what is electrolysis? Explain Faraday's law of electrolysis
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Answer:
The laws state that (1) the amount of chemical change produced by current at an electrode-electrolyte boundary is proportional to the quantity of electricity used and (2) the amounts of chemical changes produced by the same quantity of electricity in different substances are proportional to their equivalent weights.
Electrolysis involves a simultaneous oxidation reaction at anode and a reduction reaction at the cathode. For example, when electric current, is, passed through molten sodium chloride, the sodium ion is attracted by the cathode, from which, it takes an electrode and becomes a sodium atom.
First law of electrolysis:– During electrolysis the deposited mass on the electrode is directly proportional to the quantity of electricity passing through it. Let W gm of mass is deposited at the electrode after passing camp of current in t second. Hence, from 1st law of electrolysis. W ∝Q (where Q is the quantity of electricity) W ∝ ct or, W = zct As we know that Q = ct Where z is profitionality constant which is called electrochemical equivalent. If c = 1 amp, t = 1 sec, then W = 2 If 1 amp of current is passed through a solution in one second then the deposited mass of the substance on the electrode is equal to its electrochemical equivalents.
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