ElectrochemistryHard

Question

If same quantity of electricity is passed through three electrolytic cells containing FeSO4, Fe2(SO4)3 and Fe(NO3)3, then

Options

A.the amount of iron deposited in FeSO4 and Fe2(SO4)3 are equal
B.the amount of iron deposited in FeSO4 is 1.5 times of the amount of iron deposited in Fe(NO3)3.
C.the amount of iron deposited in Fe2(SO4)3 and Fe(NO3)3 are equal
D.the same amount of gas is evolved in all three cases at the anode.

Solution

Fe2+ + 2e- → Fe [in FeSO4] ;        Fe3+ + 3e- → Fe [in Fe2 (SO4)3]
Fe3+ + 3e-  Fe [in Fe (NO3)3]
Amount of Fe deposited in FeSO4 =
Amount  of Fe deposited in Fe2(SO4)3 =

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