Preparationofethylacetate
First,thepurposeofthee_periment:
1、Learnfromthegeneralprinciplesoforganicsynthetic
estersandmethods
2、Masterdistillation,e_traction,dryingandother
e_perimentaltechniquesanditsapplicationina
specifice_periment
Second,thee_perimentalprinciple:
Mainreaction：
CH3COOH+CH3CH2OH=CH3COOCH2CH3+H2O
Conditions:heatingto120to125Cinconcentrated
sulfuricacidcatalyzed
Sideeffects：浓H2SO4
CH3CH2OH--------->CH2=CH2+H2O
170度
浓H2SO4
CH3CH2OH--------->CH3CH2OCH2CH3+H2O
140度
Third,theinstrumentsandreagents:
1、Instrumentsandmaterials:Round-bottomedflask,
Sphericalcondenser,Straightcondenser，Distillationhead,aseparatoryfunnel,measuringbeakers,dropper,conicalflask,thermometer,electric
2、drugs:Glacialaceticacid(AR),absoluteethanol(AR),
concentratedsulfuricacid,saturatedbrine,asaturatedsodiumcarbonatesolution,asaturatedcalciumchloridesolution,driedoveranhydrousmagnesiumsulfate,litmus
Fourth,Reactor：
Fifth,E_perimentalprocedure:
Adding50mlroundbottomflask3ml5mlethanolandaceticacid,inshakingbatchofconcentratedsulfuricacidwasadded
1.3mlmi_ed,andaddafewgrainsofzeolite,andtheninstalltheinstrumentresponse
Lowheat,XXX,reflu_devicetothedistillationapparatus,XXX
Thedistillatewasslowlysaturatedsodiumcarbonatesolutionwasaddedportionwise,XXX,andseparatedaqueouslayerwaswashedoncewithsaturatedaqueoussalinesolution3mlTheorganiclayerwaswashedwithasaturatedsolutionofcalciumchloride3ml,XXX.Thecrudeethylacetate,driedonawaterbathheatedtodistill,XXX,andcalculatetheyieldpointorrefractiveinde_measurementproducts
Si_,Discuss:
1、Abletouseinplaceofaconcentratedsodiumhydro_idesolution
waswashedwithasaturatedsolutionofsodiumcarbonatedistillate
XXX,theproductcausesthehydrolysisofethylacetate,therebyreducingtheyieldof