Chemical Forums

Specialty Chemistry Forums => Biochemistry and Chemical Biology Forum => Topic started by: Beans on November 07, 2021, 01:09:22 AM

Title: Why does the benedict's test give different colours?
Post by: Beans 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?

Title: Re: Why does the benedict's test give different colours?
Post by: Corribus 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