Which of the following complexes formed by Cu2+ ions is most stable?(i – InterviewSolution

InterviewSolution

1.	Which of the following complexes formed by Cu2+ ions is most stable?(i) Cu2+ + 4NH3 → [Cu(NH3)4]2+, logK = 11.6(ii) Cu2+ + 4CN– → [Cu(CN)4]2–, logK = 27.3(iii) Cu2+ + 2en → [Cu(en)2]2+, logK = 15.4(iv) Cu2+ + 4H2O → [Cu(H2O)4]2+, logK = 8.9
Answer» (ii) Cu²⁺ + 4CN^– → [Cu(CN)₄]^2–, logK = 27.3

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