ElectrochemistryHard
Question
The standard reduction potential for the process:
[Co(H2O)6]3+ + e− → [Co(H2O)6]2+ is 1.8 V.
The standard reduction potential for the process:
[Co(NH3)6]3+ + e− → [Co(NH3)6]2+ is 0.1 V.
Which of the complex ion, [Co(H2O)6]2+ or [Co(NH3)6]2+ can be oxidized to the corresponding cobalt (III) complex, by oxygen, in basic medium, under standard condition?
[Given: $E_{O_{2}|OH^{-}}^{o} = 0.4\text{ V}$]
Options
A.[Co(H2O)6]2+
B.[Co(NH3)6]2+
C.both
D.none of these
Solution
For the complex ion to get oxidised, its reduction potential should be low.
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