Stability of Coordination Compounds

In the complexes  ${\left[\mathrm{Fe}{\left({\mathrm{H}}_{\mathrm{2}}\mathrm{O}\right)}_{\mathrm{6}}\right]}^{\mathrm{3}+},\mathrm{ }{\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_{\mathrm{6}}\right]}^{\mathrm{3}–},\mathrm{ }{\left[\mathrm{Fe}{\left({\mathrm{C}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{4}}\right)}_{\mathrm{3}}\right]}^{\mathrm{3}–}\mathrm{and} {\left[{\mathrm{FeCl}}_{\mathrm{6}}\right]}^{\mathrm{3}–},$  more stability is shown by

On the basis of stability of complex ion in the solution, complexes may be of two types, perfect and imperfect complexes. The stability depends upon the extent of dissociation which in turn depends upon the strength of metal-ligand bond. The stability of complex also depends upon charge on central metal  atom, basic nature of ligand, chelation, and nature of metal ion and ligand according to $\mathrm{HSAB}$ principle.

Which complex is most stable ?

Consider the following equilibrium

 $\text{AgCl}\downarrow +{\text{2NH}}_3\rightleftharpoons {\left[\text{Ag}{\left({\text{NH}}_3\right)}_2\right]}^{+}+{\text{Cl}}^{-}$

White precipitate of AgCl appears on adding which of the following ?

Consider the following equilibrium

 $\text{AgCl}\downarrow +{\text{2NH}}_3\rightleftharpoons {\left[\text{Ag}{\left({\text{NH}}_3\right)}_2\right]}^{+}+{\text{Cl}}^{-}$

White precipitate of AgCl appears on adding which of the following ?

Which complex in the following has the highest stability constant at 298 K?

Compare R.E.B.(Rotational Energy Barrier) for the given molecules:

$\mathrm{i}.$ $\mathrm{M}\mathrm{e}-\mathrm{C}\mathrm{H}=\mathrm{C}\mathrm{H}-\mathrm{M}\mathrm{e}$

$\mathrm{i}\mathrm{i}.$ $\mathrm{M}\mathrm{e}-\mathrm{C}\mathrm{H}=\mathrm{C}\mathrm{H}-\mathrm{O}-\mathrm{M}\mathrm{e}$

$\mathrm{i}\mathrm{i}\mathrm{i}.$ ${\mathrm{O}}_2\mathrm{ }\mathrm{N}-\mathrm{C}\mathrm{H}=\mathrm{C}\mathrm{H}-\mathrm{O}\mathrm{M}\mathrm{e}$

$\mathrm{i}\mathrm{v}.$ $\mathrm{M}\mathrm{e}-\mathrm{C}{\mathrm{H}}_2-\mathrm{C}{\mathrm{H}}_2-\mathrm{M}\mathrm{e}$

Of the following complex ion, the one that probably has the largest overall formation constant, ${\mathrm{K}}_{\mathrm{f}}$ , is

Ammonia forms the complex ion ${\left[\mathrm{C}\mathrm{u}{\left(\mathrm{N}{\mathrm{H}}_3\right)}_4\right]}^{2+}$with copper ions in alkaline solution but not in acidic solution. What is the reason for it?

What is the overall formation equilibrium constant for the ion${\left[M{L}_4\right]}^{2-}$ ion, given that ${\mathrm{\beta }}_4$ for this complex is $2.5⨯{10}^{13}$?

What is the ratio of uncomplexed to complexed Zn²⁺ ion in a solution that is 10 M NH₃. if the stability constant of [Zn(NH₃)₄]²⁺ is 3 × 10⁹ ?

What is the ratio of uncomplexed to complexed ${\mathrm{Zn}}^{2+}$ ion in a solution that is $10 \mathrm{M}$ in ${\mathrm{NH}}_3$, if the stability constant of ${\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$ is $3\times {10}^9$?

The most stable ion is

The most stable ion is

The most stable ion is