Redox Reactions And Electrochemistry Ques 280

Question: To deposit 0.6354 gm of copper by electrolysis of aqueous cupric sulphate solution, the amount of electricity required (in coulombs) is [MP PMT 1989]

Options:

A) 9650

B) 4825

C) 3860

D) 1930

Show Answer

Answer:

Correct Answer: D

Solution:

$ C{u^{++}}+2{e^{-}}\to Cu $ $ E_{Cu}=\frac{63.54}{2}=31.77 $ Amount of electricity required to deposit .6354 gm of Cu $ =\frac{96500\times 0.6354}{31.77}=1930,Coulombs $ .



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