Chemical Forums

Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: khwcm on June 03, 2011, 03:00:54 AM

Title: unknown product
Post by: khwcm on June 03, 2011, 03:00:54 AM

so i was just looking at this
http://woelen.homescience.net/science/chem/exps/fluorescent_copper/index.html
but i dont have pyridine, so i decided to use ammonia instead of it.

I got a blue precipitate at first, and i remove the excess liquid, it turn deep green, with abit brown later..

so can anyone tell me whats going on and what is it?
PS: i didnt got a ultraviolet light ...so i didnt know whether it is a fluorescent complex (or even it is not a complex)

Title: Re: unknown product
Post by: SirRoderick on June 03, 2011, 07:13:58 PM

Pyridine is nothing like ammonia, why did you do that?

*nevermind this part, wasn't accurate*

Turns out I can't remember. A lot of copper solutions are blue and green  ;D

Title: Re: unknown product
Post by: khwcm on June 04, 2011, 06:58:29 AM

i am just so free to find various chemical try and see what are the out come. i tried oxalate ion and phenol but no observible change, while ammonia give a green precipitate(not solution indeed)..
thanks for your reply  ;)

Title: Re: unknown product
Post by: SirRoderick on June 04, 2011, 03:34:25 PM

Try this link.

http://www.chemguide.co.uk/inorganic/transition/copper.html (http://www.chemguide.co.uk/inorganic/transition/copper.html)

Title: Re: unknown product
Post by: khwcm on June 05, 2011, 11:37:05 AM

so do u mean thats [Cu(NH3)2]+ ?