conduct a experiment for coating on iron key with copper by electroplating method and prepare a note
Answers
Prepare the key for copper-plating by cleaning it with toothpaste or soap and water. Dry it off on a paper towel.
Stir copper sulfate into some hot water in a beaker until no more will dissolve. Your solution should be dark blue. Let it cool.
Use one alligator clip to attach the copper electrode to the positive terminal of the battery (this is now the anode)and the other to attach the key to the negative terminal (now called the cathode).
Partially suspend the key in the solution by wrapping the wire lead loosely around a pencil and placing the pencil across the mouth of the beaker. The alligator clip should not touch the solution.
Place the copper strip into the solution, making sure it doesn't touch the key and the solution level is below the alligator clip. An electrical circuit has now formed and current is flowing.
Leave the circuit running for 20-30 minutes, or until you are happy with the amount of copper on the key.
experimental set-up forelectroplating copper on aniron spoon is shown in Fig. In the electrical set up, the iron spoon is made cathode (-ve electrode) and a thin sheet of pure copper is made anode (+ve electrode).