1. CHM 101/102 Laboratory Manual Stoichiometry: Loss of CO 2 General Chemistry 101/102 Laboratory Manual University of North Carolina at Wilmington

2. CHM 101/102 Laboratory Manual Stoichiometry: Loss of CO 2 Purpose Purpose  To apply the concept of limiting reactant to determine the stoichiometry of a reaction using the method of continuous variation. Safety Considerations Safety Considerations  You will be using 3 M H 2 SO 4 (sulfuric acid) in this experiment. This can cause severe chemical burns to your skin and burn holes in your clothes. Wipe up any spilled H 2 SO 4 immediately with wet paper towels.  All reagents used in this experiment can be safely poured down the drain. Flush with plenty of water.

3. CHM 101/102 Laboratory Manual Stoichiometry: Loss of CO 2 Procedure Procedure  Your instructor will assign you a set of trials to perform.  For each trial, weigh the appropriate amount of Na 2 CO 3 into a pre- weighed, clean, dry flask.  Measure out approximately 2.68 g of H 2 SO 4 in a small, dry beaker. Na 2 CO 3 (s) + H 2 SO 4 (aq) Na 2 SO 4 (aq) + H 2 O ( l ) + CO 2 (g)  Pour all of the H 2 SO 4 into the flask containing the Na 2 CO 3. After 3 minutes, weigh the flask again to determine the mass of the CO 2 (g) evolved.

4. CHM 101/102 Laboratory Manual mol Na 2 CO 3 used mol CO 2 produced Na 2 CO 3 (s) + H 2 SO 4 (aq) Na 2 SO 4 (aq) + H 2 O ( l ) + CO 2 (g) mol Na 2 CO 3 mol H 2 SO 4 mol CO 2 0.0019 0.0040 0.0081 0.012 0.016 0.020 0.024 0.008 0.002 0.004 0.008 Stoichiometry: Loss of CO 2 Analysis Analysis stoichiometric equivalence point