Learning Objective Describe a pure substance and a formulation

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Presentation transcript:

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

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

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

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

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

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.

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