The reaction between iodine I2 and iodide ions I- can be represented by the following balanced chemical equation:I2 aq + 2I- aq 3I- aq This reaction represents the formation of triiodide ions I3- from iodine and iodide ions. The equilibrium constant expression for this reaction can be written as:Kc = [I3-] / [I2] * [I-]^2 To calculate the equilibrium constant Kc at a given temperature, we need the concentrations of the species involved in the reaction at equilibrium. Since this information is not provided, I cannot calculate the exact value of Kc. However, I can provide some general information.The reaction between iodine and iodide ions is an example of a weak oxidizing agent, as iodine is not a strong oxidizer. Therefore, the equilibrium constant Kc for this reaction is expected to be relatively small, indicating that the reaction does not proceed to a significant extent. The exact value of Kc will depend on the temperature, as the equilibrium constant is temperature-dependent.