1. Learning Objective Describe a pure substance and a formulation
To be able to:
Describe a pure substance and a formulation
Key Words:
Formulation, pure, mixture

2. Pure Substances and Formulations
Tuesday, 28 May 2019
Pure Substances and Formulations
Date and title in books. You need a pen, pencil & ruler.
Starter Activity – 5 minutes
Exam question

3. Learning Outcomes Define a pure substance Define a formulation
Target 9-1
Define a pure substance
Define a formulation
(F/H)
Target 4-9
Describe a chemically pure substance
Describe a formulation
(H)
Target 5-9
Explain how we can tell the difference between pure substances and formulations
Extension: Application of Knowledge
Target 8/9
Evaluate the uses for formulations, explaining why they may be more useful than a pure substance
Learning Outcomes

4. Pure Substances
Definition: a pure substance is a single element or compound, not mixed with any other substance Can you name any pure substances?

5. Formulations
Definition: A formulation is a mixture that has been designed as a useful product.
Can you think of any formulations?
fuels,
cleaning agents,
paints,
medicines,
alloys,
Fertilisers
Foods

6. Identifying a Substance
Pure elements and compounds melt and boil at specific temperatures.
Melting point and boiling point data can be used to distinguish pure substances from mixtures/formulations.

7. Water vs Salt Water Practical – heating water and heating salt water.
What did you find out about the boiling point?