Direction: The dissociation of complex may be expressed as \[{{[M{{L}_{x}}]}^{4+}}\,+xL\] and equilibrium constant of this is known as instability constant which is a measure of stability. The stability of complex depends on EAN of central atom, charge on metalion, basic nature of ligand and chelation. |
A) \[{{[Cu\,{{(CN)}_{2}}]}^{-}}\,{{K}_{d}}=1\times {{10}^{-16}}\]
B) \[{{[Fe{{(CN)}_{6}}]}^{4-}}{{K}_{d}}=1\times {{10}^{-37}}\]
C) \[{{[Fe{{(CN)}_{6}}]}^{3-}}{{K}_{d}}=1\times {{10}^{-44}}\]
D) \[[Ag{{(CN)}_{2}}^{-}{{K}_{d}}=1\times {{10}^{-20}}\]
Correct Answer: C
Solution :
Stability constant, \[{{K}_{s}}=\frac{1}{{{K}_{d}}}=1\times {{10}^{44}}\] Thus, \[{{[Fe\,{{(CN)}_{6}}]}^{3-}}\] is the most stable among the given.You need to login to perform this action.
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