A metal surface of 100 cm 2 area has to be coated with nickel layer of thickness 0.001 mm. A current of 2A was passed through a solution of Ni(NO 3 ) 2 for 'x' seconds to coat the desired layer. The value of x is_________. (Nearest integer)
( 
Ni (density of Nickel) is 10 g mL -1 , Molar mass of Nickel is 60 g mol -1 F = 96500 Cmol -1 )
Text Solution
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(16) One equivalent of substance deposited for 96500C(one Faraday).
i x t Columbus of charge can be utilised to get w g of substance.
Millimoles of Ni coated
Mass of Ni = 
600
Volume= 
x10 -3 cm 3
= 100 x 10 -4
x = 0.1608 x 10 3
161
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