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29 Cards in this Set
- Front
- Back
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Water present (2 answers) |
anhydrous copper sulphate goes blue
dried cobalt chloride paper (blue) turns pink |
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pure water
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boils at 100 degrees, freezes at 0 degrees
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lithium
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flame test goes red
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sodium |
flame test goes orange
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potassium
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flame test goes lilac
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calcium
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flame test goes brick red
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How do you perform a flame test?
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dip glass rod in powder of the salt, then hold over roaring bunsen flame
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ammonium (2 answers)
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add sodium hydroxide solution to form ammonia gas
damp red litmus paper goes blue |
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copper (2 answers)
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blue/green flame test
mix a solution of the salt with sodium hydroxide to form a pale blue precipitate |
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iron (2 answers)
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mix a solution of the salt with sodium hydroxide solution to form a...
green precipitate (Fe2+ ions) orange/brown precipitate (Fe3+ ions) |
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chloride
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mix a solution of the salt with nitric acid and then add silver nitrate solution to form a white precipitate
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bromide
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mix a solution of the salt with nitric acid and then add silver nitrate solution to form a cream precipitate
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iodide
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mix a solution of the salt with nitric acid and then add silver nitrate solution to form a yellow precipitate
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In a test for halogens, why is nitric acid added?
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All nitrate compounds are soluble and so it will remove any ions that could react with the silver nitrate solution, such as carbonates
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sulphate
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add dilute hydrochloric acid and then barium chloride solution to form a white precipitate
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carbonate |
add dilute hydrochloric acid to form bubbles of carbon dioxide
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hydrogen |
add a lighted splint for the squeaky pop test
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oxygen
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a glowing splint will relight
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carbon dioxide
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when bubbled through limewater, will turn limewater cloudy
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chlorine
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bleaches damp litmus paper
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Which salts are always soluble? |
Potassium, sodium and ammonium Nitrates |
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Which salts are usually soluble? |
Chlorides Sulphates (some exceptions) |
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Which salts are usually insoluble? |
Carbonates Hydroxides |
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Is potassium carbonate soluble? |
Yes |
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Is silver nitrate soluble? |
Yes |
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Is ammonium hydroxide soluble? |
Yes |
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Is iron hydroxide soluble? |
No |
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Is aluminium sulphate soluble? |
Yes |
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Is calcium hydroxide soluble? |
Only slightly |
