Thermal-Chemical Effects of Currents


   
 
Numerical 06
06. A piece of metal weighting 200 g is to be electroplated with 5% of its weight in gold. If the strength of the available current is 2 ampere, how long would it take to deposit the required amount of gold? Given: Electrochemical equivalent of hydrogen = 0.1044 x 10-4 g C-1
 
At. wt. of gold = 197.1 and At. wt. of hydrogen = 1.0008.
 
Suggested solution:
 
 
 
 
Mass to be deposited, m=5% of 200g = 10g
 
We know that m = ZIt.
 
 
t = 2.03h
 
  
     
   
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