L1 /
12
CH1012
FORMATION CONSTANT
• Coordination
compounds are often formed
by metathesis reactions (often also redox).
eg. Ni2+(aq) + 2dmg-(aq) D [Ni(dmg)2](aq)
by metathesis reactions (often also redox).
eg. Ni2+(aq) + 2dmg-(aq) D [Ni(dmg)2](aq)
• This is a type of
metathesis reaction, the product formed is a weak electrolyte.
• Complex ions (eg. Ag(NH3)2+) in
solution always show some
degree of dissociation.
eg. Ag+(aq) + 2NH3(aq) D [Ag(NH3)2]+(aq)
eg. Ag+(aq) + 2NH3(aq) D [Ag(NH3)2]+(aq)
• We will work with a special equilibrium constant called the formation
constant Kf to
describe the extent of dissociation.
describe the extent of dissociation.
