Pure Substances (AQA GCSE Chemistry): Flashcards
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Chemistry definition of a pure substance
Chemistry definition of a pure substance
Contains only one type of compound or element
Composition of chemically pure water
Composition of chemically pure water
Only molecules, nothing else mixed in
Two main methods for testing purity
Two main methods for testing purity
Melting point analysis and boiling point analysis
What melting point analysis tests
What melting point analysis tests
Purity of a solid
Melting behaviour of a pure substance
Melting behaviour of a pure substance
Melts exactly at its melting point
Melting temp of impure vs pure substance
Melting temp of impure vs pure substance
At a lower temperature
Melting pattern of impure substance
Melting pattern of impure substance
Melts over a range of temperatures
What boiling point analysis tests
What boiling point analysis tests
Purity of a liquid
Boiling behaviour of a pure substance
Boiling behaviour of a pure substance
Boils exactly at its boiling point
Boiling temp of impure vs pure substance
Boiling temp of impure vs pure substance
At a higher temperature
Boiling pattern of impure substance
Boiling pattern of impure substance
Boils over a range of temperatures
Definition of a formulation
Definition of a formulation
A mixture designed for a specific purpose
Example of a formulation
Example of a formulation
Pain relief tablet with carefully measured ingredients