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Ifa current of 500A is used, how many hours will be required to convert all the 1000kg of MgCl2 into Mg metal

Ifa current of 500A is used, how many hours will be required to convert all the 1000kg of MgCl2 into Mg metal

Grade:12

1 Answers

Chhavi Jain
92 Points
6 years ago
Dear student , 
 
we can say that ,  moles of MgCl2  = (1000 * 1000 ) / 94 =   moles of Mg2+ = 10638.2 moles
 
  Now,            Mg2+     +     2e-   ------->   Mg
 
To convert 1 mole Mg ions ------> 2 F charge is required ( or 2 mole electrons )
So, to convert  10638.2 moles of Mg ions ---->  2 F * 10638.2  charge is required
                                                                         = 2 * 96500 * 10638.2 C
                                                                         
Now, use the formula  Q= It  to find the time :
 
Q : charge
I : current 
t : time
 
2 * 96500 * 10638.2 = 500 * t 
 
                              t = 4106345.2  sec  or 1140 hrs ( approx)
 
Chemistry Consultant
askiitians
 

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