formulations, pure and impure substances
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10 Terms
Pure substance=
A single element or compound, made up of only type of substance
Impure substance=
A mixture of substances
Melting point=
Temperature at which solid turns to liquid
Boiling point=
Temperature at which liquid turns to gas
Formulation
A mixture designed for a specific purpose, and has set proportions
Melting and boiling point of pure substances
Sharp (exact)
E.g. pure water b.p=100 and m.p=0
Melting and boiling point of impure substance
Melt and boil over a range of temperatures
Impurities decrease the melting point and increase boiling point
What do formulations have
Set proportions of each part of a mixture to ensure it has the desired properties
Examples of formulations
Paint
Cosmetics
Fertilisers
Medicine
Graph of an impure substance
No flat lines
Note 
Flashcards (77)