Which Compound Stoichiometry and Limiting Reagent

Which Compound Stoichiometry and Limiting Reagent - Which...

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Which Compound? Stoichiometry and Limiting Reagent Introduction: The mass relationships among reactants and products in a chemical reaction represent the stoichiometry of the reaction. Chemicals react according to stoichiometric coefficients in their chemical reactions. Only a certain amount of product can be formed from a given quantity of starting material. The reactant which limits the amount of product produced in a chemical reaction is called the limiting reagent. The limiting reagent in a reaction is completely consumed – there is nothing of it left when the reaction is over. The amount of product that is formed reaches a maximum when the proper molar amounts of each reagent are added together. The formula for the product is then determined by making a plot of mole fraction versus amount of product. The mole fraction at the maximum amount of product in such a plot will indicate the product formula. The mole fraction, X, expresses the ratio of the number of moles of one component to the number of moles of all components present. Procedure: Obtain 70mL of 0.6 M BaCl 2 and 70mL 0.6 M (NH 4 ) 2 HPO 4 in two 250mL beakers. Obtain six clean and dry 15mL test tubes and be sure they fit in the centrifuge. If the test tubes are dirty, clean them with soap and a brush, rinse them well with deionized water and place them in a beaker to dry in the oven for 5-10 min. Mark each test tube with a number and weigh it.
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As indicated in Table I, add 2.0 to 12.0 mL BaCl 2 solution via a 10mL graduated cylinder to the test tubes. Then rinse the graduated cylinder well with deionized water
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Which Compound Stoichiometry and Limiting Reagent - Which...

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