Limiting Reagent Investigation Introduction: In this lab a precipitate will be formed by mixing solutions of sodium carbonate and lead II nitrate. The solutions will be mixed in test tubes of uniform size, so that the amounts of precipitate produced can be compared by measuring the heights of the solids in the test tubes. You and a partner will be working with two other groups (total of 6 students). Each group will be responsible for two of the test tubes (A & B, C & D, E & F). Organize yourselves accordingly. You will only be dispensed 40 mL of each solution. Pre-lab: Write a balanced chemical equation (BCE) for this reaction (include states) Materials: ● 40 mL of 0.75 mol/L Two pipettes with pumps sodium carbonate solution ● 6 test tubes ● Test tube rack • 40 mL of 0.75 mol/L lead Il nitrate solution ● Ruler . Two labeled beakers Procedure: 1. Obtain 40 mL of each reactant from the front of the classroom. 2. Label 6 identical sized test tubes A-F. Check that diameters are equal. 3. Add the volume indicated on the data table using two separate pipettes to deliver appropriate volumes of each reactant to each test tube. Note: add the larger volume of solution second to ensure efficient mixing. 4. Gently mix the contents of each test tube without letting too much precipitate stick to the sides of the test tube. 5. Once the reagents have been mixed allow the solid precipitates to settle for about 3-5 minutes. Tap the tubes gently so the precipitate settles evenly (flat surface on top). 6. After the precipitate in each five test tubes has settled, use a metric ruler measure the height in mm of solid in each test tube. Record the height of each precipitate in the data table. Observations: Table 1.0: Height of precipitate obtained with variable lead II nitrate volumes at constant sodium carbonate volume Volume of sodium Volume of carbonate Lead Il nitrate 4.0 mL 1.0 mL 4.0 ml. 3.0 ml. 4.0 mL 5.0 mL 4.0 mL 7.0 mL 4.0 mL 9.0 mL 4.0 mL 11.0 mL Test tube A B C D E F Height of precipitate in mm
Limiting Reagent Investigation Introduction: In this lab a precipitate will be formed by mixing solutions of sodium carbonate and lead II nitrate. The solutions will be mixed in test tubes of uniform size, so that the amounts of precipitate produced can be compared by measuring the heights of the solids in the test tubes. You and a partner will be working with two other groups (total of 6 students). Each group will be responsible for two of the test tubes (A & B, C & D, E & F). Organize yourselves accordingly. You will only be dispensed 40 mL of each solution. Pre-lab: Write a balanced chemical equation (BCE) for this reaction (include states) Materials: ● 40 mL of 0.75 mol/L Two pipettes with pumps sodium carbonate solution ● 6 test tubes ● Test tube rack • 40 mL of 0.75 mol/L lead Il nitrate solution ● Ruler . Two labeled beakers Procedure: 1. Obtain 40 mL of each reactant from the front of the classroom. 2. Label 6 identical sized test tubes A-F. Check that diameters are equal. 3. Add the volume indicated on the data table using two separate pipettes to deliver appropriate volumes of each reactant to each test tube. Note: add the larger volume of solution second to ensure efficient mixing. 4. Gently mix the contents of each test tube without letting too much precipitate stick to the sides of the test tube. 5. Once the reagents have been mixed allow the solid precipitates to settle for about 3-5 minutes. Tap the tubes gently so the precipitate settles evenly (flat surface on top). 6. After the precipitate in each five test tubes has settled, use a metric ruler measure the height in mm of solid in each test tube. Record the height of each precipitate in the data table. Observations: Table 1.0: Height of precipitate obtained with variable lead II nitrate volumes at constant sodium carbonate volume Volume of sodium Volume of carbonate Lead Il nitrate 4.0 mL 1.0 mL 4.0 ml. 3.0 ml. 4.0 mL 5.0 mL 4.0 mL 7.0 mL 4.0 mL 9.0 mL 4.0 mL 11.0 mL Test tube A B C D E F Height of precipitate in mm
World of Chemistry, 3rd edition
3rd Edition
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter9: Chemical Quantities
Section: Chapter Questions
Problem 41A
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