The effect of temperature on the reaction rate of the reaction between sodium thiosulfate Na2S2O3 and hydrochloric acid HCl can be explained using the collision theory. According to this theory, as the temperature increases, the kinetic energy of the particles also increases, leading to more frequent and energetic collisions between the reactant molecules. This results in a higher probability of successful collisions, which in turn increases the reaction rate.The reaction between sodium thiosulfate and hydrochloric acid can be represented by the following balanced equation:Na2S2O3 aq + 2 HCl aq 2 NaCl aq + SO2 g + S s + H2O l To quantitatively measure the effect of temperature on the reaction rate, you can monitor the rate of disappearance of the reactant sodium thiosulfate or the rate of appearance of the product sulfur . One common method to do this is by measuring the time it takes for a certain amount of sulfur to be produced, which causes the solution to become cloudy or opaque.Here's a step-by-step procedure to perform this experiment:1. Prepare a series of water baths with different temperatures e.g., 10C, 20C, 30C, 40C, and 50C using a temperature-controlled water bath or ice and hot water.2. Prepare a standard solution of sodium thiosulfate and hydrochloric acid with known concentrations.3. Place a conical flask containing a fixed volume of sodium thiosulfate solution on a white surface or over a white paper with a black cross drawn on it.4. Add a fixed volume of hydrochloric acid to the flask and immediately start a timer.5. Observe the flask from above and stop the timer when the black cross is no longer visible due to the cloudiness caused by the formation of sulfur.6. Record the time taken for the cross to disappear for each temperature.7. Calculate the reaction rate by taking the reciprocal of the time taken for the cross to disappear rate = 1/time .8. Plot a graph of reaction rate against temperature to observe the effect of temperature on the reaction rate.The results should show that as the temperature increases, the reaction rate also increases, confirming the effect of temperature on the reaction rate between sodium thiosulfate and hydrochloric acid.