chemical analysis- CH12
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27 Terms
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boiling point
impurities lower the
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impurities raise the
melting point
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the purer the compound the
narrower the melting point range
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paint, fuel, alloys, fertilisers
examples of formulations
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Rf value=
distance moved by substance/ distance moved by the solvent
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hydrogen burns with a squeaky pop
lit splint test
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oxygen relights a glowing splint
glowing splint test
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carbon dioxide turns it cloudy
limewater test
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blue litmus paper
chlorine bleaches damp litmus paper white
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lithium+ flame
crimson
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potassium+ flame
lilac
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copper 2+ flame
green
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sodium+ flame
yellow
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calcium 2+ flame
orangey-red
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white precipitate
magnesium 2+ with NaOH
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white precipitate
calcium 2+ with NaOH
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blue precipitate
copper 2+ with NaOH
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green precipitate
iron 2+ with NaOH
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reddy brown precipitate
iron 3+ with NaOH
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white precipitate which dissolves in excess
aluminium 3+ with NaOH
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white precipitate
copper sulphate + barium chloride
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white precipitate
sodium sulphate + barium chloride
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effervescence
potassium carbonate + dilute nitric acid
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yellow precipitate
potassium iodide + silver nitrate
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cream precipitate
potassium bromide + silver nitrate
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white precipitate
potassium chloride + silver nitrate
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flame emission spectroscopy
an instrumental method used to analyse samples for metal ions
Note 
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