The formation constant for [Cu(en)2(H2O)2]2+ from [Cu(H2O)6]2+ is 2.53 x 10^19 at 298 K with ΔG∘ of -111.8 kJ·mol−1.
How to calculate formation constant?
The formation constant (Kf) for the formation of [Cu(en)2(H2O)2]2+ from [Cu(H2O)6]2+ is calculated to be 2.53 x 10^19.
This calculation is based on the ΔG∘ value of -111.8 kJ·mol−1 given for the formation reaction at a temperature of 298 K.
The relationship between ΔG∘ and Kf is given by the equation
Kf = e^(-ΔG∘/RT),
where
- R is the gas constant and
- T is the temperature in Kelvin.
High value of Kf suggests that the formation of [Cu(en)2(H2O)2]2+ is a very strong complexation reaction.