Ammonia, NH3, is a stronger ligand than Cl- but weaker than CN-. Complete the balanced equations for the reactions that are predicted to occur.
CoCl6^3- (aq) + CN- (aq) --->
Co(NH3)6^3+ (aq) + Cl- (aq) --->
Co(CN)6^3- (aq) + NH3 (aq) --->
And you don't understand what? From the problem I would expect Co(CN)6^3- and NR, NR.
To determine the balanced equations for the reactions, you need to understand the concept of ligands and their strengths. Ligands are molecules or ions that can form coordinate bonds with metal ions. The strength of a ligand refers to its ability to form a bond with a metal ion.
In this case, you need to determine the reactions between CoCl6^3-, CN-, and NH3. To do this, you can compare the strengths of the ligands involved. It is given that NH3 is stronger than Cl- but weaker than CN-.
Let's analyze each reaction:
1. CoCl6^3- (aq) + CN- (aq) →
Since CN- is a stronger ligand than Cl-, it will replace Cl- in the complex ion. The balanced equation can be written as:
CoCl6^3- (aq) + CN- (aq) → Co(CN)6^3- (aq) + Cl- (aq)
2. Co(NH3)6^3+ (aq) + Cl- (aq) →
Since NH3 is a stronger ligand than Cl-, it will displace Cl- in the complex ion. The balanced equation can be written as:
Co(NH3)6^3+ (aq) + Cl- (aq) → CoCl6^3- (aq) + NH3 (aq)
3. Co(CN)6^3- (aq) + NH3 (aq) →
Since CN- is stronger than NH3, it will not be replaced by NH3 in this reaction. Therefore, there is no reaction occurring in this case.
To summarize, the balanced equations for the reactions in this scenario are:
1. CoCl6^3- (aq) + CN- (aq) → Co(CN)6^3- (aq) + Cl- (aq)
2. Co(NH3)6^3+ (aq) + Cl- (aq) → CoCl6^3- (aq) + NH3 (aq)
3. Co(CN)6^3- (aq) + NH3 (aq) → No reaction.