Stoichiometry: Loss of CO2PowerPoint PresentationSlide 3Slide 4CHM 101/102CHM 101/102Laboratory ManualLaboratory ManualLaboratory ManualStoichiometry: Loss of COStoichiometry: Loss of CO22General Chemistry 101/102General Chemistry 101/102Laboratory ManualLaboratory ManualUniversity of North Carolina at WilmingtonUniversity of North Carolina at WilmingtonCHM 101/102CHM 101/102Laboratory ManualLaboratory ManualLaboratory ManualStoichiometry: Loss of COStoichiometry: Loss of CO22•PurposePurposeTo apply the concept of To apply the concept of limiting reactantlimiting reactant to to determine the stoichiometry of a reaction using the determine the stoichiometry of a reaction using the method of continuous variation. method of continuous variation. •Safety ConsiderationsSafety ConsiderationsYou will be using 3 M HYou will be using 3 M H22SOSO44 (sulfuric acid) in this (sulfuric acid) in this experiment. This can cause severe chemical experiment. This can cause severe chemical burns to your skin and burn holes in your clothes. burns to your skin and burn holes in your clothes. Wipe up any spilled HWipe up any spilled H22SOSO44 immediately with wet immediately with wet paper towels.paper towels.All reagents used in this experiment can be safely All reagents used in this experiment can be safely poured down the drain. Flush with plenty of water.poured down the drain. Flush with plenty of water.CHM 101/102CHM 101/102Laboratory ManualLaboratory ManualLaboratory ManualStoichiometry: Loss of COStoichiometry: Loss of CO22•ProcedureProcedureYour instructor will assign you a set Your instructor will assign you a set of trials to perform.of trials to perform.For each trial, weigh the appropriate For each trial, weigh the appropriate amount of Naamount of Na22COCO33 into a pre- into a pre-weighed, clean, dry flask.weighed, clean, dry flask.Measure out approximately 2.68 g of Measure out approximately 2.68 g of HH22SOSO44 in a small, dry beaker. in a small, dry beaker.Na2CO3(s) + H2SO4(aq) Na2SO4(aq) + H2O(l) + CO2(g)Pour all of the HPour all of the H22SOSO44 into the flask containing the into the flask containing the NaNa22COCO33. After 3 minutes, weigh the flask again to . After 3 minutes, weigh the flask again to determine the mass of the COdetermine the mass of the CO22(g)(g) evolved. evolved.CHM 101/102CHM 101/102Laboratory ManualLaboratory ManualLaboratory Manualmol Na2CO3 usedmol CO2 producedNa2CO3(s) + H2SO4(aq) Na2SO4(aq) + H2O(l) + CO2(g)mol Na2CO3 mol H2SO4 mol CO20.00190.00400.00810.0120.0160.0200.0240.0080.0080.0080.0080.0080.0080.0080.0020.0040.0080.0080.0080.0080.008Stoichiometry: Loss of COStoichiometry: Loss of CO22•AnalysisAnalysisstoichiometric equivalence