| Faraday's First Law Of Electrolysis |
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The mass of the substance librated or deposited on an
electrode during electrolysis is directly proportional to the
quantity of electric charge passed through the electrolyte.
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If m is the mass of a substance librated or deposited at an electrode due to the passage of charge q, then according to Faraday's law of electrolysis, |
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m ∞ q or m = zq
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Where z is a constant of proportionality and is called electrochemical equivalent of the substance. It has the same charge which passes is due to a steady current I flowing for time t, then above equation can be written as:
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m = z x I x t
= z x q
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if q = 1C, then m = z |
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Hence electrochemical equivalent of a substance is the mass of the substance librated or deposited in electrolysis by the passage of 1 coulomb of charge.
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