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18 Cards in this Set
- Front
- Back
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How can you identify group 1 and group 2 metals?
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Flame Tests
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What colour flame does lithium have?
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Bright red
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What colour flame does sodium have?
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Golden yellow
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What colour flame does potassium have?
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Lilac
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What colour flame does calcium have?
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Brick red
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What colour flame does barium have?
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Green
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What solution can be used to identify different metal ions depending on the precipitate that is formed?
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Sodium hydroxide solution
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What do ammonium ions produce when sodium hydroxide solution is added and warmed?
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Ammonia :)
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How can you identify carbonates?
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By adding a dilute acid, this produces CO2 gas.
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How do you identify halides?
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By adding nitric acid and silver nitrate solution, this produces a precipitate of silver halide
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How do you identify sulfates?
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By adding hydrochloric acid and barium chloride solutin to produce a white precipitate of barium sulfate
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How do you identify nitrates?
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By adding sodium hydroxide solution and a little aluminum powder to produce ammonia gas
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What happens to organic compounds when we heat them?
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The burn or char, inorganic substances do not
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How can you work out the empirical formula of an organic compound?
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From the radio of the products produced when it burns
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How can we detect a carbon-carbon double bond?
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Using bromine water
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What are some key things that modern instrumental techniques depend on?
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Electronics and computers (these provide fast, accurate and sensitive ways of analysing chemical substances)
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What can be used to analyse and identify the chemical elements in a sample?
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Atomic absorption spectroscopy (AAS)and mass spectrometry
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How can you seperate compounds in a mixture?
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By using chromatography
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