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Elements Compounds and Mixtures

Element- A pure substance, it’s not a mixture.

Mixtures are made with two or more substances that are not chemically combined.

Compounds are made with two or more substances that are chemically combined

Separating Mixtures

Filtration- Separate an insoluble solid from a liquid.

Evaporation- Separates soluble solids from it’s solution (liquid) to make crystals.

Simple Distillation-Separates liquid from a solution with different boiling temperatures. (e.g salt and water)

Fractional Distillation- Separates liquid with different boiling points.

Paper Chromatography- Chromatography can be used to separate mixtures of coloured compounds. (e.g inks).

Differences between Chemical and Physical Change

Chemical Change

Physical Change

Easy to reverse?

Irreversible

Reversible

Substances

New substances are formed

No new substances

Energy Change?

Either exothermic or endothermic

No

Colour Change?

can result in change of colour

No

Change of state?

can have a change of state

Usaully change of sate

SB

Elements Compounds and Mixtures

Element- A pure substance, it’s not a mixture.

Mixtures are made with two or more substances that are not chemically combined.

Compounds are made with two or more substances that are chemically combined

Separating Mixtures

Filtration- Separate an insoluble solid from a liquid.

Evaporation- Separates soluble solids from it’s solution (liquid) to make crystals.

Simple Distillation-Separates liquid from a solution with different boiling temperatures. (e.g salt and water)

Fractional Distillation- Separates liquid with different boiling points.

Paper Chromatography- Chromatography can be used to separate mixtures of coloured compounds. (e.g inks).

Differences between Chemical and Physical Change

Chemical Change

Physical Change

Easy to reverse?

Irreversible

Reversible

Substances

New substances are formed

No new substances

Energy Change?

Either exothermic or endothermic

No

Colour Change?

can result in change of colour

No

Change of state?

can have a change of state

Usaully change of sate