Manipal MET2015ChemistryElectrochemistry
How long (in hours) must a current of 5.0 A be maintained to electroplate 60 g of calcium from molten CaCl ₂ ?
Options
- A27 h
- B8.3 h
- C11h
- D16 h
Correct answer
D. 16 h
Step-by-step solution
w=60 ~g , i=5 ~A Equivalent of Ca = atomic weight Valency = 40 2 =20 According to first law of faraday electrolysis w = Zit = Equivalent weight 96500 i T aligned 60 & = 20 96500 5 T T & = 96500 60 20 5 s T & = 96500 60 20 5 60 60 ~h & =16.08 ~h . 16 ~h . aligned