The effect of temperature on the reaction rate between hydrochloric acid and sodium thiosulphate is governed by the collision theory and the Arrhenius equation. As the temperature increases, the kinetic energy of the particles increases, leading to more frequent and energetic collisions between the reactant molecules. This results in an increased reaction rate.In the reaction between hydrochloric acid and sodium thiosulphate, the products formed are sodium chloride, sulfur dioxide, water, and sulfur. The balanced equation for this reaction is:HCl aq + Na2S2O3 aq 2NaCl aq + SO2 g + H2O l + S s Safety concerns in this reaction mainly arise from the release of sulfur dioxide gas, which is toxic and has a pungent odor. Additionally, hydrochloric acid is a strong acid and can cause burns if not handled properly.To control the reaction for improved safety, the temperature can be manipulated. Lowering the temperature will slow down the reaction rate, reducing the rate at which sulfur dioxide is produced. This can help in better handling and containment of the gas. However, it is essential to strike a balance between safety and reaction efficiency, as lowering the temperature too much may result in an undesirably slow reaction.Furthermore, proper ventilation and the use of personal protective equipment PPE such as gloves, goggles, and lab coats should be employed when handling these chemicals. It is also important to work in a well-ventilated area or under a fume hood to minimize exposure to sulfur dioxide gas.In summary, the effect of temperature on the reaction rate between hydrochloric acid and sodium thiosulphate can be used to control the reaction for improved safety by lowering the temperature to reduce the rate of sulfur dioxide production. However, it is crucial to balance safety with reaction efficiency and always follow proper safety protocols when handling chemicals.