ElectrochemistryHard
Question
Through a solution of CuSO4 a current of 3 amperes was passed for 2 hours. At cathode 3 g of Cu2+ ions were discharged. The current efficiency is [At. wt. of Cu = 63.5]
Options
A.33.3%
B.42.2%
C.48.7%
D.54.4%
Solution
According to law of electrolysis, Mass deposited (m) - Z i t
or i =
Here, m = 3g, t = 2 t = 2 × 60 × 60 = 7200sec
Z =
; Eq. wt = 
∴ i =
= 1.266A
Efficiency of current
=
× 100
=
× 100 = 42.22%
or i =
Here, m = 3g, t = 2 t = 2 × 60 × 60 = 7200sec
Z =
; Eq. wt = ∴ i =
= 1.266A Efficiency of current
=
× 100=
× 100 = 42.22%Create a free account to view solution
View Solution FreeMore Electrochemistry Questions
Pure water is saturated with pure solid AgCl, a silver electrode is placed in the solution and the potential is measured...AgNO3(aq.) was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot of...Which of the following reactions occurs at the anode during the recharging of lead storage battery ?...Two electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride, are connected i...In a cell that utilises the reaction Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g) addition of H2SO4 to cathode compartment, ...