Chemistry- More separation techniques (year 9)

Question 1

What does filtration do?

Answer 1

It separates insoluble solids from liquids

Question 2

What can filtration be used for?

Answer 2

if your product is an insoluble solid that needs to be separated from a liquid reaction mixture

Question 3

What else can filtration be used in?

Answer 3

Purification

Question 4

What equipment can be used during filtration?

Answer 4

Filter paper that is folded into a cone shape with the solid that is left in the filter paper

Question 5

What is soluble?

Answer 5

if a solid can be dissolved

Question 6

what 2 methods can be used to separate a soluble salt from a solution?

Answer 6

evaporation and crystalisation

Question 7

What is the step by step method on how to do evaporation?

Answer 7

1) pour the solution into a evaporating dish
2) slowly heat the solution, the solvent will evaporate and the solution will get more concentrated
3) then crystals will start to form

Question 8

How is evaporation a really quick method?

Answer 8

because it is used for separating a soluble salt from a solution, you can only use it if the salt does not break down otherwise you will use crystalisation instead

Question 9

What is the step by step method on how to do crystalisation?

Answer 9

1)Pour the solution into an evaporating dish and gently heat the solution. Some of the solvent will evaporate and the solution will get more concentrated.
2) When crystals start to form, remove the dish from the heat and leave to cool.

Question 10

How is distillation used?

Answer 10

to separate mixtures which contain liquids

Question 11

What are 2 types of distillation?

Answer 11

simple and fractional