ElectrochemistryMedium
Question
The standard reduction potentials at 298 K for the following half reactions are given against each :
Zn2+(aq) + 2e- ⇋ Zn(s) - 0.762
Cr3+(aq) + 2e- ⇋ Cr(s) - 0.740
2H+(aq) + 2e- ⇋ H2(g) 0.000
Fe3+(aq) + 2e- ⇋ Fe2+(aq) 0.770
Which is the strongest reudcing agent ?
Zn2+(aq) + 2e- ⇋ Zn(s) - 0.762
Cr3+(aq) + 2e- ⇋ Cr(s) - 0.740
2H+(aq) + 2e- ⇋ H2(g) 0.000
Fe3+(aq) + 2e- ⇋ Fe2+(aq) 0.770
Which is the strongest reudcing agent ?
Options
A.Zn(s)
B.Cr(s)
C.H2(s)
D.Fe2+(aq)
Solution
EoR.P. for Zn is most negative, so among the given metals it is strongest reducing agent.
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