Pure Substance & Mixtures

What does a pure substance contain?

Pure substances contains one substance only

All its particles are the same

It’s not mixed with anything else

What does a mixture contain?

Mixtures contain two or more substances.

The particles of the different substances are not joined together

Physical reaction is used to separate mixtures

The substances in the mixture keep their own properties—they are not lost

What is a compound?

A compound is a substance made of one more different types of atoms that are chemically joined together

Chemical reaction is used to separate

Compounds have different properties to the elements that made them

Difference between pure and impure substance

Pure:
A substance is pure if it has no other substances mixed with it

Impure:
A substance is impure if it has different substances mixed with it