To analyze the effect on the equilibrium position of a redox reaction when the concentration of reactants is doubled and the concentration of products remains unchanged, we need to consider the reaction quotient Q and the equilibrium constant K for the reaction.Let's consider a general redox reaction:aA + bB cC + dDwhere A and B are reactants, C and D are products, and a, b, c, and d are their respective stoichiometric coefficients.The reaction quotient Q is given by:Q = [C]^c * [D]^d / [A]â * [B]^b where [A], [B], [C], and [D] are the concentrations of the respective species.The equilibrium constant K is the value of Q when the reaction is at equilibrium. If Q < K, the reaction will proceed in the forward direction to reach equilibrium, and if Q > K, the reaction will proceed in the reverse direction to reach equilibrium.Now, let's consider the given situation where the concentration of reactants A and B is doubled, while the concentration of products C and D remains unchanged. The new reaction quotient Q' will be:Q' = [C]^c * [D]^d / [2A]â * [2B]^b Q' = [C]^c * [D]^d / 2â * [A]â * 2^b * [B]^b Q' = 1 / 2^a+b * [C]^c * [D]^d / [A]â * [B]^b Q' = 1 / 2^a+b * QSince the concentration of reactants is doubled, the new reaction quotient Q' will be smaller than the initial reaction quotient Q by a factor of 1 / 2^a+b .Now, we need to compare Q' with K to determine the effect on the equilibrium position:- If Q' < K, the reaction will proceed in the forward direction to reach equilibrium, meaning that more reactants will be converted into products.- If Q' > K, the reaction will proceed in the reverse direction to reach equilibrium, meaning that more products will be converted back into reactants.However, since Q' is smaller than Q due to the increase in reactant concentrations, and the reaction was initially at equilibrium Q = K , it is more likely that Q' < K. In this case, the reaction will proceed in the forward direction to reach equilibrium, converting more reactants into products. This will result in an increase in the concentration of products and a decrease in the concentration of reactants until a new equilibrium is established.