When ferric chloride comes in contact with metallic copper, one of its chlorine atoms is transferred to a copper atom, making copper (II) chloride, or cupric chloride, which is soluble in water.

The standard go-to solution is ferric chloride. It isn’t too tricky to ... Of course, if you’re diluting the acid with water anyway, the peroxide concentration may be moot.

Products used: 0:59 WD-40 1:34 Degreaser 1:51 Sodium carbonate 2:07 12V power supply 2:55 Ferric chloride 3:26 Sodium bicarbonate (and water) 3:56 WD-40 4:03 White mineral oil Interesting video ...

Compounds with a phenol group will form a blue, violet, purple, green, or red-brown color upon addition of aqueous ferric chloride. This reaction can ... As a control, add a few drops of 1% FeCl3 to ...