peroxide& hcl

[lmills148]

Just to test theory I am soaking about a teaspoon of header pins in 3oz of hcl and 1 oz of peroxide(3%), with no heat I know this will take a while. my question is will this dissolve any gold after all other metals are gone? If it does can it be percipitated with smb.

Does it make a difference if the peroxide is added in smaller amounts more frequently.

I have a few other jars of the same solution with different types of pins, and contacts as not to mix materials


first post
thanx for this board.

 

[lazersteve]

lmills,

Welcome to the forum,

Excellent strategy!!! I like the way you think.

The ratio you specified of 3:1 is not what I recommend, but it's not a bad idea. The lower concentration of peroxide will have a much harder time dissolving any gold so that shouldn't be a problem until you pass the 2:1 ratio with peroxide additions (Acideroxide). If you keep the temperature at room temperature (25 C )you shouldn't have any gold absorbed.

Any absorbed gold will readily percipitate using SMB. It's a little harder to see the percipitation with the dark green color of the solution, it will appear as a slight darkening of the solution within minutes of adding the SMB. After about 30 minutes or so you'll start to notice the bottom of the beaker getting a dark tint to it, that's the gold dropping to the bottom. I wait overnight before pouring off and rinseing.

Keep us posted.

Steve

P.S. You should check out the new Internet Scavenger Hunt contest I just posted!! It's in the General Chat section!!