Purity, Formulations & Chromatography (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Chemical definition of pure substance
Chemical definition of pure substance
Contains only one type of compound or element
Chemically pure water composition
Chemically pure water composition
Only molecules, nothing else mixed in
Everyday meaning of 'pure'
Everyday meaning of 'pure'
Free from dirt or unwanted substances
Two methods to test purity
Two methods to test purity
Melting point analysis and boiling point analysis
Method to test purity of solids
Method to test purity of solids
Melting point analysis
Method to test purity of liquids
Method to test purity of liquids
Boiling point analysis
Equipment used in melting point analysis
Equipment used in melting point analysis
Capillary tube
Melting behaviour of pure substance
Melting behaviour of pure substance
Melts exactly at its melting point
Melting point: impure vs pure substance
Melting point: impure vs pure substance
Impure melts at lower temperature
Melting pattern of impure substance
Melting pattern of impure substance
Over a range of temperatures, not a single point
Boiling behaviour of pure liquid
Boiling behaviour of pure liquid
Boils exactly at its boiling point
Boiling point: impure vs pure liquid
Boiling point: impure vs pure liquid
Impure boils at higher temperature
Boiling pattern of impure liquid
Boiling pattern of impure liquid
Over a range of temperatures
Definition of formulations
Definition of formulations
Purposeful mixtures
Example of a formulation
Example of a formulation
Pain relief tablet with measured ingredients