How many Faradays of electricity are required to liberate 2 moles of hydrogen gas in electrolysis of aq. solution?
Answer:
4H+ + 4e– → 2H2(g). 4 Faraday of electricity is required to liberate 2 moles of hydrogen gas.
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Given the two half cell reaction: Anode: Cu(s) → Cu2+ (aq) + 2e– Cathode: Ag+ (aq) + e– → Ag(s) Write the galvanic cell for the net reaction.
What happens to free energy during operation of a cell?
The electrode potentials of four elements A, B, C and D are 1.36 V - 0.32 V, 0.0 V and – 1.26 V respectively. Arrange these elements in the decreasing order of reactivity.
What is it that ‘Al’ metal cannot be obtained by electrolysis of an aqueous solution of a salt of aluminium?
