QuestionCoordination chemistry / chelate effect
Consider the following 3-step reaction :
[Ni(H₂O)₆]²⁺ + en ⟶ [Ni(en)(H₂O)₄]²⁺ + 2H₂O
[Ni(en)(H₂O)₄]²⁺ + en ⟶ [Ni(en)₂(H₂O)₂]²⁺ + 2H₂O
[Ni(en)₂(H₂O)₆]²⁺ + en ⟶ [Ni(en)₃]²⁺ + 2H₂O
Which one of the following statements is correct for the overall balanced reaction of the above 3-step reaction ?
- (a) Number of molecules on product side will be greater than the number of molecules on the substrate side indicating increase in entropy with more chelation.
- (b) Number of molecules on product side will be less than the number of molecules on the substrate side indicating decrease in enthalpy with more chelation.
- (c) Number of molecules on product side equals the number of molecules on the substrate side indicating no change in enthalpy and chelation.
- (d) Number of molecules on product side will be greater than the number of molecules on the substrate side indicating increase in enthalpy with less chelation.
Part of VKC Basic
Read the answer and its explanation with VKC Basic
VKC Basic (₹999 for 6 months) opens every solved answer, the notes, the handbook and the daily answer archive. Every Mains test series includes it.