SC2a Mixtures

Question 1

The characteristics of a pure substance

Answer 1

• the composition cannot be changed .
• composition is the same in all parts of a piece of the substance .

Question 2

Differences between a pure substance and a mixture

Answer 2

Mixture contains elements and/or compounds that are not chemically joined together . You can use physical processes to separate mixtures into different substances .

Pure substances have the same fixed composition throughout its parts and so we can’t seperate into other substances using physical methods

Question 3

Example of a substances physical property

Answer 3

It’s melting point