The stability constant K of the Ag ( CN ) 2 - is 5 . 5 × 10 18 while that for the corresponding Ag NH 3 2 + is 1 . 6 × 10 7 . Explain why Ag ( CN ) 2 - is more stable?

For a coordination compound, a stability constant( K ) is an equilibrium constant for the formation of a complex in solution. It is a measure of the strength of the interaction between the reagents that come together to form the complex. Higher the value of K , more is the thermodynamic stability of the complex. Given, The stability constant K of the Ag ( CN ) 2 - is 5 . 5 × 10 18 while that for the corresponding Ag NH 3 2 + is 1 . 6 × 10 7 . The K value of complex Ag ( CN ) 2 - is greater than the complex Ag NH 3 2 + , therefore Ag ( CN ) 2 - is more stable than the second one.

E M B I B E

Chemistry Standard 12>Chapter 9 - Coordination Compounds>Try This>Q 1

MEDIUM

12th Maharashtra Board

IMPORTANT

Earn 100

Draw enantiomers of $[Cr {(ox)}_{3}]^{3 -}$ .

Important Questions on Coordination Compounds

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 9 - Coordination Compounds>Try This>Q 2

Draw enantiomers and cis and trans isomers of

{[Cr {(H_{2} O)}_{2} {(ox)}_{2}]}^{-}

(where

ox = C_{2} {O_{4}}^{2 -}

).

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 9 - Coordination Compounds>Can you tell ?

Write linkage isomers of

{[Fe {(H_{2} O)}_{5} (SCN)]}^{+}

. Write their

IUPAC

names.

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 9 - Coordination Compounds>Can you tell ?

Can you write

IUPAC

names of isomers

[Co {({NH}_{3})}_{5} {SO}_{4}] Br

and

[Co {({NH}_{3})}_{5} Br] {SO}_{4}

?

MEDIUM

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 9 - Coordination Compounds>Use your brain Power

The stability constant $K$ of the ${[Ag (CN)_{2}]}^{-}$ is $5.5 \times 10^{18}$ while that for the corresponding ${[Ag {({NH}_{3})}_{2}]}^{+}$ is $1.6 \times 10^{7}$ . Explain why ${[Ag (CN)_{2}]}^{-}$ is more stable?