The reaction between hydrochloric acid HCl and sodium thiosulphate Na2S2O3 can be represented by the following balanced equation:2HCl aq + Na2S2O3 aq 2NaCl aq + H2O l + SO2 g + S s In this reaction, hydrochloric acid reacts with sodium thiosulphate to produce sodium chloride, water, sulfur dioxide, and solid sulfur. The reaction rate is affected by the concentration of the reactants, temperature, and the presence of catalysts.When the concentration of the reaction products sodium chloride, water, sulfur dioxide, and solid sulfur is changed, it can affect the reaction rate according to Le Chatelier's principle. Le Chatelier's principle states that when a system at equilibrium is subjected to a change in concentration, temperature, or pressure, the system will adjust itself to counteract the change and restore a new equilibrium.In the context of this reaction, if the concentration of the products is increased, the reaction will shift to favor the formation of the reactants HCl and Na2S2O3 to counteract the change. This means that the reaction rate will decrease as the system tries to restore equilibrium by consuming the excess products.Conversely, if the concentration of the products is decreased, the reaction will shift to favor the formation of more products, which will increase the reaction rate as the system tries to restore equilibrium by producing more products.It is important to note that these effects are observed when the reaction is at or near equilibrium. If the reaction is far from equilibrium, the effect of changing the concentration of products on the reaction rate may not be as significant.