Cations (Tests) Flashcards by Javier Sainz Ribera

Aluminium
in sodium hydroxide (aq)
in ammonia (aq)

WHITE ppt
SOLUBLE in excess, giving a CLESS solution

WHITE ppt
INSOLUBLE in excess

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Ammonium
in sodium hydroxide (aq)
in ammonia (aq)

AMMONIA produced on warming

No reaction

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Calcium
in sodium hydroxide (aq)
in ammonia (aq)

WHITE ppt
INSOLUBLE in excess

No/ very slight white ppt

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Chromium
in sodium hydroxide (aq)
in ammonia (aq)

GREEN ppt
SOLUBLE in excess

GREEN ppt
INSOLUBLE in excess

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Copper
in sodium hydroxide (aq)
in ammonia (aq)

light BLUE ppt
INSOLUBLE in excess

light BLUE ppt
SOLUBLE in excees giving a DARK BLUE solution

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Iron (II)
in sodium hydroxide (aq)
in ammonia (aq)

GREEN ppt
INSOLUBLE in excess

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Iron (III)
in sodium hydroxide (aq)
in ammonia (aq)

RED/BROWN ppt
INSOLUBLE in excess

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Zinc
in sodium hydroxide (aq)
in ammonia (aq)

WHITE ppt
SOLUBLE in excess giving a CLESS solution

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