The approximate time duration in hours to electroplate 30 of calcium from molten calcium chloride using a current of 5 ~A is [At. mass of Ca =40 ]

Step-by-step solution

Ca ²⁺+2 e ⁻ Ca (at cathode) 1 ~mol CaCl ₂=2 ~F From Q=i t n 2 ~F = it t= n 2 F i = 30 40 2 96500 5 =28950 ~s = 28950 60 60 ~h =8.04 ~h