Cation and Anion Tests with Flame Colors and Precipitates

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14 Terms

1
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Li+

crimson red

2
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Na+

yellow

3
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K+

lilac

4
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Ca2+

brick red

5
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Cu2+

blue-green

6
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NH4+

warm the mixture and identify the ammonia evolved by its pungent smell and ability to turn damp red litmus blue

7
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Cu2+ (hydroxide test)

blue

8
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Fe2+ (hydroxide test)

green

9
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Fe3+ (hydroxide test)

brown

10
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Cl-

white

11
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Br-

cream

12
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I-

yellow

13
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SO42-

presence of the dense white barium sulphate precipitate formed when reacted with dilute hydrochloric acid and barium chloride solution

14
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CO32-

identify the gas evolved as carbon dioxide by bubbling it through limewater, which should turn cloudy