Equipment required for purifying copper experiment via electrolysis?The word you are looking for is probably reducing copper, which means to restore tarnished copper by adding electrons to copper ionsCu2+ + 2 e- - Cu You could do this the same way many people restore tasnished silverYou need the following: - Sink or bowl - Aluminum foil - Hot water - Baking soda (NaHCO3) You place the
aluminum foil in the sink or bowl, add hot water (boiling is best), and add the baking soda, which acts as the salt bridgeWhen you place the copper in the bowl, the aluminum becomes oxidized and the tarnished copper is reduced back to solid copperTry it! I have demonstrated this in chemistry classes with silver, but have not tried it with copper yet.Other related question