Pure substances and formulations (AQA GCSE Chemistry): Flashcards
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What is a pure substance?
What is a pure substance?
Contains only one type of material (element or compound)
What types of materials can be pure substances?
What types of materials can be pure substances?
A single element or a single compound
At what temperatures do pure substances melt and boil?
At what temperatures do pure substances melt and boil?
At exact temperatures (specific points)
What test checks if a substance is pure?
What test checks if a substance is pure?
Melting point test
How does a pure substance melt?
How does a pure substance melt?
Sharp melting point at one specific temperature
How does a mixture melt?
How does a mixture melt?
Melts over a range of temperatures
What effect do impurities have on melting point?
What effect do impurities have on melting point?
Cause melting over a range of temperatures
What does 'pure' mean in science?
What does 'pure' mean in science?
Single element or compound with nothing else mixed in
What does 'pure' mean in everyday life?
What does 'pure' mean in everyday life?
Natural or nothing artificial added
What is a formulation?
What is a formulation?
Specially designed mixture where each ingredient has a job
What are the key features of formulations?
What are the key features of formulations?
Each has a specific job, measured amounts, mixed for a purpose
Examples of formulations
Examples of formulations
Paints, medicines, fuels, cleaning products, foods
What are the components of paint as a formulation?
What are the components of paint as a formulation?
Pigments (colour), binders (stick), solvents
How do separation methods work?
How do separation methods work?
Use different physical properties of substances