how many faradays are required to liberate 8g of hydrogen

Dear student

Mass of Hydrogen =8g
Molar mass =2g/mol
No.of moles = 8g/2g/mol
                    =4



1 molecule of H2 gas is formed by involvement of two electrons.
2H+ +2e --> H2
so total number of electrons involved in 4 moles of gas= 2 x 4 x 6.023 x 1023 electrons = 8 mole of electrons
charge produced for 1 mol =96500C
96500C =1F
so for 8 moles electricity required = 8 x 96500 C =8Faraday
​Regards

  • 9
What are you looking for?