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Question=>
for example if we do electroplating of any metal and in that process what we have too give in Cathode and anode . For example we are doing the electroplating of potassium bromide?
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Answers
Answer:
Explanation:
Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode. The term is also used for electrical oxidation of anions on to a solid substrate, as in the formation of silver chloride on silver wire to make silver/silver-chloride electrodes. Electroplating is primarily used to change the surface properties of an object (such as abrasion and wear resistance, corrosion protection, lubricity, aesthetic qualities), but may also be used to build up thickness on undersized parts or to form objects by electroforming.
The process used in electroplating is called electrodeposition. It is analogous to a concentration cell acting in reverse. The part to be plated is the cathode of the circuit. In one technique, the anode is made of the metal to be plated on the part. Both components are immersed in a solution called an electrolyte containing one or more dissolved metal salts as well as other ions that permit the flow of electricity. A power supply supplies a direct current to the anode, oxidizing the metal atoms that it comprises and allowing them to dissolve in the solution. At the cathode, the dissolved metal ions in the electrolyte solution are reduced at the interface between the solution and the cathode, such that they "plate out" onto the cathode. The rate at which the anode is dissolved is equal to the rate at which the cathode is plated and thus the ions in the electrolyte bath are continuously replenished by the anode.
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Answer: cathode - pure metal
anode - impure metal
Explanation:
the impure metal from anode disolves in the electrolyte and the positove ions ( cations) are attracted towards the negative terminal i.e. cathode
similarly the negative ion ( anion ) is attracted to the positive terminal i.e. anode.
thus the metal is electroplated with the desired coat( metal)
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