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Exploring the Stoichiometry of Sodium Chloride Yield from Sodium Bicarbonate

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This laboratory experiment focuses on the stoichiometry of synthesizing sodium chloride (NaCl) from sodium bicarbonate (NaHCO3) and hydrochloric acid (HCl). Students will calculate the theoretical yield of NaCl, experimentally determine its actual yield, and calculate the percentage yield. The procedure involves writing a balanced chemical equation, measuring the masses of reactants and products, and performing stoichiometric calculations to understand the yield of the reaction. Students will document their data, conduct multiple trials, and analyze sources of error for improvement.

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Exploring the Stoichiometry of Sodium Chloride Yield from Sodium Bicarbonate

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Presentation Transcript

  1. Soda Stoich Lab An exploration of theoretical, actual, and % yield

  2. Soda Stoich Lab- Purpose • Calculate the theoretical yield of NaCl based on a known mass of NaHCO3 • Experimentally determine the actual yield of NaCl • Calculate the %Yield for your experiment NaHCO3(s) + HCl(aq)  NaHCO3(s) + HCl(aq)  NaCl(aq) + H2CO3(g) NaHCO3(s) + HCl(aq)  NaCl(aq) + H2O(l) + CO2(g)

  3. Soda Stoich Lab- Procedure This lab will be graded using sections 2 (Data Collection) and 3 (Conclusion) of the Lab Rubric • Write a balanced chemical equation for the reaction between NaHCO3 and HCl • Find the mass of the evaporating dish and watch glass. Record this mass • Add about 1/4t of baking soda (NaHCO3) to the dish. Record the total mass • Calculate the mass of NaHCO3 in your dish • Calculate the theoretical yield of NaCl using stoichiometry • Use a dropper to drip HCl down the spout of the dish. Keep adding HCl until bubbling ceases • Leaving the watch glass on, boil off the excess liquid until only NaCl remains • Let the dish cool for 5 minutes, then weigh it again with the watch glass. Record this mass • Share data to get at least 3 trials • Calculate the mass of NaCl produced • Calculate the %yield for your trial • Turn in: data table, work for calculations, graph, conclusion, sources of error and improvements

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