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Chemistry - Chemical analysis > Testing for other + ions which don't have flame colour > Flashcards

Testing for other + ions which don't have flame colour Flashcards

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1
Q

Which + ions can we use another test for

A

Copper
Calcium
aluminium
magnesium
iron 2
iron 3

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2
Q

how do we test for these ions

A

we add hydroxide solution to the metal ions until a change occurs

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3
Q

What are the results

A

the transition metal ions produced colourful precipitates
Cu2+ - Blue precipitate
Fe2+ - Green precipitate
Fe3+ - brown precipitate

the others produced:
Al3+ - white precipitate
Mg2+ - white precipitate
Ca2+ - white precipitate

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4
Q

what is a precipitate

A

solution —> solid form

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5
Q

what happened if you added excess hydroxide to aluminium

A

white precipitate dissolves

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6
Q

what happens when a hydroxide is added to the metal ions

A

they react to form a solid metal hydroxide

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Chemistry - Chemical analysis (6 decks)

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