Standard Reduction Potential

  • Ag+ + e- → Ag
    Cu2+ + 2e- → Cu
  • Cu2+ + 2e- → Cu + 0.34
    Ag+ + e- → Ag + 0.80
  • Eo Cu2+/Cu Means standard Reduction potential of copper at P = 1 atm, T = 298 K (250 C) and [M] = 1 molar.

Eo  Cu/Cu2+ → SOP (Standard Oxidation Potential)
Eo  Ag+/Ag → Standard Reduction Potential (Standard RP)

E  Ag+/Ag → Reduction Potential (RP)

Ag+ + e- → Ag  [Reduction Potential ]

Eo  Zn/Zn2+ = 0.76 V        Zn → Zn2+ + 2e-   (SOP)

Eo  Zn2+/Zn = -0.76 V       Zn2+ + 2e- → Zn  (SRP)

Ex.

A → A+ + e- 1.2 V A+ + e- → A

B → B+ + e- 1.0 V B+ + e- → B

C → C+ + e- 0.8 V C+ + e- → C

D → D+ + e- -0.4 V D+ + e- → D

E → E+ + e- -0.8 V E+ + e- → E

  • What’s the Oxidation Potential of A ? 1.2 V
  • What’s the Reduction Potential of C ? – 0.8 V
  • What’s E D/D+ ? – 0.4
  • What’s E B+/B ? – 1.0
  • Which is more metallic A or D ?  A
  • Which is more non – metallic B or C ? C
  • Which can displace Hydrogen gas from H2SO4 ? A, B, C
  • Which undergoes easy reduction A or B ? B
  • Which is better oxidation agent B or C ? C
  • Which is better reducing agent B or E ? B
  • Which can displace D from it’s salt C or E ?  C
  • What you can say about D+ + e- → D, reduction potential or oxidation potential ? Reduction potential
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