Question

how many grams of cobalt metal will be deposited when solution of cabalt (II) chloride is electrolyzed with a current of 10 amperes for 109 minutes (1Faraday=96,500 C, Atomic mass of Co=59u)
A. 4
B. 20
C. 40
D. 0.66

Answer 1

Correct Answer - B
`w=Zit`
`thereforew=(E_(B)xxIt)/(96500) " "(thereforeE_(B)=(M_(B))/(Z)=(59)/(2))`
`w=(59)/(2)xx(10xx109xx60)/(96500)`
w=19.9