C1.3 - Separating mixtures Flashcards Preview

GCSE Chemistry Required Practicals > C1.3 - Separating mixtures > Flashcards

Flashcards in C1.3 - Separating mixtures Deck (20):
1

The 1st step in evaporation

The 1st step in evaporation is to pour the solution into an evaporating dish

2

The 2nd step in evaporation

The 2nd step in evaporation is to:
1. Slowly heat the solution
2. The solvent will evaporate and the solution will get more concentrated
3. Eventually, crystals will start to form

3

The 3rd step in evaporation

The 3rd step in evaporation is to keep heating the evaporating dish until all you have left are dry crystals

4

The 1st step in crystallisation

The 1st step in crystallisation is to:
1. Pour the solution into an evaporating dish and gently heat the solution
2. Some of the solvent will evaporate and the solution will get more concentrated

5

The 2nd step in crystallisation

The 2nd step in crystallisation is that:
1. Once some of the solvent has evaporated
OR,
2. The solution reaches the point of crystallisation,
remove the dish from the heat and leave the solution to cool

6

The 3rd step in crystallisation

The 3rd step in crystallisation is that:
1. The rest of the solvent will evaporate off at room temperature
2. The salt should start to form crystals as it becomes insoluble in the cold, highly concentrated solution

7

The 4th step in crystallisation

The 4th step in crystallisation is to filter the crystals out of the solution and leave them in a warm place to dry

8

The 1st step in separating rock salt

The 1st step in separating rock salt is grinding:
Grind the mixture to make sure the salt crystals are small, so will dissolve easily

9

The 2nd step in separating rock salt

The 2nd step in separating rock salt is dissolving:
1. Put the mixture in water and stir
2. The salt will dissolve, but the sand won't

10

The 3rd step in separating rock salt

The 3rd step in separating rock salt is filtering:
1. Filter the mixture
2. The grains of sand won't fit through the tiny holes in the filter paper, so they collect on the paper instead
3. The salt passes through the filter paper as it's part of the solution

11

The 4th step in separating rock salt

The 4th step in separating rock salt is evaporation:
Evaporate the water from the salt so that it forms dry crystals

12

The 1st step in simple distillation

The 1st step in simple distillation is that:
A solution is heated and boiled to evaporate the solvent

13

The 2nd step in simple distillation

The 2nd step in simple distillation is that:
The vapour given off then enters a condenser

14

The 3rd step in simple distillation

The 3rd step in simple distillation is that:
1. In the condenser, the hot vapour is cooled and condensed back into a liquid for collection in a receiving vessel
2. Any dissolved solids will remain in the heated flask

15

The 3rd step in crystallisation is that the rest of the solvent will evaporate off at room temperature and the salt should start to form crystals as it becomes insoluble in the cold, highly concentrated solution.
What could you use to give a large surface area for the solvent to evaporate from?

You could use a:
1. Flat-bottomed crystallisation dish
Or,
2. Petri dish
to give a large surface area for the solvent to evaporate from

16

The 4th step in crystallisation is to filter the crystals out of the solution and leave them in a warm place to dry.
What could you also use?

You could also use a:
1. Drying oven
Or,
2. Desiccator

17

The 2nd step in separating rock salt is dissolving:
1. Put the mixture in water and stir.
2. The salt will dissolve, but the sand won't.
What can you do to help dissolve the salt?

You can heat the mixture to help dissolve the salt

18

The 4th step in separating rock salt is evaporation:
Evaporate the water from the salt so that it forms dry crystals.
What could you also use here, if you wanted to make big crystals?

You could also use crystallisation here, if you wanted to make big crystals

19

The method of filtration

The method of filtration is that filter paper is folded into a cone shape

20

The method of filtration is that filter paper is folded into a cone shape.
What happens to the solid?

The solid is left in the filter paper