Cation Test Flashcards by Yumi Thana | Brainscape

Q

Aluminum test- adding aqueous sodium hydroxide

A

White precipitate
soluble in excess
giving a colourless solution

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Q

Aluminum - aqueous ammonia

A

White precipitate

- insoluble in excess

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Q

Ammonium-sodium hydroxide

A

Ammonia produced on warming

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Q

Calcium-aqueous sodium hydroxide

A

white precipitate

- insoluble in excess

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Q

Calcium- aqueous ammonia

A

No precipitate or very slight precipitate

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Q

Chromium(lll) - aqueous sodium hydroxide

A

Green precipitate

- soluble in excess

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Q

Chromium(lll)- aqueous ammonia

A

Grey-green precipitate

- Insoluble in excess

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Q

Copper(ll)- aqueous sodium hydroxide

A

light blue precipitate

- insoluble in excess

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Q

Copper(ll)- aqueous ammonia

A

light blue precipitate
soluble in excess
*giving a dark blue solution

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Q

Iron(ll)- aqueous sodium hydroxide

A

Green precipitate

- insoluble in excess

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Q

Iron(ll)- aqueous ammonia

A

green precipitate

- insoluble in excess

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Q

Iron(lll) - aqueous sodium hydroxide

A

red brown precipitate

- insoluble in excess

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Q

Iron (lll)- aqueous ammonia

A

red brown precipitate

- insoluble in excess

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Q

Zinc- aqueous sodium hydroxide

A

white precipitate
soluble in excess
giving a colourless solution

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Q

Zinc- aqueous ammonia

A

White precipitate
soluble in excess
giving a colourless solution

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Q

Lead (Pb2+) add NaOH

A

White precipiatate

Dissolves giving a colourless solution in excess

Q

Lead (Pb2+) add ammonium hydroxide

A

White precipitate forms insoluble in excess