Question

For the complex ${ML}_2$ stepwise formation constants for
$M+L\rightleftharpoons ML$
$ML+L\rightleftharpoons {ML}_2$
Are 4 and 3. Hence, overall stability constant for :
$M+2L\rightleftharpoons {ML}_2$ is ?

• A. 12
• B. 7
• C. 1.33
• D. 0.75

Answer 1

The correct option is A 12

$M+L\rightleftharpoons ML\Rightarrow K_1=4$

$ML+L \rightleftharpoons ML_2 \quad K_2=3$

$M+2L\rightleftharpoons M{L}_2\Rightarrow K_{eff}=K_1\times K_2$

$=4\times 3$

$=12$