Ring
Hair Clip
Earring
Necklace
All are shinny and lovely thing that can be take as present for girls.
They looks like 100% silver made. In fact, they are only a piece of useless metal that coated with silver to enable them to looks like pure silver made accessories.
So, the question is, how the silver metal coated onto the useless metal to make it shinny?
The answer is, ta daaaa~~!!!! (refer to below)
Electroplating
What is electroplating? Electroplating is the deposition of a metallic coating from the element to an object. It is done by putting a negative charge on the object and exposing it to a solution containing a metal salt. The positively charged metal ions in the salt solution are attracted to the object and reduced to metallic form upon it.
Sometimes,electroplating is also known as electrodeposition. The item that are to be coated is placed in a container filled with the metal salt solution. For example, the iron spoon above, is connected to the cathode of the circuit while the anode connected with the metal salt that are to be coated on the iron spoon.
When the circuit is connect in the circuit, redox reaction occurs:
Oxidation occurs at the anode
Ag(s) ->Ag(aq)+e-
Reduction occurs at the cathode
Ag(aq)+e- -> Ag(s)
The reduction of silver results in the silver reduced and coated on the spoon.This makes the spoon looks like pure silver made thing.
So, to save money on the gift for girls, buy those accessories with silver coating instead of the pure silver made accessories which will be more expensive. (p/s: no offence)
A neutron walks into a bar, sits down and asks for a drink. Finishing, the neutron asks "How much?"
The bartender says, "For you, no charge."
[Explanation for non-chemists: a neutron is a particle that has no charge. Proton are those with positive charge, and electrons those with negative charge.]
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