Explain the role of electrodes in electrolysis?
Answers
We put two electrode in the liquid and applying voltage across them in the process of electrolysis .In a circuit ,an electrode is a conductor that is in contact with a non metallic things like a liquid or gas. The electrode connected to the positive terminal of a battery is called the anode and the electrode connected to the negative terminal is called cathode. All substance are made up of atoms which have charged particle called electrons and protons and we know that electricity in all forms is due to charges of these particles. When electrolysis is done and electricity passes through an electrolyte, the positive ions of the electrolyte move towards the cathode (negative electrode) where they gain electrons to become neutral substance . Negative Ion move towards the anode (positive electrode) and give up the electrons to become neutral . If the neutral substance is a gas in its nutural state , it is evolved at an electrode . If it is a metal , it is deposited at the cathode with the formation of a neutral substances ,the electrolyte is deposited .So we say that the decomposition of an electrolyte when electricity is passed through it is called electrolysis.
In the application of electrolysis,, like silver plating, gold plating we have to use some specific cathode and anode also ...
Explanation:
In #Gold plating,,
Cathode:. Less worthy Metals
Anode:. Pure Gold