theoreticalyield：1021的理论产率

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1、DRAFTDOCUMENTLAB21PERCENTYIELDOFASALTTheproductivityofachemicalreactionismeasuredintermsofproductyieldjustastheproductivityofafarmismeasuredincropyield.Becauseexperimental/growingconditionswillvary,theactualyieldofproduct/cropoftendiffersfromtheexpectedyieldofproduct/crop.Onecancalculatethe%yielda

2、sameansofcomparingtheactual(experimental)yieldandexpected(theoretical)yieldbyusingthefollowingequation:%yield=experimentalyieldx100theoreticalyieldInthisactivity,youwillbecomeanindustrialchemist.Youwillexperimentallydeterminethemassofaproductinachemicalreactionandthencomparethismasstothetheoretica

3、lmassyouwouldpredictbasedonthechemicalequation.Thenyouwillassessthereliabilityofthedatabyperforminganerroranalysis.OBJECTIVESWhenyouhavecompletedthisactivity,youwillbeableto:1.Demonstrateaprocedureandcollectdatatodeterminetheexperimentalyieldofareactionproduct.2.Differentiatebetweenexperimentalyie

4、ldandtheoreticalyield.3.Computethetheoreticalyieldofareactionproductusingabalancedequation.4.Calculatethepercentyieldofasaltusingexperimentaldata.5.Performanerroranalysis.MATERIALSGogglesIronringBalance,sensitivetoatleast0.01gEvaporatingdishWatchglasssodiumbicarbonate(NaHCO3)CrucibletongsRingstand

5、3.0MHClBurnerCoolingmatDropperWiregauze141DRAFTDOCUMENTLAB21PROCEDURE1.Cleananddryanevaporatingdishandwatchglass.Todrytheevaporatingdishandwatchglass,usetongstoholdthemintheburnerflameforabout20seconds,allowtocool,anddeterminethemassoftheevaporatingdishandwatchglasscover.Recordthemassmeasurementin

6、theDataTableinentry#2.Repeatthisheating,cooling,andmassmeasurementprocessuntilthemassisconstant.Constantmassisattainedwhenthetwomassesagreewithin+0.01g.RecordthemassmeasurementsintheDataTableinentry#3and,ifnecessary,inentry#4.2.Withthedryevaporatingdishandwatchglassbalanced,setthebalance2gramsheav

7、ierandaddsolidNaHCO3untilthebalancebeginstoswing.Adjustthebalanceanddeterminethemassaccurately.Recordthecombinedmassofthedryevaporatingdish,watchglass,andNaHCO3solidinthedatatableinentry#1.3.RecordthemassoftheNaH