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Faraday’s Laws of Electrolysis, 1. First law, , The amount of the substance deposited or, liberated at cathode directly proportional to, the quantity of electricity passed through, electrolyte., , WeIlxt=IxtxZ=QxZ, , = | current in amp, t = time in sec,, = Q = quantity of charge (coulomb), , = Zis aconstant known as, electrochemical equivalent., , When |= 1 amp, t= 1 sec then Q = 1, coulomb, then w = Z., , Thus, electrochemical equivalent I” the, amount of the substance deposited or, liberated by passing 1A current for 1 sec, (i.e.. 1 coulomb, | x t= Q), , 2. Second law, , When the same quantity of electricity is, passed through different electrolytes. the, amounts of the substance deposited or, liberated at the electrodes arc directly, proportional to their equivalent weights,, Thus,, , Mass of A_ eq. wt. of A, Mass of B-_ eq. wt. of B, , o, 4.424, om EF Z2Q &,, , Hence, electrochemical equivalent «, equivalent weight.