with the help of diagram describe briefly how a key can be electroplated with copper
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Electroplating: Copper-Plated Key
Electroplating uses a form of electrolysisin which the electrodes play a bigger role than just conducting the current. Using electricity, you can coat the metal of one electrode with the metal of the other! Jewelry and silverware can be silver- or gold-plated, while zinc is often used to coat iron to protect against rust. Professional electroplating requires specialized chemicals and equipment to make a high-quality coat, but in this project you can try your hand at a simple procedure that will transfer copper to a brass key. (Adult supervision and chemical safety equipment required.)
Watch us use electricity to copper-plate a brass key in this Home Science Tools video. See this project in action!
What You Need:
1.5-volt D battery with battery holder
Two alligator clip leads or insulated wire
Beaker or glass
Copper sulfate
Copper electrode (or coil of copper wire)
Brass key
Safety equipment
What You Do:
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 theanode)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.
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Electroplating: Copper-Plated Key
Electroplating uses a form of electrolysisin which the electrodes play a bigger role than just conducting the current. Using electricity, you can coat the metal of one electrode with the metal of the other! Jewelry and silverware can be silver- or gold-plated, while zinc is often used to coat iron to protect against rust. Professional electroplating requires specialized chemicals and equipment to make a high-quality coat, but in this project you can try your hand at a simple procedure that will transfer copper to a brass key. (Adult supervision and chemical safety equipment required.)
Watch us use electricity to copper-plate a brass key in this Home Science Tools video. See this project in action!
What You Need:
1.5-volt D battery with battery holder
Two alligator clip leads or insulated wire
Beaker or glass
Copper sulfate
Copper electrode (or coil of copper wire)
Brass key
Safety equipment
What You Do:
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 theanode)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.
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Electroplating is the process of depositing the desired metal on the other metal by passing electric current through a solution called an electrolyte. In electroplating, first of all two electrodes are connected with a battery and inserted in an electrolytic liquid. Among the two electrodes, the metal to be electroplated is made the cathode (here Iron), while the metal which has to be deposited on this metal is taken as anode (here copper). The electrolyte used here is copper sulphate solution. When an electric current is passed, the electrolyte solution breaks into Cu2+ ions and SO42- ions. The Cu2+ move towards negative electrode i.e iron key here and is deposited on it forming a thin layer of copper on it. SO42- ions move towards anode releasing electrons there to flow through the circuit.

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