Q10(c). Chelate effect and entropy
(i) Write the following ligand-exchange reactions: 1. [Co(H₂O)₆]³⁺ + 6NH₃ → 2. [Co(H₂O)₆]³⁺ + 3en → (ii) Which of the reactions should have a larger ΔS°? (iii) Given that the Co–N bond length is approximately the same in both complexes, which reaction will have a larger equilibrium constant? Explain your choice.
Model answer
The free solution for 2024 answers questions 1, 2, 5, 6, 9 and 11, the ones picked in its time plan. Question 10 is answered in full in the Geo-Scientist Chemistry Paper I, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper I: Model Answers 2021 to 2025
- All eleven questions of each paper, with the question printed above its answer
- Titration, gravimetric and nuclear numericals worked with units; structures drawn
- Topic-wise weightage and a topic-wise index
Coverschelate effectentropy of chelationethylenediaminestability constantligand exchange
All parts of Question 10
- 10(a) Thermometric titration of Ca²⁺ and Mg²⁺10 marks
- 10(b) Fluoride masking of aluminium10 marks
- 10(c) Chelate effect and entropy10 marks