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What is the chemical reaction that occurs in a Daniell cell to convert chemical energy into electrical energy?

Options

  1. AZn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
  2. BZn(s) + 2Cu2+(aq) → Zn2+(aq) + 2Cu(s)
  3. CZn2+(aq) + Cu(s) → Zn(s) + Cu2+(aq)
  4. DCu(s) + Zn2+(aq) → 2Cu2+(aq) + Zn(s)

Correct answer

A. Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)

Step-by-step solution

Daniell cell converts the chemical energy liberated during the redox reaction Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) to electrical energy and has an electrical potential equal to 1.1 V when concentration of Zn2+ and Cu2+ ions is unity.

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