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Pile daniell

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toumed

This document discusses oxidation-reduction (redox) reactions involving zinc and copper. Zinc metal oxidizes to form zinc ions in solution, while copper ions in solution are reduced to copper metal. Zinc and copper undergo half reactions where zinc loses electrons during oxidation and copper gains electrons during reduction. The document also shows the redox reactions of zinc and copper ions with sulfate in solution.

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e- I >0 COM A e- e- I NH4+ NO3- Cu2+(aq) + 2 e- = Cu(s) 2 Cu(s) Zn(s) = Zn2+(aq) + 2 e- Zn(s) 2+ (aq) - + oxydation réduction 2 e- 2 e- Cu(s) Zn(s) Zn(s) Zn2+(aq) Cu(s) Cu 2+ I Zn2+ (aq) + SO42- (aq) Cu2+ (aq) + SO42- (aq)

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Pile daniell

  • 1. e- I >0 COM A e- e- I NH4+ NO3- Cu2+(aq) + 2 e- = Cu(s) 2 Cu(s) Zn(s) = Zn2+(aq) + 2 e- Zn(s) 2+ (aq) - + oxydation réduction 2 e- 2 e- Cu(s) Zn(s) Zn(s) Zn2+(aq) Cu(s) Cu 2+ I Zn2+ (aq) + SO42- (aq) Cu2+ (aq) + SO42- (aq)