Stability Constants Flashcards
Complexes are typically formed from aqueous solutions of their ____ ____
metal halides
When complexes are formed from an aqueous solution of their metal halide what must you keep in mind about the ligand compared to the solvent?
The ligand must be thermodynamically favoured over the solvent
In coordination chemistry, the equilibrium constants, K,
are called ___ or ____ ____
Stability or Formation Constants
K is the concentration of the ___ over the _____
products
reactants
The k’s are called the ____ stability constants and the β’s are called the ____ stability constants
stepwise
overall
What is le chateliers principle
if a system at equilibrium is exposed to a stress (change in concentration, temperature, pressure etc) it will shift so as to return to equilibrium
What is the Irving-Williams order?
Mn2+ < Fe2+ < Co2+ < Ni2+ < Cu2+ > Zn2+
where CU2+ and Zn2+ has an exception
What is the reason for K values increasing moving right across a row?
Z/r increases so covalent character increases so the complex is more stable so products are favoured which means the K value is higher
The stronger the Ionic potential the ____(lower/higher) the k value
higher
Why does the k value increase with increasing oxidation state?
Because the with the increase in oxidation state the ionic potential increases (Z/r) so porducts are more stable so the k value is higher
Experimental data shows that complexes of chelating ligands are, in general, ___(less/more) stable than complexes containing an equivalent number of equivalent ligands of lower denticity ligands
more
How many atoms in EDTA bind to one metal center?
6
are 5 or 6 membered rings more stable?
5 memembered rings are more stable (unlike ochem)
