The intensity of light can affect the rate of reaction between hydrogen peroxide H2O2 and potassium iodide KI by increasing the energy available for the reaction to occur. This reaction is an example of a photochemical reaction, where light can play a role in the reaction process.The reaction between hydrogen peroxide and potassium iodide can be represented by the following equation:H2O2 + 2KI 2H2O + I2 + 2KOHIn this reaction, hydrogen peroxide is reduced to water, and iodide ions I- are oxidized to iodine I2 . The rate of this reaction can be influenced by various factors, including the concentration of the reactants, temperature, and the presence of catalysts.When light is introduced to the reaction, it can provide the energy needed to break the chemical bonds in the reactants, allowing the reaction to proceed more quickly. The intensity of the light can have a direct impact on the rate of the reaction. As the intensity of the light increases, the energy available for the reaction also increases, leading to a faster reaction rate.However, it is important to note that the effect of light intensity on the rate of reaction between hydrogen peroxide and potassium iodide may not be significant if other factors, such as the concentration of the reactants or the presence of catalysts, are more dominant in influencing the reaction rate.In summary, the intensity of light can affect the rate of reaction between hydrogen peroxide and potassium iodide by providing additional energy for the reaction to occur. As the intensity of light increases, the reaction rate may also increase, although other factors may play a more significant role in determining the overall rate of the reaction.