A solution containing one mol per litre each of Cu(NO3)2, AgNO3, Hg2(NO3)2 and MgSO4 is being electrolysed by using inert electrodes.The standard electrode potentials (reduction potentials) are: Ag⁺/Ag = +0.80 V Hg₂²⁺/Hg = +0.79 V Cu²⁺/Cu = +0.34 V Mg²⁺/Mg = −2.37 V With increasing voltage, the sequence of deposition of metals on the cathode will be-
Metal ions with higher reduction potential discharge first. Order: Ag⁺ > Hg₂²⁺ > Cu²⁺ > Mg²⁺ Hence deposition sequence: Ag → Hg → Cu
1 Faraday of electricity will liberate 1 mole of the metal from the molten of-
NextA current of 2 ampere was passed through solutions of CuSO₄ and AgNO₃ in series.
If 9 g H₂O is electrolysed completely with current efficiency of 50%, then-
EasyThe passage of electricity through certain electrolyte results in liberation of H₂ gas at the cathod
MediumWhen copper sulphate solution is electrolysed in a copper voltameter for 30 s, m gram of copper was
HardA current of 2 A when passed for 5 h through a molten salt deposits 22.2 g of metal of atomic mass 1
EasyIn electroplating, m g of silver is deposited when 4 A current flows for 2 min. The amount of silver
HardSalts of A (atomic mass 15), B (atomic mass 27) and C (atomic mass 48) were electrolysed using same
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