1.

0.2864 of Cu was deposited on passage of a current of 0.5 ampere for 30 minutes through a solution of copper sulphate. What is the electrochemical equivalent of copper ? "(1 F = 96500 coulombs)"

Answer»

Solution :Electrochemical equivalent (Z) is defined as the weight of the substance deposited by the passage of 1 coulomb of electricity.
`therefore z = ("wt. of Cu deposited")/("CHARGE in COULOMBS")`
`= ("wt. of Cu")/("current in AMPERE " xx " time in seconds")`
`= (0.2864)/(0.5 xx 30 xx 60)`
= 0.00032g/coulomb.


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