In this video I'll be making copper chloride from the reaction of copper metal with hydrochloric acid and hydrogen peroxide. To begin I put an excess of copper into a beaker and then added 100ml of water. To this I added 200ml of 12% hydrogen peroxide. I then added about 100ml of concentrated hydrochloric acid to the beaker. After quite a short time, so very noticeable color change, the solution goes from clear to a lime kind of color. What's happening here is the hydrogen peroxide, it's oxidizing the copper into the copper chyan and it's a side product, the oxide ion is produced as well as water. Hydrochloric acid then reacts with the copper two ions to make copper two chloride and then two hydrogen ions. The two hydrogen ions then react with the oxide ion made in the first reaction to make water. These bubbles that you can see are oxygen bubbles from a decomposition of hydrogen peroxide due to the heat made from this reaction. This reaction was so hot that I was worried it would ruin my plastic table cover so I put it onto a fire brick to protect the cover. After leaving the reaction to run over night, it'd finally cooled down and two distinct layers had formed. Underneath the water it was obvious that some bits of copper had been completely corroded. I filled the solution and was left with an ash green filtrate and then transferred the filtrate into a 1000 millilitre beaker. I bought it off the water until there was around 50 millilitres of solution left and then transferred it into a crystallising dish to let it evaporate over a week. Seven days later after leaving it to dry, this is what remains. The top bit is actually copper one chloride which is decomposed from the top copper two chloride and released chlorine gas. That brown bit is the anhydrous copper chloride and at the bottom there's copper two chloride that hasn't decomposed yet. The anhydrous copper chloride can easily be turned back into the hydrous copper chloride by leaving it outside in a humid environment. This is a better view of copper two chloride. I think that this hasn't decomposed into copper one chloride because it's not been as exposed to sunlight as the top layer has. I thought it would be interesting to see what this looked like under a microscope. So it took a small crystal and put it onto a microscope slide and then took a few photos of it. But this is by far the best one.