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For the following cell, Z n ( s ) | Z n S O 4 ( a q ) | | C u S O 4 ( a q ) | C u ( s ) when the concentration of Z n 2 + is 10 times the concentration of C u 2 + , the expression for Δ G (in J mol − 1 ) is [F is Faraday constant; R is gas constant; T is temperature; E°(cell) = 1.1 V]

Options

  1. A2.303 RT + 1.1 F
  2. B1.1 F
  3. C2.303 RT - 2.2 F
  4. D- 2.2 F

Correct answer

C. 2.303 RT - 2.2 F

Step-by-step solution

ΔG   =   ΔG°   +   2 .303   RT   log 10 Q;   Q   =   Zn 2+ Cu 2 − =   − 2F 1 .1   +   2 .303   RT   log 10 10 =   2 .303   RT − 2 .2   F

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