The reaction between potassium permanganate KMnO4 and oxalic acid C2H2O4 in acidic solution can be represented by the following balanced equation:2 KMnO4 + 5 C2H2O4 + 6 H2SO4 2 MnSO4 + 10 CO2 + 8 H2O + 6 K2SO4In this reaction, potassium permanganate acts as an oxidizing agent, while oxalic acid acts as a reducing agent. The reaction rate depends on various factors, such as concentration, temperature, and presence of catalysts. However, the intensity of light can also play a role in the reaction rate.The effect of light intensity on the reaction rate can be explained by the photochemical activation of the reactants. When light is absorbed by the reactants, it can promote them to higher energy states, making them more reactive. This can lead to an increase in the rate of the reaction. In the case of the reaction between potassium permanganate and oxalic acid, the absorption of light by the permanganate ions can lead to the formation of more reactive species, which can then react with the oxalic acid at a faster rate.To study the effect of light intensity on the reaction rate, you can perform a series of experiments under different light intensities. You can use a light source with adjustable intensity or perform the experiments under different distances from the light source to vary the intensity. You can then measure the reaction rate by monitoring the decrease in the concentration of potassium permanganate or the increase in the concentration of one of the products, such as manganese sulfate, over time.By plotting the reaction rate against the light intensity, you can determine the relationship between the two variables. If the reaction rate increases with increasing light intensity, it suggests that the reaction is indeed affected by the photochemical activation of the reactants. However, if there is no significant change in the reaction rate with varying light intensity, it indicates that the reaction is not significantly influenced by the presence of light.In summary, the intensity of light can affect the rate of the reaction between potassium permanganate and oxalic acid in acidic solution by promoting the reactants to higher energy states, making them more reactive. To determine the relationship between light intensity and reaction rate, you can perform experiments under different light intensities and monitor the changes in the concentration of the reactants or products over time.