![]() Na 2S 2O 3 is the limiting reactant along the downward sloping line of the graph.ĥ. Along the upward sloping line of my graph, NaClO is the limiting reactant. In each ratio, the amount of reactants available limits the amount of reaction that occurs and the amount of heat that is produced, so if the volume is limited than the data will be less precise, because the ratios are further apart and can not be made at even closer intervals, to produce data that is more precise.Ĥ. While the total volume of the solution is kept constant at 50 mL, the volume of each reactant is varying in the different ratios. The precision of the data is limited by the measurement of volume. This reactant is completely consumed, and it therefore limits the amount of product that can be formed.ģ. The term "limiting reagent" refers to the reactant that is able to be completely consumed in a reaction. There can only be one independent variable in an experiment.Ģ. This ensured that the temperature change had to be a result of the quantity of reactants being consumed, because there would be the same total volume of reactants. During the experiment, a constant volume of reactants was kept to ensure that the total number of moles of the reaction was also constant. In a chemical equation, the stoichiometric ratio will allow the reaction to consume as many reactants as possible and form as much product as capable, so when the measurable property during a continuous variations experiment reflects the same idea, it is clear that this method is effective in finding the mole ratio. ![]() When temperature change is found to be at its highest, that identifies that the amount of product formed is at its highest, because this measurable product occurs as a result of maximum consumption of the reactants. ![]() The heat that is produced is directly proportional to the amount of reaction that is occuring this means that the temperature change is proportional to the quantity of reactants consumed. This specific experiment involved the occurence of an exothermic reation, so the measurable property was the heat given off and the temperature change of each ratio in comparison with the starting temperature. During the chemical reaction, these reactants will produce some sort of measurable property, be it color, a precipitate, or in this instance, heat. When using the method of continuous variations, the total number of moles is kept constant, but the ratios of the reactants are varied. However, the formula of the reactants and products are not always known. As previously stated, when given a balanced chemical equation the mole ratios of reactants and products is expressed by the coefficients of those formulas. The method of continuous variations allows you to find the mole ratio of reactants.
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