What is Elctroplating ? How can you carry out Electroplating in laboratory?
List Four uses of Electroplating with the reason for it in each case ?
pls answer fast
Answers
Electroplating is the process of coating a thin layer of a metal such as gold, silver, chromium, etc., over another metal.
This is done to protect the metal or to lend it an attractive look.
For electroplating copper in the laboratory, the following steps are to be taken:
Fill three-forth of a beaker with copper sulphate solution.
Hammer a copper wire to flatten it; then connect it to the positive terminal of a battery.
Connect a spoon to the negative terminal of the battery.
Dip the copper wire as well as the spoon in the copper sulphate solution, and let the current pass.
At the end of this experiment, you will observe a layer of copper formed over the spoon.
Uses with reason
1. Tin cans are used for storing food which are made by electroplating tin metal on to iron.
2. It is used in bicycle to resist rust or corrosion.
3. It is used in jewellery to make it lustrous.
4. It is used in LPG stoves to resist rust.
If you need more detailed definition of Electroplating.
Pls see this:-
Electroplating is a general name for processes that create a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current. The part to be coated acts as the cathode (negative electrode) of an electrolytic cell; the electrolyte is a solution of a salt of the metal to be coated; and the anode (positive electrode) is usually either a block of that metal, or of some inert conductive material. The current is provided by an external power supply.