Testing for Cations/Anions

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  • Created by: Harry
  • Created on: 12-05-14 16:59
Why can't metal hydroxides have flame tests?
They are insoluable
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What do you add to metals that can't have flame tests?
NaOH solution
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What colour is the precipitate of Copper (II) once tested with NaOH?
Blue
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What colour is the precipitate of Iron (II) once tested with NaOH?
Sludgy/dark green
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What colour is the precipitate of Iron (III) once tested with NaOH?
Reddish brown
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How would you test for Ammonia?
Add it to NaOH solution and check w/ damp, red litmus paper. If it changes from red to blue --> Ammonium ions present
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How would you detect carbonates?
Use HCl --> Gives off CO2 when in contact with a carbonate
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How would you test for sulfates?
Add dilute HCl and BaCl2 (barium chloride) solution --> Produces white precipitate
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How would you test for Chlorine, Bromine and Iodine ions (Cl-, Br- and I-)?
Add dilute nitric acid (HNO3): Chlorine --> White, Bromide --> Cream, Iodine --> Yellow
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Other cards in this set

Card 2

Front

What do you add to metals that can't have flame tests?

Back

NaOH solution

Card 3

Front

What colour is the precipitate of Copper (II) once tested with NaOH?

Back

Preview of the front of card 3

Card 4

Front

What colour is the precipitate of Iron (II) once tested with NaOH?

Back

Preview of the front of card 4

Card 5

Front

What colour is the precipitate of Iron (III) once tested with NaOH?

Back

Preview of the front of card 5
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