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

${\mathrm{Ag}}^{+}+{\mathrm{NH}}_3\rightleftharpoons {\left[\mathrm{Ag}\left({\mathrm{NH}}_3\right)\right]}^{+}; {\mathrm{k}}_1=6·8\times {10}^{-3}$

${\left[\mathrm{Ag}\left({\mathrm{NH}}_3\right)\right]}^{+}+{\mathrm{NH}}_3\rightleftharpoons {\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}; {\mathrm{k}}_2=1.6\times {10}^{-3}$

then the formation constant of ${\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}$ is

The most stable complex among the following is

Define instability constant.

Define stepwise stability constant.

Out of ${\left[{\mathrm{CoF}}_6\right]}^{-3}$ and $[\mathrm{Co}{\left(\mathrm{en}\right)}_3{]}^{3+}$, which complex compound more stable.

Define instability constant of coordination compounds.

What is the relationship between stability and instability constant?

What is instability constant?

Define overall stability constant of a complex.

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 ?

The agent that keeps metals in the soluble state is called

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 ?

What is the chelation effect? Give an example.

Which among the following is incorrect statement regarding $\mathrm{A}={\left[\mathrm{Co}(\mathrm{en}{)}_2{\mathrm{Cl}}_2\right]}^{+}$ and $\mathrm{B}={\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_4{\mathrm{Cl}}_2\right]}^{+}$?

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

Number of the following statements is/are correct?
$\left(\mathrm{A}\right)$ Greater the stability constant of a complex ion, greater is its stability
$\left(\mathrm{B}\right)$ Greater the oxidation state of the central metal ion, greater is the stability of the complex
$\left(\mathrm{C}\right)$ CO stabilizes complex because of its synergic Bonding.
$\left(\mathrm{D}\right)$ Chelate complexes have low stability constants

In the complexes ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+},\mathrm{ }{\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{3-},\mathrm{ }{\left[\mathrm{Fe}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]}^{3-}\mathrm{ }\mathrm{and}\mathrm{ }{\left[{\mathrm{FeCl}}_6\right]}^{3-},$ more stability is shown by

Point out incorrect stability order