Electrode Potential
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While Fe3+ is stable, Mn3+ is not stabe in acid solution because:
(Mn3++e−→Mn2+, E∘=1.5 V;O2+4H++4e−→2H2O, E∘=+1.23V;Fe3++e−→Fe2+, E∘=0.77V)
The standard electrode potentials of Zn2+Zn and Ag+Ag are −0.763 V and +0.799 V respectively. The standard potential of the cell is
- 1.562V
- 2.361V
- – 1.562 V
- – 2.361V
- 2.361V
- – 1.562 V
- – 2.361V
- 1.562V
The potential difference between electrode and electrolyte is called
If the reduction potential Ni→Ni2++2e− is −0.25V .
If the tendency of the electrode is to get reduced, the potential difference between the electrode and electrolyte
Reduction potential
Oxidation potential
Given below are the half-cell reaction:
Mn2++2e⊖→Mn; E⊖=−1.18V
2(Mn3++e⊖→Mn2+; E⊖=+1.51V
The E⊖ for 3Mn2+→Mn+2Mn3+ will be:
(IIT-JEE 2014)
(a) -0.33 V; the reaction will not occur
(c) -2.69 V; the reaction will not occur
(b) -0.33 V; the reaction will occur
(d) -2.69 V; the reaction will occur
- Sieving
- Filtration
- Decantation
- Centrifugation