Coloured Compounds (AQA A2 Chemistry)

Filip Lastovka
Flashcards by Filip Lastovka, updated more than 1 year ago
Filip Lastovka
Created by Filip Lastovka almost 5 years ago
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Description

Colours of complex compounds, unit 15 and 16.

Resource summary

Question Answer
[V(H2O)6]2+ hexaaquavanadium(II) ion violet
[V(H2O)6]3+ hexaaquavanadium(III) ion green
[VO(H2O)5]2+ pentaaquaoxovanadium(IV) ion blue
[VO2]+ dioxovanadium(V) ion yellow (orange-yellow)
[Fe(H2O)6]2+ hexaaquairon(II) ion pale green
[Fe(H2O)6]3+ hexaaquairon(III) ion pale violet
[Cr(H2O)6]2+ hexaaquachromium(II) ion blue
[Cr(H2O)6]3+ hexaaquachromium(III) ion red-violet (ruby)
[Co(NH3)6]2+ hexaamminecobalt(II) ion straw coloured turns brown in air (oxidised to hexaamminocobalt(III) ions)
[Co(NH3)6]3+ hexaamminecobalt(III) ion brown
[MnO4]- manganate(VII) ion deep purple
[Mn(H2O)6]2+ hexaaquamanganese(II) ion very pale pink
[CrO4]2- chromate(VI) ion yellow
[Cr2O7]2- dichromate(VI) ion orange
Fe(H2O)4(OH)2 tetraaquadihydroxyiron(II) green gelatinous ppt turns brown gelatinous in air (oxidised to Fe(H2O)3(OH)3)
Fe(H2O)3(OH)3 triaquatrihydroxyiron(III) brown gelatinous ppt
FeCO3 iron(II) carbonate green ppt
[Co(H2O)6]2+ hexaaquacobalt(II) ion pink
Co(H2O)4(OH)2 tetraaquadihydroxycobalt(II) blue-green ppt turns pink then brown in air
CoCO3 cobalt(II) carbonate pink ppt
[Cu(H2O)6]2+ hexaaquacopper(II) ion pale blue
[Cu(NH3)4(H2O)2]2+ tetraamminediaquacopper(II) ion deep blue
Cu(H2O)4(OH)2 tetraaquadihydroxycopper(II) pale blue ppt
CuCO3 copper carbonate blue-green ppt
Cr(H2O)3(OH)3 triaquatrihydroxychromium(III) green ppt
[Cr(OH)6]3- hexahydroxychromium(III) ion green
[Cr(NH3)6]3+ hexaamminechromium(III) ion purple
[Al(H2O)6]3+ hexaaquaaluminium(III) ion colourless
Al(H2O)3(OH)3 triaquatrihydroxyaluminium(III) white ppt
[Al(OH)4]- tetrahydroxyaluminium(III) ion colourless
[CuCl4]2- tetrachlorocopper(II) ion yellow-green
[CoCl4]-2 tetrachlorocobalt(II) ion blue
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