Flashcards
analysing substances
Flashcards do conjunto (20)
- 1what 5 positive ions can be detected using flame tests?lithium
potassium
barium
calcium
sodium - 2what colour does a lithium ion give?crimson
- 3what colour flame does barium give?green
- 4what colour does calcium give?red
- 5what substance gives a lilac flame?potassium
- 6what substance gives a yellow flame?sodium
- 7which 3 ions form coloured precipitates when sodium hydroxide is added?iron 2, iron 3 and copper2
- 8what colour ion does iron 2 form?green
- 9what colour precipitate does iron 3 form?brown
- 10what colour precipitate does copper 2 form?blue
- 11what 3 ions form white precipitates?aluminium calcium and magnesium
- 12how do you differentiate between the 3 ions that form a white precipitate with sodium hydroxidemagnesium does naff all
calcium is red on flame test
aluminium dissolves in the excess sodium hydroxide solution - 13how do you differentiate between the 3 ions that form a white precipitate with sodium hydroxidemagnesium does naff all
calcium is red on flame test
aluminium dissolves in the excess sodium hydroxide solution - 14how do you test for a carbonate ion?react it with a dilute acid and it will form co2, test this because it turns limewater cloudy
- 15how do you test for a halide ion?- add dilute nitric acid to the compound
-then add silver nitrate solution - 16if a halide made a WHITE precipitate when reacted with silver nitrate solution and dilute nitric acid, which halide would it be?chloride because silver chloride is white
- 17if a halide made a PALE YELLOW precipitate when reacted with silver nitrate solution and dilute nitric acid, which halide would it be?iodide because silver iodide is yellow
- 18silver bromide is what colour?cream
- 19how do you identify sulfate ions?they produce a white precipitate with barium chloride in the presence of dilute hydrochloric acid
- 20what is a suitable indicator for titration experiments?phenophthalein
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- gcse chemistry FlashCards sobre analysing substances, criado por Ella Wolf em 19-05-2013.
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- Ella Wolf
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