C2.1.4 - Filtration And Crystallisation Flashcards Preview

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Flashcards in C2.1.4 - Filtration And Crystallisation Deck (19):
1

What forms when a substance dissolves in another substance?

A solution

2

What is the substance that dissolves?

Solute

3

What is the substance that the other substance dissolves in?

Solvent

4

What happens to a substance’s particles when it dissolves?

Its particles separate and mix with particles of the solvent

5

Define ‘soluble’ and ‘insoluble’

Soluble - A substance that can be dissolved
Insoluble - A substance that can’t be dissolved

6

What does filtration do?

Filtration separates an insoluble substance in the solid state from a liquid state

7

How does filtration work?

Since filter paper has very small microscopic holes, the water molecules are small enough to pass through while the solid particles aren’t.

8

Can you filter a solute and a liquid?

No, because the solute’s particles will be small enough to go through the filter paper

9

What is the residue?

The left over solid particles that couldn’t get through the filter paper

10

What is the filtrate?

The filtrate is the left over liquid particles that went through the filter paper

11

Name all the key terms during a filtration experiment

Conical flask
Funnel
Residue
Filter paper
Filtrate

12

What happens if you heat a solution?

The solution evaporates while the solute stays behind

13

What happens if you heat solutions strongly?

Powder

14

What happens if you heat a solution slowly?

Crystals begin to form

15

When do you stop beating the solution during crystallisation?

When it becomes a saturated solution

16

When does a solution become saturated?

When no more solute can be dissolved at that temperature

17

When will crystals start forming?

When the solution becomes saturated

18

What happens when the solution cools?

The solubility decreases

19

How do you separate the crystals from the solution?

Filtration