. A certain current liberates 0.5 g of hydrogen in 2 hours


How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution?

A: 12.7 g

B: 15. 9 g

C: 31.8 g

D: 63. 5 g

 

Best Answer

Explanation:-

  • By Faraday's second law:- when the charge passed is same then the ratio of masses deposited

at electron through substance will be in the ratio of their equivalent masses. 

mass of hydrogen / mass of copper = equivalent  mass of hydrogen / equivalent massof copper           

  • On rearranging

copper sulphate

Final Answer:-

The correct answer is ( B) 15.9g

 

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