AQA Chemistry - Unit 5 - Metal Aqua Ion Colours

AQA Chemistry metal aqua ion colours and reactions

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  • Created on: 02-05-13 08:50
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2+ complex ions
[Fe(H20)6)]2+ - pale green
with OH- [Fe(H20)4(OH)2] - green gelatinous ppt
with XS OH- [Fe(H20)4(OH)2] - green gelatinous ppt
with NH3- [Fe(H20)4(OH)2] - green gelatinous ppt
with XS NH3- [Fe(H20)4(OH)2] - green gelatinous ppt
with carbonate [FeCO3] ­ green ppt
[Cu(H20)6]2+ - pale blue
with OH- [Cu(H20)4(OH)2] pale blue ppt
with XS OH- [Cu(H20)4(OH)2] pale blue ppt
with NH3- [Cu(H20)4(OH)2] pale blue ppt
with XS NH3- [Cu(NH3)4(H20)6]2+ deep blue sol
with carbonate [CuCO3] ­ blue green precipitate
[Co(H20)6]2+ pink
with OH- [Co(H20)4(OH)2] blue ppt
with XS OH- [Co(H20)4(OH)2] blue ppt
with NH3 [Co(H20)4(OH)2] blue ppt
with XS NH3 [Co(NH3)6]2+ pale yellow/brown sol
with carbonate [CoCO3] pink ppt
3+ complex ions
[Fe(H20)6]3+ purple/yellowy brown
with NaOH [Fe(H20)3(OH)3] brown gelatinous ppt ppt
with XS NaOH [Fe(H20)3(OH)3] brown gelatinous ppt
with Nh3 [Fe(H20)3(OH)3] brown gelatinous ppt
with XS NH3 [Fe(H20)3(OH)3] brown gelatinous ppt
with carbonate [Fe(H20)3(OH)3] brown gelatinous ppt and C02 bubbles
[Al(H20)6]3+ colourless
with NaOH [Al(H20)3(OH)3] white ppt
with XS Naoh [Al(OH)4] colourless sol
with NH3 [Al(H20)3(OH)3] white ppt
with XS NH3 [Al(H20)3(OH)3] white ppt
with carbonate [Al(H20)3(OH)3] white ppt and CO2 bubbles
[Cr(H20)6]3+ ruby
with NaOH [Cr(H20)3(OH)3] green ppt
with XS NaOH [Cr(OH)6]3 green sol
with NH3 [Cr(H20)3(OH)3] green ppt

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XS NH3 [Cr(NH3)6]3+ purple sol
with carbonate [Cr(H20)3(OH)3] green ppt and cO2 bubbles…read more

Comments

Rebecca

Cu2+ with XS NH3- [Cu(NH3)4(H20)6]2+ deep blue sol

Typo I think? Or maybe you've been taught differently? I didn't think it was possible to have 10 ligands? [Cu(NH3)4(H20)2]2+ makes more sense to me. Sorry to be that annoying kid that corrects people! 

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