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GCSE Chemistry > Chemical analysis > Flashcards

Chemical analysis Flashcards

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1
Q

Flame tests can be used to identify what?

A

Metal ions

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2
Q

What color flame do lithium (Li) compounds result in?

A

Crimson red

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3
Q

What color flame do sodium (Na) compounds result in?

A

Yellow

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4
Q

What color flame do potassium (K) compounds result in?

A

Purple

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5
Q

What color flame do calcium (Ca) compounds result in?

A

Red

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6
Q

What color flame do Barium (Ba) compounds result in?

A

Green

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7
Q

Precipitate color - sodium hydroxide is reacted with Magnesium 2+

A

White

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8
Q

Precipitate color - sodium hydroxide was reacted with Aluminum 3+

A

White - dissolves in

excess sodium hydroxide solution.

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9
Q

Precipitate color - sodium hydroxide was reacted with Ca2+

A

White

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10
Q

Precipitate color - sodium hydroxide was reacted with Cu2+

A

Blue

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11
Q

Precipitate color - sodium hydroxide was reacted with Fe2+

A

Green

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12
Q

Precipitate color - sodium hydroxide was reacted with Fe3+

A

Brown

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13
Q

What happens when carbonates react with dilute acids?

A

Carbon dioxide formed.
Carbon dioxide produces a white precipitate
with limewater.
This turns limewater cloudy.

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14
Q

What can be used to test for the presence of halide ions?

A

Silver nitrate solution + dilute nitric acid.

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15
Q

What colour precipitate is silver chloride?

A

White

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16
Q

What colour precipitate is silver bromide?

A

Cream

17
Q

What colour precipitate is silver iodide?

A

Yellow

18
Q

How to test for the presence of sulfate ions? (SO4 2-)

A

React the compound with barium chloride solution and dilute hydrochloric acid. A white precipitate will be formed.

GCSE Chemistry (11 decks)

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