Pure substances and formulations (AQA GCSE Chemistry Combined Science): Flashcards
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Pure substance definition
Pure substance definition
Contains only one element or one compound
Melting point of a pure substance
Melting point of a pure substance
Sharp - melts at one exact temperature
Melting point of an impure substance
Melting point of an impure substance
Variable - melts over a range of temperatures
Formulation definition
Formulation definition
Mixture specially designed for a specific job
Key feature of formulation components
Key feature of formulation components
Each serves a specific function or purpose
Examples of formulations
Examples of formulations
Paints, medicines, cleaning products, fuels, fertilisers
Components in paint formulations
Components in paint formulations
Pigments (colour), binders (stick), solvents (spread)
Medicine formulation components
Medicine formulation components
Active ingredients + other substances for absorption
Method to separate mixtures
Method to separate mixtures
Using physical methods
Use of filtration
Use of filtration
Separating solids and liquids
Use of distillation
Use of distillation
Separating liquids with different boiling points
Use of chromatography
Use of chromatography
Separating dissolved substances