Final answer:
When solving the 'C' row of an ICE table, it's crucial to determine the reaction's direction toward equilibrium, express changes in proper stoichiometric ratios and substitute these into the Keq expression to find equilibrium concentrations.
Step-by-step explanation:
When solving the 'C' row of an ICE table, which stands for Initial, Change, and Equilibrium, it is important to first identify the direction in which the reaction will proceed to reach equilibrium. The 'C' row signifies the Change in concentration or pressure of reactants and products as the system moves towards equilibrium, and must be expressed in the proper stoichiometric ratio represented by the balanced chemical equation. Once the direction is established, appropriate algebraic expressions (often involving a variable like 'x') are used to denote the amount of change for each species involved in the reaction. After setting up these expressions, they are substituted into the 'E' row and into the equilibrium constant expression (Keq) to derive an algebraic equation. This equation is then solved to find the equilibrium concentrations of all species in the reaction.