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Two electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride, are connected in series. The ratio of iron deposited at cathodes in the two cells will be
  • a)
    3 : 1
  • b)
    2 : 1
  • c)
    1 : 1
  • d)
    3 : 2
Correct answer is option 'D'. Can you explain this answer?
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Understanding Electrolytic Cells
In the given scenario, we have two electrolytic cells connected in series: one with acidified ferrous chloride (FeCl2) and another with acidified ferric chloride (FeCl3). Each cell allows for the deposition of iron at the cathode through electrolysis.
Electrochemical Reactions
- In the ferrous chloride cell:
- The reduction reaction at the cathode involves Fe^2+ ions:
- Fe^2+ + 2e^- → Fe (s)
- This reaction shows that 2 moles of electrons deposit 1 mole of Fe.
- In the ferric chloride cell:
- The reduction reaction at the cathode involves Fe^3+ ions:
- Fe^3+ + 3e^- → Fe (s)
- Here, 3 moles of electrons deposit 1 mole of Fe.
Current and Charge Flow
- When the cells are connected in series, the same current flows through both cells, which means the total charge (Q) is constant and can be expressed as:
- Q = I × t (where I is current and t is time)
Calculating Iron Deposited
- For the ferrous chloride cell:
- Let the total charge passed through it be Q. The amount of Fe deposited (n1) can be calculated as:
- n1 = Q / 2 (since 2 moles of e- are required for 1 mole of Fe)
- For the ferric chloride cell:
- The amount of Fe deposited (n2):
- n2 = Q / 3 (since 3 moles of e- are required for 1 mole of Fe)
Ratio of Iron Deposited
- Now, to find the ratio of iron deposited:
- n1 : n2 = (Q/2) : (Q/3) = 3 : 2
Thus, the ratio of iron deposited at the cathodes in the two cells is 3 : 2, which corresponds to option 'D'.
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Two electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride, are connected in series. The ratio of iron deposited at cathodes in the two cells will bea)3 : 1b)2 : 1c)1 : 1d)3 : 2Correct answer is option 'D'. Can you explain this answer?
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Two electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride, are connected in series. The ratio of iron deposited at cathodes in the two cells will bea)3 : 1b)2 : 1c)1 : 1d)3 : 2Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Two electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride, are connected in series. The ratio of iron deposited at cathodes in the two cells will bea)3 : 1b)2 : 1c)1 : 1d)3 : 2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride, are connected in series. The ratio of iron deposited at cathodes in the two cells will bea)3 : 1b)2 : 1c)1 : 1d)3 : 2Correct answer is option 'D'. Can you explain this answer?.
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