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Complex-Ion Equilibria. In general, chemical equilibrium is reached when the forward reaction rate is equal to the reverse reaction rate and can be described using an equilibrium constant, K. Complex ion equilibria are no exception to this and have their own unique equilibrium constant.
Small, highly charged metal ions have the greatest tendency to act as Lewis acids and form complex ions. The equilibrium constant for the formation of the complex ion is the formation constant ( Kf ). The formation of a complex ion by adding a complexing agent increases the solubility of a compound.
We begin our discussion of solubility and complexation equilibriums —those associated with the formation of complex ions—by developing quantitative methods for describing dissolution and precipitation reactions of ionic compounds in aqueous solution.
The equilibrium constant for the reaction of the components of a complex ion to form the complex ion in solution is called a formation constant (Kf) (sometimes called a stability constant). For example, the complex ion Cu(CN)2− Cu ( CN) 2 − is shown here: It forms by the reaction:
25 de feb. de 2021 · This chemistry video tutorial provides a basic introduction into complex ion equilibria. The first problem asks you to write the equations for the stepwise formation of Ag [NH3]+ and Ag...
About. Transcript. Calculating the solubility of silver chloride in pure water and 3.0 M ammonia. Calculating new equilibrium constant to account for formation of complex ion. Created by Jay. Questions. Tips & Thanks. Want to join the conversation? Log in. Sort by: Top Voted. Erkin Otles. 9 years ago.
Small, highly charged metal ions have the greatest tendency to act as Lewis acids and form complex ions. The equilibrium constant for the formation of the complex ion is the formation constant (K f). The formation of a complex ion by adding a complexing agent increases the solubility of a compound.
