Sodium hydroxide to drop Gold out

[MetalMan76]

If I use sodium hydroxide to drop gold out of an aqua regia (AR) solution of mixed metals, should the precipitate of the gold be yellow?
If not, what color should I look for to know in fact that it is gold that's dropping out of the AR solution?


Edited to be less annoying to read. Hereafter, please use proper punctuation and avoid unnecessary increasing font size.~Lou

 

[joem]

comment removed; now not related to subject

 

[MetalMan76]

I know theres gold in the solution. I just never used sodium hydroxide before...Im doing a AR test with pure gold and sodium hydroxide. lets see what happens :twisted:

 

[joem]

I know theres gold in the solution. I just never used sodium hydroxide before...Im doing a AR test with pure gold and sodium hydroxide. lets see what happens :twisted:

I have only used it to drop silver fron litho fix

 

[lazersteve]

From a pure gold chloride solution the precipitate will be very dark brown to black colored.

Steve

 

[MetalMan76]

Thanks a lot Steve. U da Man!!!

 

[Lou]

My constructive advice metalman: be careful adding base to acid!! Also, there's no real point to use base to precipitate gold unless the solution is very pure.