Elements compounds and mixtures

What is a element

Substance made of only one type of atom

What is a compound

A substance made of two or more atoms that are chemically bonded

What is a mixture

A mixture of two or more compounds not chemically bonded together

What is simple distillation used for

Sepereting a solvent from a solution eg separating water from a salt solution

How does simple distillation work

The solvent evaporated moves away is cooled and then condensed

What is fractional distillation used for

Seperating a pure liquid from a mixture of liquids with different boiling points

How does fractional distillation work

The oil is heated evaporates condenses at different temperatures and is collected as fractions

What is crystallisation used for

Separating a soluble solid from a solution by evaporating the solvent and allowing crystals to form

What is paper chromatography used for

Separating mixtures and identifying there movement on a solvent paper

RF VALUE

Distance moved by substance/ distance moved by solvents