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Q.

Calculate the current (in mA) required to deposite 0.195g of platinum metal in 5.0 hours from a solution of [PtCl6]2 

(Atomic mass Pt = 195)

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a

310

b

31

c

21.44

d

5.36

answer is C.

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Detailed Solution

WE=I×t96500;0.195195×4=5×60×60×I96500

I=21.44mA

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