The reaction between hydrochloric acid HCl and sodium thiosulphate Na2S2O3 is a common experiment in chemistry to study reaction rates. The reaction produces a precipitate of sulfur S , sodium chloride NaCl , and water H2O , as well as sulfur dioxide gas SO2 . The balanced equation for the reaction is:2HCl aq + Na2S2O3 aq 2NaCl aq + S s + SO2 g + H2O l The effect of temperature on the reaction rate can be explained using the collision theory and the Arrhenius equation. As the temperature increases, the kinetic energy of the particles also increases, causing them to move faster and collide more frequently. This results in a higher probability of successful collisions with the appropriate orientation and energy to overcome the activation energy barrier, leading to an increase in the reaction rate.In general, for most chemical reactions, the reaction rate approximately doubles for every 10C increase in temperature. However, this is just a rough estimate, and the actual effect may vary depending on the specific reaction and conditions.Regarding safety, increasing the temperature may have several implications:1. Faster reaction rate: As mentioned earlier, a higher temperature leads to a faster reaction rate. This may cause the reaction to become more vigorous, which could lead to splashing or spilling of the chemicals if not handled carefully.2. Release of gas: The reaction produces sulfur dioxide gas, which is toxic and has a pungent odor. At higher temperatures, the gas will be released at a faster rate, increasing the risk of exposure. Proper ventilation and safety precautions should be taken to minimize exposure to the gas.3. Thermal hazards: Higher temperatures may pose a risk of burns or other thermal hazards. It is essential to use appropriate protective equipment, such as heat-resistant gloves and safety goggles, when handling hot solutions or apparatus.In conclusion, increasing the temperature of the reaction between hydrochloric acid and sodium thiosulphate will increase the reaction rate, but it may also introduce additional safety concerns. It is crucial to follow proper safety procedures and precautions when conducting experiments at elevated temperatures.