The pH of the reaction mixture can significantly affect the rate of the reaction between hydrochloric acid HCl and magnesium ribbon Mg . The reaction between HCl and Mg can be represented by the following balanced chemical equation:Mg s + 2 HCl aq MgCl2 aq + H2 g In this reaction, magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas. The pH of the reaction mixture is directly related to the concentration of HCl in the solution. A lower pH indicates a higher concentration of HCl, while a higher pH indicates a lower concentration of HCl.The rate of the reaction between HCl and Mg is mainly influenced by the concentration of HCl. As the concentration of HCl increases, the rate of the reaction also increases. This is because there are more HCl molecules available to collide with the magnesium atoms, resulting in a higher probability of successful collisions and an increased rate of reaction.When the pH of the reaction mixture is low high HCl concentration , the rate of the reaction will be faster. Conversely, when the pH of the reaction mixture is high low HCl concentration , the rate of the reaction will be slower.In summary, the pH of the reaction mixture affects the rate of the reaction between hydrochloric acid and magnesium ribbon by influencing the concentration of HCl in the solution. A lower pH higher HCl concentration results in a faster reaction rate, while a higher pH lower HCl concentration results in a slower reaction rate.