The rate of a chemical reaction is influenced by several factors, including the concentration of reactants. In an iodine clock reaction, the reaction rate is determined by the concentrations of the reactants involved. The iodine clock reaction is a classic example of a reaction with a visible color change that occurs after a specific time, making it easy to measure the reaction rate.The iodine clock reaction involves two reactions:1. The slow reaction rate-determining step :H2O2 aq + 2 I aq 2 H2O l + I2 aq 2. The fast reaction:I2 aq + 2 S2O3 aq 2 I aq + S4O6 aq The overall reaction is:H2O2 aq + 2 S2O3 aq 2 H2O l + S4O6 aq To investigate the effect of varying the concentration of reactants on the reaction rate, you can perform a series of experiments by changing the initial concentrations of the reactants H2O2 and S2O3 while keeping other factors constant e.g., temperature, pressure, and volume .Here's a suggested procedure:1. Prepare a series of solutions with varying concentrations of H2O2 and S2O3. For example, you can prepare five solutions with different H2O2 concentrations while keeping the S2O3 concentration constant, and vice versa.2. Start the reaction by mixing equal volumes of the H2O2 and S2O3 solutions in a test tube or a cuvette.3. Monitor the time it takes for the solution to turn blue due to the formation of a starch-iodine complex . This is the "clock time."4. Calculate the reaction rate by taking the inverse of the clock time rate = 1/clock time .5. Plot the reaction rates against the initial concentrations of the reactants.According to the rate law, the reaction rate is directly proportional to the concentration of the reactants raised to their respective orders. For the iodine clock reaction, the rate law can be expressed as:Rate = k[H2O2]^m[S2O3]^nWhere k is the rate constant, m and n are the orders of the reaction with respect to H2O2 and S2O3, respectively.By analyzing the plots, you can determine the orders of the reaction with respect to each reactant and understand how the change in the ratio of reactants affects the rate of the iodine clock reaction. Generally, increasing the concentration of reactants will increase the reaction rate, but the exact relationship depends on the reaction orders m and n .