If 48,000 coulombs of electricity are required to discharge 0.5 mole of sodium from a molten sodium chloride mass, then the number of coulombs required to discharge 2 moles of lead from molten lead (ll) chloride is?
A. 48,000 B. 96,000 C. 192,000 D. 384,000 E. 576,000
Correct Answer: D
Explanation
48,000 coulombs are required to discharge 0.5 mole of Na ∴ 1 m will be discharged by 2 x 48,000 = 96,000 coulombs 2 moles of Na will be discharged by 2 x 96,000 = 192,000 For lead (Pb) two electrons are involved. ∴ Number or coulombs required to discharged 2 moles of Pb = 2 x 192,000 = 384,000 coulombs
