NEETChemistryd and f Block Elements
What is the reason that Cobalt(II) is stable in aqueous solution but in the presence of complexing reagents it is easily oxidized?
Options
- AAlthough the 3rd ionization energy for Co is high, the higher amount of crystal field stabilization energy [CF
- BComplexing reagents decrease the stability of cobalt(II) ions.
- CCobalt(II) has a high ionization energy.
- DComplexing reagents have a lower atomic number than cobalt(II).
Correct answer
A. Although the 3rd ionization energy for Co is high, the higher amount of crystal field stabilization energy [CF
Step-by-step solution
Correct Option is : (A) Although the 3rd ionization energy for Co is high, the higher amount of crystal field stabilization energy [CFSE] released in the presence of strong-field ligands overcomes this ionization energy.