The rate of the reaction between magnesium and hydrochloric acid can affect the yield of hydrogen gas produced in several ways. The reaction between magnesium Mg and hydrochloric acid HCl can be represented by the following balanced chemical equation:Mg s + 2HCl aq MgCl2 aq + H2 g In this reaction, magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas. The rate of the reaction depends on factors such as the concentration of hydrochloric acid, the surface area of magnesium, temperature, and the presence of any catalysts.1. Concentration of hydrochloric acid: Increasing the concentration of HCl will increase the rate of the reaction. This is because there will be more HCl molecules available to collide with magnesium atoms, resulting in more frequent successful collisions and faster production of hydrogen gas. However, the yield of hydrogen gas will remain the same, as long as there is enough magnesium to react with all the HCl.2. Surface area of magnesium: Increasing the surface area of magnesium e.g., by using a fine powder instead of a solid piece will also increase the rate of the reaction. This is because more magnesium atoms will be exposed to HCl, resulting in more successful collisions and faster production of hydrogen gas. Again, the yield of hydrogen gas will remain the same, as long as there is enough HCl to react with all the magnesium.3. Temperature: Increasing the temperature will increase the rate of the reaction, as the kinetic energy of the particles will be higher, leading to more frequent successful collisions between magnesium and HCl. This will result in faster production of hydrogen gas. The yield of hydrogen gas will remain the same, as long as the reaction goes to completion.4. Catalysts: The presence of a catalyst can also increase the rate of the reaction by providing an alternative reaction pathway with a lower activation energy. This will result in more successful collisions between magnesium and HCl, and faster production of hydrogen gas. The yield of hydrogen gas will remain the same, as long as the reaction goes to completion.In summary, while the rate of the reaction between magnesium and hydrochloric acid can be affected by factors such as concentration, surface area, temperature, and catalysts, these factors do not directly affect the yield of hydrogen gas produced. The yield of hydrogen gas will remain the same as long as there is enough of each reactant to react completely, and the reaction goes to completion.