Transition metal colours Flashcards by Isobel Ge | Brainscape

Q

chromium aqua ion + colour

A

Cr[(H₂O)₆]³⁺ + violet solution (–> green if heated)

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Q

fe(II) aqua ion + colour

A

Fe[(H₂O)₆]²⁺ + pale green solution

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Q

fe(III) aqua ion + colour

A

Fe[(H₂O)₆]³⁺ + yellow solution

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Q

manganate aqua ion + colour

A

Mn[(H₂O)₆]²⁺ + pale pink solution

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Q

copper aqua ion + colour

A

Cu[(H₂O)₆]²⁺ + pale blue solution

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Q

chromium w nh3 dropwise + colour

A

Cr[(OH)₃] + dark green ppt

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Q

chromium w excess nh3 + colour

A

[Cr(NH₃)₆]³⁺ + purple solution

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Q

chromium w excess oh

A

[Cr(OH)₆]^3- + dark green solution

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Q

fe(II) w naoh dropwise

A

Fe[(OH)₂] + dark green ppt

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Q

fe(III) w naoh dropwise

A

Fe[(OH)₃] + orange-brown ppt

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Q

mn w naoh dropwise

A

Mn[(OH)₂] + pale brown ppt

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Q

copper w nh3 dropwise

A

Cu[(OH)₂] + pale blue ppt

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Q

cr w excess nh3

A

Cr[(NH₃)₆]³⁺ + purp solution

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Q

copper w excess nh3

A

[Cu(NH₃)₄(H₂O)₂]²⁺ + dark blu solution

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Q

copper w excess hcl

A

[CuCl₄^2- + yellow

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Q

reduction of copper w I-

A

Cu⁺ + white ppt (CuI) and brown I₂

Q

disproportionation of Cu

A

Cu²⁺ (brown solid) + CuSO₄ (blue solution)

Q

cobalt + water + excess hcl

A

CoCl₄^2-