November 29, 2021, 03:34:16 AM
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Topic: Why does the benedict's test give different colours?  (Read 171 times)

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Offline Beans

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Why does the benedict's test give different colours?
« on: November 07, 2021, 01:09:22 AM »
I'm aware that the copper is reduced from Cu(ii) to Cu(i) to give the colour change from blue to red. But what accounts for other colours such as green or yellow. How does the concentration affect this?

Offline Corribus

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Re: Why does the benedict's test give different colours?
« Reply #1 on: November 09, 2021, 08:54:29 AM »
Copper I oxide precipitates and the color changes as a function of particle size.

https://pubs.acs.org/doi/10.1021/acs.jchemed.5b00563
What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman

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