An electrowinning cell produces $10k\frac{g}{h}$ of nickel at a current efficiency of $80\%.$ The cell contains $20$

cathodes and operates at a current of $215\frac{A}{m^2}$ and a potential of $2V.$ determine:

i$)$ The energy consumption

ii$)$ Flow rate of the electrolyte and

iii$)$ The cathode length for a width of $1m.$ the concentration of nickel cations is $35\frac{g}{l}.$