testing for ions Flashcards by Liberty Heaslip | Brainscape

Q

what is the flame test for Li+

A

crimson red

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Q

what is the flame test for Na+

A

yellow

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Q

what is the flame test for K+

A

lilac

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Q

what is the flame test for Cu2+

A

green

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Q

what is the flame test for Ca2+

A

orangey red

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Q

If you add sodium hydroxide to Cu2+

what colour is the precipitate formed?

A

blue precipitate

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Q

If you add sodium hydroxide to Ca2+

what colour is the precipitate formed?

A

white ppt

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Q

If you add sodium hydroxide to Mg2+

what colour is the precipitate formed?

A

white ppt

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Q

If you add sodium hydroxide to Al3+

what colour is the precipitate formed?

A

white ppt

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Q

If you add sodium hydroxide to Fe2+

what colour is the precipitate formed?

A

green ppt

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Q

If you add sodium hydroxide to Fe3+

what colour is the precipitate formed?

A

brown ppt

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Q

how do you test for carbonate ions

and what is the positive result

A

add dilute HCl to get rid of any impurities

bubble it through limewater if it goes from colourless to cloudy carbonate ions are present

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Q

what do you test for sulfate ions with

what is the positive result

A

add barium chloride and hydrochloric acid

white ppt forms if sulfate ions are present

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Q

how do you test for halide ions

A

silver nitrate and nitric acid

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Q

how do you test for chloride ions

what is the positive result

A

white ppt

silver nitrate and nitric acid

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Q

how do you test for bromide ions

what is the positive result

A

cream ppt

silver nitrate and nitric acid

Q

how do you test for iodide ions

what is the positive result

A

yellow ppt

silver nitrate and nitric acid