The mass of the solid product is 0.15 gram. The precipitate is filtered, washed and dried. The side arm of the Erlenmeyer can break.Ĭentigram balance, ring stand, O-ring, funnel, filter paper, clay triangle, spatula, stirring rod, 50-mL graduated cylinder, two 150-mL beakers, watch glass, pencil, solid sodium carbonate, 0.50 M sodium carbonate solution.Ī student adds 30.0 mL of 0.10 M potassium chromate into a beaker containing 100.0 mL 0.010 M silver nitrate solution. If your instructor recommends you use vacuum filtration, proceed with caution. ![]() But, you MUST wash your hands after you finish the experiment.ģ. All chemicals used in these experiments are generally recognized as safe. ( aq) and ( s) mean aqueous and precipitate or solid, respectively.Ģ. The net ionic equation of the reaction is: The balanced equation for this chemical reaction is: CaCl2( aq) + Na2CO3( aq) CaCO3( s) + 2NaCl( aq) From the actual amount of calcium carbonate obtained, you can then calculate your percent yield of reaction. From the amounts of the reactants, you will determine which reactant is the limiting reactant, and from this amount, will calculate the theoretical yield of calcium carbonate produced. You will prepare calcium carbonate, CaCO3, from the reaction of aqueous solution of sodium carbonate, Na2CO3, with the aqueous solution of calcium chloride, CaCl2. ![]() In this experiment, you will react Na2CO3 and CaCl2. The percent yield of a reaction is then given by the following expression: The amount of product obtained in a chemical reaction performed in the laboratory is called the actual yield. This may not be always the case and the amount of product obtained in a chemical reaction is usually less than the theoretical amount. ![]() In other words, it is the maximum amount of product that can be obtained in a particular reaction from a known quantity of reactants. This is the theoretical yield of the reaction. A balanced chemical equation helps the chemist to calculate the amounts of product formed in a chemical reaction. Stoichiometric calculations are about the amounts of substances that react (reactants) and form (products) in chemical reactions.Ĭhemical reactions are represented by equations which are balanced using the smallest wholenumber coefficients. Stoichiometry is the mole to mole relationships between the reactants and the products of a chemical reaction. Students will be able to identify the limiting and excess reactants. Students will be able to predict the amount of product produced from a double displacement reaction and determine the percent yield of a chemical reaction.Ģ.
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