[mnakhla]

I mixed potassium dichromate and aluminum sulfate/aluminum chloride due to some hcl contamination that was needed for the previous experiment which was reduction of copper sulfate via aluminum...
the only possibly purple soultion of chromium that i can think up is the amine.....did some complex form here?? what exactly happened???

please help me identify this

[pantone159]

Sounds like your Cr(VI) was reduced to Cr(III), Cr(III) solutions are usually purple or green, depending.
Not sure what the reducing agent was, you said you had some contamination from a previous reduction around?

[mnakhla]

yes some copper contamination...copper cant reduce chromium i dont atleast not under normal non energy added circumstances