Stability of Coordination Compounds

What is the relationship between stability and instability constant?

Instability constant is the reciprocal of _____ 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.

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

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

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

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

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

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

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?

Select the incorrect statement.

Which of the following statements are correct regarding ${\left[\mathrm{Co}{\left(\mathrm{en}\right)}_2{\mathrm{Cl}}_2\right]}^{+} \mathrm{and} {\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$?

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 compound insoluble in acetic acid is

The most stable ion is

The most stable ion is

The most stable ion is