Organic chemistry-Purity and formulations

what is a pure substance

A single element or compound that is not mixed with any other substances

Examples of pure substances

oxygen, sodium chloride and water

What are specific about pure substances?

They have specific and fixed boiling and melting points.

What is the boiling point for water

100 degrees celcius

What are formulations

mixtures designed to be useful products

Example of formulations

fuels, medicines, fertilisers

What do impure substances have?

A range of temperatures

A pure substance contains only one element or compound . Tick the substances that are pure

Describe how you can tell if water is pure or not 

Heat until it boils Measure the boiling point Boils at 100 degrees celcius 

name a process that can be used to obtain pure water from a sample of sea water

distillation

what is distillation

a cool way to separate mixtures which have different boiling points