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

1.	Which of the following complexes formed by Cu2+ ions is most stable? (a) Cu2++4NH3→[Cu(NH3)4]2+, logK=11.6 (b) Cu2++4CN−→[Cu(CN)4]2−, logK=27.3 (c) Cu2++2en−→[Cu(en)2]2+, logK=15.4 (d) Cu2++4H2O→[Cu(H2O)4]2+, logK=8.9
Answer» Which of the following complexes formed by $C u^{2 +}$ ions is most stable? (a) $C u^{2 +} + 4 N H_{3} \to [C u (N H_{3})_{4}]^{2 +}, l o g K = 11.6$ (b) $C u^{2 +} + 4 C N^{-} \to [C u (C N)_{4}]^{2 -}, l o g K = 27.3$ (c) $C u^{2 +} + 2 e n^{-} \to [C u (e n)_{2}]^{2 +}, l o g K = 15.4$ (d) $C u^{2 +} + 4 H_{2} O \to [C u (H_{2} O)_{4}]^{2 +}, l o g K = 8.9$

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