观察法对量取液体体积的影响（effect of observation method on volume of liquid）

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1、观察法对量取液体体积的影响（Effectofobservationmethodonvolumeofliquid）ColumntreenavigationJointhecollectionSitemapHomeThesubjectteachingcurriculumteachingplanteachingreferencethesisteampreliminariesfinalresultsAosaiGalleryforummessageresourcescourseguidingclassroomcoachingexampleofextracurricularexperi

2、menttoexplorethebasisofinnovationofcollegeentranceexaminationquestionsZhentispecialdoubtssolvingpredictionofjuniormiddleschoolYourpresentposition:ChemistrycounselingStationcourseguidance"knowledgecanguide"arequiredtextTheeffectofobservationmethodonvolumeofliquid:hxfdzarticlesource:origina

3、lclicknumber:199updatetime:2008-12-18TheuseandaccuracyofliquidmeasuringtoolsTheflask,cylinder,pipette,liquidmeasuringburetismostcommonlyusedinchemicalexperimentsofmiddleschool,specificationstoscalelinebelowthemaximumcapacityoftheenergy(20C,mL)tosaid.Theflaskusedforthepreparationofacertain

4、volumeandacertainconcentrationofstandardsolutionorsamplesolution;thecylinderforroughlytheamountacertainvolumeofliquid,theaccuracyisonly0.1mL;pipetteusedintheanalysisoftheexactamountofdetectionofacertainvolumeofliquid;andtheburetteismainlyusedforaccuratelyanalysiscapacityofacertainvolumeof

5、liquidandtheamountofaccuratereadingtestthepipetteandtheaccuracyoftheburettecommonlyusedcanreach0.01mL.Two.Relationshipbetweeninstrumentcalibrationand"liquidcapacity"and"liquidoutflow"Thecapacitybottlebelongstothe"inflowtype"instrument.Thebottleismarkedwithacapacitybottleof"20DEGC,100mL",i

6、ndicating20degreescentigrade,Whenthelowestleveloftheliquidconcavesurfaceinthebottleandthecalibrationline(alsoknownasreticle)areinthesamehorizontalline,thevolumeoftheliquidis100mL;iftheliquidinthebottleiscompletelypouredout,thevolumeoftheliquidwillbelessthan100mL.Burets"0"scaleintheupperpa

7、rtoftheinstrument,thelargestscaleunderapieceofglasstubewithoutcalibration,whichbelongstothe"outflow"instrument.Asinthe25mLcapacityinburetteinsertedintoaliquid,willstartto"level0"scale,whenthetubeconcaveliquidleveldropstoascale"25mL",theliquidvolumeoutflowfromtheinst