ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: NE2000 on September 15, 2009, 07:23:36 pm
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Alright, basically I was doing a chem paper and they said an electrolytic cell formed a red-brown colour around one electrode and it asked what was being formed. So what coloured substances should we be able to identify by colour?
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Red-brown is iron I think.
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From memory, pretty much just that one. The bromine test is something you should've learnt about either in a textbook or a prac. Flame colours (e.g. sodium yellow, chlorine green etc) might also be tested but I don't recall there ever being a question on it.
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CuSO4 is blue, I think we're meant to know that.
The bromine test decolourizes unsaturated hydrocarbons that's all good but I don't think they'll ask that or the flame colours in Unit 4.
By the way the answer was bromine forming...
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CuSO4 is blue, I think we're meant to know that.
The bromine test decolourizes unsaturated hydrocarbons that's all good but I don't think they'll ask that or the flame colours in Unit 4.
By the way the answer was bromine forming...
Oh yes, you're in unit 4 now. And well yeh, I guess copper sulfate is another standard one. Still can't recall any other common ones though. If you've been paying attention in pracs, you should be fine though.