Separation techniques

Question 1

Define the word soluble

Answer 1

Able to dissolve in a solvent.

Question 2

Define the word insoluble

Answer 2

Unable to dissolve in a solvent

Question 3

Define the word miscible

Answer 3

Liquids that are able to dissolve in each other and that are therefore harder to separate.

Question 4

Define the word immiscible.

Answer 4

Liquids that are unable to dissolve in each other making them easier to separate.

Question 5

How do you separate sand from water?

Answer 5

By filtration

Question 6

Water is the _______ when filtering water and sand.

Sand is the _______ when filtering water and sand.

Answer 6

1. Filtrate

2. Residue

Question 7

Define the phrase ‘pure substance’.

Answer 7

A single element or compound that us nit mixed with any other substance.

Question 8

Define the phrase ‘impure substance’.

Answer 8

A substance that is made yo of more than one type of element.

Question 9

How do we test the purity of a substance?

Answer 9

By testing its boiling/melting point and seeing if it coincides with what the pure substance should be.

Question 10

How do we separate rock salt?

Answer 10

By dissolving it in water, filtrating it and crystallising it.