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The experiment will focus on the instantaneous reaction between an aqueous solution of Sodium Hydroxide NaOH and an aqueous solution of Calcium dichloride CaCl2 The amount of NaOH will be kept constant throughout the experiment however the amount of aqueous CaCl2 solution will changed gradually Initially NaOH will be in excess but while the experiment continues and as the amount of aqueous CaCl2 increases it will become the limiting reagent The point of the experiment is to demonstrate the principles of stoichiometry and give a real life situation where the effects of limiting reagents can be viewed Stoichiometry is the numerical relationship between reactants and products molecules Since every stoichiometry equation must be balanced the mole to mole ratio can be derived from the chemical equation This is very important to experimental chemistry because it allows for the general composition of molecules to be known as well as the way the molecules will combine This information is useful for chemical experiments because it allows the right proportions to be used in an experiment as to not have excess of a certain chemical element Stoichiometry also helps deal with problems- regarding reactions Sometimes there may be too much of one substance the excess reagent or too little of the other substance the limiting reagent to have the reaction go as planned By utilizing the balanced stoichiometric coefficients one can avoid having excess of a substance and a limiting reagent By utilizing balanced stoichiometric coefficients one can not only deduce how much of each substance will be needed for a complete reaction but also the amount of product the reaction will yield this called the theoretical yieldHowever no experiment is perfect There will almost always be some sort of human error or environmental factor that affects the experiment Therefore the actual amount that will be produced from the reaction will either be a little more than what was expected from the theoretical yield or a little
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