英文版化学实验报告[本站推荐].docx

英文版化学实验报告[本站推荐]

第一篇：英文版化学实验报告[本站推荐]PreparationofEthylAcetateI.ExperimentalObjective1.Tograsptheesterificationreactionprincipleandmethodsofpreparationofethylacetatefromaceticacidandethanol.2.Tolearntoreflowmethodonthereaction.3.Toreviewtheuseofdistillation,separatingfunnel,basicoperations,suchaswashinganddryingoftheliquid.II.PrincipleoftheTestThisexperimentregardedglacialaceticacidandethanolasrawmaterial,itadoptedtheethanoloverdoseandthesuctioneffectofconcentratedsulfuricacidtomakethereactiongoessmoothly.Inadditiontogeneratingthemainreactionofethylacetate,thereisgeneratedasidereactionofdiethylether.Primaryreactions:CHCHCHCOOH323+浓HSO24HOCHCOOCHCH2323+Sidereactions:CHCH32浓HSO170CoHHC22O+H22(CHCH)322浓HSO140oC(CHCH)O322HO2+III.ApparatusandReagentsApparatus:100mlround-bottomedflasks,condensertubes,thermometers,funnels,electricsets,still,adaptor,metalstand,rubbertubesbeakers.Reagents:ethanol，aceticacid，sulfuricacidmagnesium，sodiumcarbonate，salt，calciumchloride，concentratedsulfuricacidIV.Experimentprocedure1,Put3mL(0.052mol)aceticacidand5mL(0.086mol)ethanolintoa100mLflask,then1.3mLofconcentratedsulfuricacidwasplacedintoitwithshaking,placedtheflaskintoamagneticstirredandheatedtorefluxfor1hour.Finally,cooledittoroomtemperature.2,Addwater,stirringuntilthesolidsfullydissolved,thentransferredittoaseparatoryfunnel,shakingandpointingtothewater-course.3,Theorganiclayerwaswashedwithsaturatedbrine,asaturatedsodiumcarbonatesolution,3mLeachsufficientlywashedwithwater,followedbywashingwithasaturatedsolutionofcalciumchloride3mL,anhydrouscalciumsulfate20min.4,Filtereditinto50mLflask,adistillationapparatusandheateddistillation,collectingthefraction73-78℃.Weighedtocalculatetheyieldofthemeasuredrefractiveindexproduct.V.DataProcessingFinalamountofethylacetatewas1.8g.(Aceticacidrelativemolecularmass60.05Density1.049)(relativemolecularmassof88.12acetaterelativedensity0.905)Yield=1.8/(0.052x88.12)X100%=39.1%VI.Attention1.Whenaddingconcentratedsulfuricacidexothermic,shouldbeaddedslowlywithshak