Doubt from Electrochemistry

electrochemistry
faraday-laws
solved
moderate
pp
#1

A well stirred (1 L) solution of 0.1 M CuSO4(Copper Sulphate) is electrolysed at 25°C using copper electrodes with a current of 25 mA for 6 hours. If current efficiency is 50%. At the end of the duration, what would be the concentration of copper ions in the solution?

(1) 0.0856 M (2) 0.092 M (3) 0.0986 M (4) 0.1 M

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#2