Cu+ is not stable and undergoes disproportion. E for cu+ disproportionation.

(E° cu2+/cu =0.153V , E° cu+/cu=0.53V).

(a) +0.683 V

(b) -0.367 V

(c) +0.3415 V

(d) +0.367 V

Question

Cu+ is not stable and undergoes disproportion. E for cu+ disproportionation. (E &deg; cu2+/cu =0.153V , E &deg; cu+/cu=0.53V). (a) +0.683 V (b) -0.367 V (c) +0.3415 V (d) +0.367 V

Ramesh V · Answer

I want th make a small correction to question

Its cu²⁺/cu⁺=0.153V i.e., cu²⁺ + e^- ------> cu⁺E⁰= 0.153 V

Now going into problem

Cu+ solutions, tend to give a disproportion reaction:
2Cu⁺ ----- > Cu + Cu²⁺

cu⁺ + e^- ------> cuE⁰= 0.53 V so, nE⁰= 0.53 V

cu⁺ ------> cu²⁺+ e^-E⁰= - 0.153 V so, n E⁰= - 0.153 V

on adding above rxns we get
2Cu⁺ ----- > Cu + Cu^{2+ with} E⁰= +0.377 V

^{Option is D}

ankit singh · Answer

The relationship between standard gibbs energy change for a reaction and its cell potential is Δ G o = − n F E c e l l o ​ . For copper electrodes, Δ G C u 2 + ∣ C u o ​ = Δ G C u 2 + ∣ C u + o ​ + Δ G C u + ∣ C u o ​ − n F E C u 2 + ∣ C u o ​ = − n F E C u 2 + ∣ C u + o ​ − n F E C u + ∣ C u o ​ 2 × E C u 2 + ∣ C u o ​ = 1 × E C u 2 + ∣ C u + o ​ + 1 × E C u + ∣ C u o ​ Substitute values in the above equation. 2 × E C u 2 + ∣ C u o ​ = 1 × E C u 2 + ∣ C u + o ​ + 1 × E C u + ∣ C u o ​ = 0 . 1 5 3 V + 0 . 5 3 V E C u 2 + ∣ C u ​ = 0 . 3 4 1 5 V

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Cu+ is not stable and undergoes disproportion. E for cu+ disproportionation. (E ° cu2+/cu =0.153V , E ° cu+/cu=0.53V). (a) +0.683 V (b) -0.367 V (c) +0.3415 V (d) +0.367 V

Cu+ is not stable and undergoes disproportion. E for cu+ disproportionation.

(E° cu2+/cu =0.153V , E° cu+/cu=0.53V).

(a) +0.683 V

(b) -0.367 V

(c) +0.3415 V

(d) +0.367 V

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Cu+ is not stable and undergoes disproportion. E for cu+ disproportionation. (E ° cu2+/cu =0.153V , E ° cu+/cu=0.53V). (a) +0.683 V (b) -0.367 V (c) +0.3415 V (d) +0.367 V

Cu+ is not stable and undergoes disproportion. E for cu+ disproportionation. (E° cu2+/cu =0.153V , E° cu+/cu=0.53V). (a) +0.683 V (b) -0.367 V (c) +0.3415 V (d) +0.367 V

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Cu+ is not stable and undergoes disproportion. E for cu+ disproportionation.

(E° cu2+/cu =0.153V , E° cu+/cu=0.53V).

(a) +0.683 V

(b) -0.367 V

(c) +0.3415 V

(d) +0.367 V