Y11 FAQ1 Cation Tests

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9 Terms

1
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Lithium ion flame colour

Red

<p>Red</p>
2
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Sodium ion flame colour

Yellow/orange

<p>Yellow/orange</p>
3
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Potassium ion flame colour

Lilac

<p>Lilac</p>
4
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Copper (II) ion flame colour

Blue/green

<p>Blue/green</p>
5
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Calcium ion flame colour

Orange/red (brick red)

<p>Orange/red (brick red)</p>
6
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Test for aqueous copper (II) ions

Add NaOH(aq), blue precipitate observed

<p>Add NaOH(aq), blue precipitate observed</p>
7
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Test for aqueous iron (II) ions

Add NaOH(aq), green precipitate observed

<p>Add NaOH(aq), green precipitate observed</p>
8
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Test for aqueous iron (III) ions

Add NaOH(aq), brown precipitate observed

<p>Add NaOH(aq), brown precipitate observed</p>
9
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Test for aqueous ammonium ions

Warm with NaOH(aq), test gas evolved with damp red litmus paper, which will turn blue

<p>Warm with NaOH(aq), test gas evolved with damp red litmus paper, which will turn blue</p>