Chemistry Class 12 NCERT Solutions: Chapter 9 Coordination Compounds Part 14
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Q: 8. Explain is an inner orbital complex whereas complex.
Oxidation state of cobalt | Oxidation state of |
Electronic configuration of cobalt | Electronic configuration of nickel |
 Q 8 1 NH3Being a Strong Field Ligang Causes the Pairing Loading image••• being a strong field ligand causes the pairing. Therefore, can undergo hybridization.  Q 8 2 Ni Can Undergo D2 sp3 Hybridization Loading image••• Hence, it is an inner orbital complex. |  Q 8 3 the Pairing, then Only One 3 Loading image••• If causes the pairing, then only one orbital is empty. Thus, it cannot undergo hybridization. Therefore, it undergoes hybridization.  Q 8 4 the Undergoes sp3 d2 Hybridization Loading image••• Hence, it forms an outer orbital complex. |
Q: 9. Predict the number of unpaired electrons in the square planar ion.
Answer
In this complex, is in the state. It forms a square planar structure. This means that it undergoes hybridization. Now, the electronic configuration of .
Q 10 the Electronic Configuration
being a strong field ligand causes the pairing of unpaired electrons. Hence, there are no unpaired electrons in
Q: 10. The hexaquo manganese(II) ion contains five unpaired electrons, while the hexacyanoion contains only one unpaired electron. Explain using Crystal Field Theory.
Answer:
Mn is in the oxidation state | Mn is in the oxidation state |
The electronic configuration is. | The electronic configuration is . |
The crystal field is octahedral. Water is a weak field ligand. Therefore, the arrangement of the electrons in is . | The crystal field is octahedral. Cyanide i a strong field ligand. Therefore, the arrangement of the electrons i is . |
Hence, hexaquo manganese (II) ion has five unpaired electrons | while hexacyanoion ion has only one unpaired electron. |
Q: 11. Calculate the overall complex dissociation equilibrium constant for the ion, given that for this complex is .
Answer:
The overall complex dissociation equilibrium constant is the reciprocal of the overall stability constant, .