The effect of temperature on the rate of reaction between hydrochloric acid and magnesium can be explained using the collision theory. According to this theory, for a reaction to occur, the reactant particles must collide with each other with sufficient energy, called the activation energy, and with the correct orientation. When the temperature increases, the kinetic energy of the particles also increases, leading to more frequent and energetic collisions between the reactant particles.In the case of the reaction between hydrochloric acid HCl and magnesium Mg , the reaction can be represented by the following equation:Mg s + 2HCl aq MgCl2 aq + H2 g As the temperature increases, the rate of this reaction will also increase due to the increased frequency and energy of collisions between the HCl and Mg particles. This results in a faster production of magnesium chloride MgCl2 and hydrogen gas H2 .Regarding the profitability of the reaction, it depends on various factors such as the cost of raw materials, energy consumption, and the market value of the products. If the increased rate of reaction at higher temperatures leads to a significant reduction in production time and energy consumption, it could potentially increase the profitability of the reaction. However, if the cost of maintaining a higher temperature outweighs the benefits of the increased reaction rate, it may not be economically viable.Additionally, the safety and stability of the reaction at higher temperatures should also be considered. If the reaction becomes too vigorous or uncontrollable at higher temperatures, it could pose safety risks and lead to equipment damage, which would negatively impact profitability.In conclusion, the effect of temperature on the rate of reaction between hydrochloric acid and magnesium is that it increases the reaction rate. The impact on profitability depends on various factors such as raw material costs, energy consumption, product value, and safety considerations. To determine the optimal temperature for the reaction, a thorough cost-benefit analysis should be conducted, taking all these factors into account.