Tests for Anions, Cations and Gases: CIE IGSCE

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Carbonate CO3^2-
Add dilute acid - evervescene, CO2 produced
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Chlorine Cl- (in solution)
Acidify with dilute nitric acid, then add aq silver nitrate, white ppt
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Iodide I- (in solution)
acidify with dilute Nitric acid, then add aq silver nitrate, yellow ppt
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Nitrate NO3- (in solution)
Add aq Sodium Hydroxide, then Aluminium foil; warm carefully, ammonia produced
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Sulfate SO2^4-
Acidify, then add aq barium nitrate, white ppt
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Aluminium Al3+
aq Sodium Hydroxide: White ppt, soluble in excess - colourless solution
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Aluminium AL3+
aq Ammonia: white ppt, insoluble in excess
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Ammonium NH4^+
aq Sodium Hydroxide: ammonia made on warming
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Calcium Ca^2+
aq Sodium Hydroxide:white ppt, insoluble excess
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Calcium Ca^2+
aq Ammonia: no ppt, or very slight white ppt.
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Copper Cu2^+
aq Sodium Hydroxide: light blue ppt, insoluble
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Copper Cu2^+
aq Ammonia: light blue ppt, soluble - dark blue
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Iron (II) Fe2^+
Aq Sodium Hydroxide: green ppt, insoluble
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Iron (II) Fe2^+
aq Ammonia: green ppt, insoluble
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Iron (III) Fe3^+
aq Sodium Hydroxide: red brown ppt, insoluble
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Iron (III) Fe3^+
aq Ammonia: Red brown ppt, insoluble
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Zinc Zn2^+
aq Sodium Hydroxide: white ppt, soluble - olourless
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Zinc Zn2^+
aq Ammonia: white ppt, soluble - colourless
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Ammonia NH3
turns damp red litmus paper blue
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Carbon Dioxide CO2
Turns Limewater milky
20 of 23
Chlorine Cl2
Bleaches damp litmus paper
21 of 23
Hydrogen H2
'Pops' with a lighted splint
22 of 23
Oxygen O2
Relights glowing splint
23 of 23

Other cards in this set

Card 2

Front

Acidify with dilute nitric acid, then add aq silver nitrate, white ppt

Back

Chlorine Cl- (in solution)

Card 3

Front

acidify with dilute Nitric acid, then add aq silver nitrate, yellow ppt

Back

Preview of the back of card 3

Card 4

Front

Add aq Sodium Hydroxide, then Aluminium foil; warm carefully, ammonia produced

Back

Preview of the back of card 4

Card 5

Front

Acidify, then add aq barium nitrate, white ppt

Back

Preview of the back of card 5
View more cards

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