colours for transition metals Flashcards by evie baxter

Q

Cu²⁺

A

pale blue solution

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Q

Cu(OH)₂

A

pale blue precipitate

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Q

[Cu (NH₃)₄ (H₂O)₂]²⁺

A

dark blue solution

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Q

CuCl₄²⁻

A

yellow solution

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Q

reduction of Cu²⁺ with I⁻

A

CuI- white precipitate
I₂- brown

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Q

disproportionation of Cu⁺

A

Cu- brown solid
CuSO₄- pale blue solution

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Q

CoCl₄²⁻

A

blue solution

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Q

Cr³⁺

A

pale purple solution
heat–>green solution

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Q

Cr(OH)₃

A

dark green precipitate

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Q

[Cr (NH₃)₆ ]³⁺

A

purple solution

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Q

[Cr (OH)₆ ]³⁻

A

dark green solution

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Q

CrO₄²⁻

A

yellow solution

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Q

Mn²⁺

A

pale pink solution

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Q

Mn(OH)₂

A

brown precipitate

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Q

Fe²⁺

A

pale green solution

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Q

Fe(OH)₂

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A

dark green precipitate

Q

Fe³⁺

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A

yellow solution

Q

Fe(OH)₃

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A

orange precipitate

Q

MnO₄⁻/Fe²⁺

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A

MnO₄⁻- purple
makes Mn²⁺- (pale pink) colourless

Q

I⁻/Fe³⁺

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A

orange/brown (Fe³⁺)
brown (I₂)