Part A) The formation constant (Kf) of a complex depends on several factors, and

Question

Part A)

The formation constant (Kf) of a complex depends on several factors, and it can also communicate information about the complex. Which of the following statements about the formation constant are true?

Select All that Apply

Part B)

For the complex formation reaction where M is any metal and L is any ligand,

M++2L?[ML2]+

Kf is the formation constant for the complex at equilibrium and ?G? is the Gibbs free energy change for the reaction at equilibrium.The formation constant (Kf) can be related to the Gibbs free energy change (?G?) for a reaction by the equation

?G?=?RTln Kf

where T is the temperature in kelvins and R is the gas constant equal to 8.314 J?K?1?mol?1. The complex formation is generally a spontaneous process; thus, the Gibbs free energy change is negative.

Calculate the formation constant for the formation of [Ni(NH3)2(H2O)4]2+ from [Ni(H2O)6]2+, given that ?G? is ?29.0kJ?mol?1 at 298 K. Kf=?

Part C)

In calculating the concentration of [Cu(NH3)4]2+ from [Cu(H2O)4]2+, the stepwise formation constants are as follows:

K1=1.90104

K2=3.90103

K3=1.00103

K4=1.50102

Calculate the overall formation constant (Kf) for the formation of [Cu(NH3)4]2+from [Cu(H2O)4]2+. Kf=?

Explanation / Answer

Part A

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