The water exchange rates for the complex ions follow the order · ABC26IN0391
Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Easy
The water exchange rates for the complex ions follow the order
(a)$\mathrm{[V(H_2O)_6]^{2+} > [Co(H_2O)_6]^{2+} > [Cr(H_2O)_6]^{3+}}$
(b)$\mathrm{[Cr(H_2O)_6]^{3+} > [Co(H_2O)_6]^{2+} > [V(H_2O)_6]^{2+}}$
(c)$\mathrm{[Co(H_2O)_6]^{2+} > [Cr(H_2O)_6]^{3+} > [V(H_2O)_6]^{2+}}$
(d)$\mathrm{[Co(H_2O)_6]^{2+} > [V(H_2O)_6]^{2+} > [Cr(H_2O)_6]^{3+}}$
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Water exchange: [Co(H₂O)₆]²⁺ (~10⁶ s⁻¹) > [V(H₂O)₆]²⁺ (d³, ~10² s⁻¹) > [Cr(H₂O)₆]³⁺ (d³, ~10⁻⁶ s⁻¹) (d).
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