Purity and formulations

• Pure substance


  A substance that is not mixed with any other substance
• A pure substance melts at a specific fixed temperature
• A pure substance also has a specific fixed boiling point
• Impure substances melt and boil over a range of temperatures
• Formulations


  A complex mixture that has been designed as a useful product
• In a formulation, the quantity of each component is carefully measured</b>
• Formulations include fuels, cleaning products, paints, medicines, alloys, fertilisers, and food
• Temperature (c)
• A pure substance is not mixed with any other substance
• Impure substances melt and boil over a range of temperatures, which means it's not pure