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One molal solution of AgNO3 containing 1 kg of water is electrolysed in two electrolytic cells containing Ag and Pt electrodes.2 A current is passed for 2 h in each of them.After electrolysis AgNO3 is
  • a)
    a
  • b)
    b
  • c)
    c
  • d)
    d
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
One molal solution of AgNO3containing 1 kg of water is electrolysed in...
 With Ag electrodes

Ag electrode dissolves at anode and equivalent amount is deposited at the cathode. Thus, there is no change in concentration of AgNO3.
With Pt electrodes

Ag is deposited at the cathode and thus , concentration of AgNO3 decreases.


= 16.12 g = 0.15 mol
AgNO3 left = 1.0 - 0.15 = 0.85 mol in 1 kg water
Molality = 0.85 mol kg-1
= 0.85 molal
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One molal solution of AgNO3containing 1 kg of water is electrolysed in two electrolytic cells containing Ag and Pt electrodes.2 A current is passed for 2 h in each of them.After electrolysis AgNO3isa)ab)bc)cd)dCorrect answer is option 'A'. Can you explain this answer?
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