AQA Chemistry Unit 5 - Colour change diagram, for transition metal ions.

resortini

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Hi there, the book I have is really pootly laid out and we don't make any notes in class either. I have an AQA chemistry unit 5 exam next week, and was wondering if anyone could direct me to a diagram, or even share their own, for colour changes when OH-, NH3, and so on, are added to aqueous transition metal ions. I have produced a very poor one of my own, it does help, although I think it could be a lot better. Does anyone know of a good one, either on here, or on the web, suitable for the new AQA chemistry unit 5 spec? Thanks very much in advance.

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resortini

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please

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charco

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(Original post by resortini)
please

You are wasting time asking for something that you could easily prepare yourself ( I believe it's called 'being bone-idle')

You are not looking for explanation, or help with concepts, or even solving problems!

Pick up a good text, or spend half an hour on the internet to find out the colours of all of the relevant TM ions.

Then make your own 'diagram' or 'scheme' or whatever.

The time taken is investment in learning, which will be of benefit to you in the long-run. :yep:

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Mechhz0rz

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If you have the AQA text book, the very last page is a pretty good summary. But, if not, I had the same problem. In short form I can give you the actual colour changes and you can make a colour coded diagram or whatever

starting with the 2+ complex ions
[Fe(H20)6)]2+

with OH- [Fe(h20)4(OH)2] - green gelatinous ppt
with XS OH- [Fe(H20)(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

[Cu(H20)6]2+

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

[Co(H20)6]2+ pink

with OH- [Co(H20)4(OH)2] blue
with XS OH- [Co(H20)4(OH)2] blue
with NH3 [Co(H20)4(OH)2] blue
with XS NH3 [Co(NH3)6]2+ pale yellow/brown
with carbonate [CoCo3] pink

I'll maybe do the 3+ complex ions a little later, but good luck with learning all of them, they're killing me -__-

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resortini

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(Original post by charco)
You are wasting time asking for something that you could easily prepare yourself ( I believe it's called 'being bone-idle')

You are not looking for explanation, or help with concepts, or even solving problems!

Pick up a good text, or spend half an hour on the internet to find out the colours of all of the relevant TM ions.

Then make your own 'diagram' or 'scheme' or whatever.

The time taken is investment in learning, which will be of benefit to you in the long-run. :yep:

fine

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harsjan

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(Original post by Mechhz0rz)
If you have the AQA text book, the very last page is a pretty good summary. But, if not, I had the same problem. In short form I can give you the actual colour changes and you can make a colour coded diagram or whatever

starting with the 2+ complex ions
[Fe(H20)6)]2+

with OH- [Fe(h20)4(OH)2] - green gelatinous ppt
with XS OH- [Fe(H20)(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

[Cu(H20)6]2+

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

[Co(H20)6]2+ pink

with OH- [Co(H20)4(OH)2] blue
with XS OH- [Co(H20)4(OH)2] blue
with NH3 [Co(H20)4(OH)2] blue
with XS NH3 [Co(NH3)6]2+ pale yellow/brown
with carbonate [CoCo3] pink

I'll maybe do the 3+ complex ions a little later, but good luck with learning all of them, they're killing me -__-

This is extremely usefull cud u plsss giv one for 3+complex ions???

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Mechhz0rz

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(Original post by harsjan)
This is extremely usefull cud u plsss giv one for 3+complex ions???

yup

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

:woo:

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lollerblades

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(Original post by Mechhz0rz)
yup

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

:woo:

You are a ****ing god... xxxxxxx

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Mr Moonlight

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I know i'm a bit late to the party but here's the ones we need to know for the the new AQA spec

Attached files

Colours.pdf (188.8 KB)

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Super199

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(Original post by Mr Moonlight)
I know i'm a bit late to the party but here's the ones we need to know for the the new AQA spec

Much love x

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123chem

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(Original post by Mr Moonlight)
I know i'm a bit late to the party but here's the ones we need to know for the the new AQA spec

You know aqa have already made one for us? XD
http://filestore.aqa.org.uk/resource...METAL-IONS.PDF

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AQA Chemistry Unit 5 - Colour change diagram, for transition metal ions. Watch

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