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Difficult Transition Metal Complex Ions

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mhairireed's version from 2015-05-05 09:03

Section

Question Answer
Cu2+ with excess NH3[ Cu(NH3)4 (H2O)2 ] Dark Blue Solution
Co2+ with excess NH3[ Co(NH3)6 ] Pale Brown Solution
Fe3+ hexaaqua ion [ Fe (H2O)6 ]3+ Pale Violet. [ Fe (OH) (H2O)5 ]2+ Brown. Mixed=Yellow
Cr3+ with excess NaOH[ Cr(OH)6 ]3- Green solution
Cr3+ with excess NH3[ Cr(NH3)6 ]3+ lilac solution
Al3+ with excess NaOH[ Al(OH)4 (H2O)2 ]1- Colourless solution.
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