards in Separation techniques Deck (36)
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1

What is an element?

An element is a substance that is made up of only ONE TYPE of atom. E.g. copper is an element because it is made up of millions of copper atoms.

2

What is a mixture?

A mixture is formed when different substances are mingled together but they are not chemically bonded together.

3

When a substance does not dissolve in a solvent it is said to be ______________.

Insoluble

4

When a substances dissolves in a solvent it is said to be _______________.

Soluble

5

Which separation technique separates magnetic materials from non-magnetic materials?

Magnetism

6

Which separation technique separates a soluble solid by boiling off the liquid? e.g. a mixture of salt and water

Evaporation

7

Which separation technique would separate an insoluble solid from a liquid e.g. sand and water?

Filtration

8

Which separation technique separates liquids/inks of different colours?

Paper chromatography

9

Which separation technique separates liquids with different boiling points

Distillation

10

What is filtration used to separate?

Filtration separate insoluble solids from a liquid e.g. sand and water?

11

What is the name of the substance left behind in the funnel after filtration has taken place?

Residue

12

What is the name of the substance that is filtered through the funnel and collected at the end?

Filtrate

13

How does the change of state of liquid to a gas occur?

Evaporation

14

What is a solvent?

A liquid (e.g. water) in which a solute can dissolve to form a solution.

15

What is a solute?

A solute is the substance that dissolves in the solvent.

16

What is a solution?

A mixture of a dissolved solute in a solvent

17

What is a saturated solution?

A saturated solution that contains the maximum amount of solute. No more will dissolve.

18

In general how does temperature affect the solubility of a solute in solvent?

As the temperature increases the solubility of the solute also increases. i.e. more solute will dissolve as the temperature goes up.

19

Which of the particle diagrams A, B, or represents an mixture?

C

20

Which of the particle diagrams A, B, or represents an compound?

B

21

Why does particle diagram represent an element?

Because the substance is made up of only ONE TYPE of atom.

22

Which of the particle diagrams A, B, or represents an element?

A

23

In this case sand is left behind in the filter paper.

What is the name for the insoluble substance (label A) that does not pass through the filter paper?

Residue

24

What type of separation technique is shown by the diagram?

Filtration

25

What is the term used for the liquid that passes through the filter paper (label B)?

Filtrate

26

What is the name of the piece of equipment labelled Y in the diagram?

Bunsen burner

27

What is the name of the piece of equipment labelled in the diagram?

Evaporating dish (or evaporating basin)

28

What is the name of the separation technique shown in the diagram?

Evaporation

29

Why could you not use filtration to separate seawater (i.e. a mixture of water and salt)

Because seawater is a mixture of water and dissolved salt. Both water and salt particles would pass through the filter paper into the filtrate.

30

How many coloured substances are in the purple ink?

There are 2 coloured substances (red and blue) in the purple ink.