Pure Substances (AQA GCSE Chemistry Combined Science): Flashcards
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Chemical definition of pure substance
Chemical definition of pure substance
Contains only one type of compound or element
What chemically pure water contains
What chemically pure water contains
molecules only, nothing else
Two methods to test purity of substances
Two methods to test purity of substances
Melting point analysis and boiling point analysis
What melting point analysis is used to test
What melting point analysis is used to test
Purity of solids
Tube used in melting point analysis
Tube used in melting point analysis
Capillary tube
Melting behavior of pure solid
Melting behavior of pure solid
Melts at sharp, fixed temperature (its melting point)
Temperature impure solid melts at compared to pure
Temperature impure solid melts at compared to pure
Lower temperature
How impure substance melts (temperature pattern)
How impure substance melts (temperature pattern)
Over a range of temperatures, not a single point
Boiling behavior of pure liquid
Boiling behavior of pure liquid
Boils at sharp, fixed temperature (its boiling point)
Temperature impure liquid boils at compared to pure
Temperature impure liquid boils at compared to pure
Higher temperature
How impure liquid boils (temperature pattern)
How impure liquid boils (temperature pattern)
Over a range of temperatures
Definition of formulations
Definition of formulations
Mixtures designed for a specific purpose