号化学双语课件最终版.pptx

号化学双语课件最终版.pptx

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Ionicequation1515化学化学11班班杜其星杜其星20153641192015364119DefinitionUsingthesymbolsofionswhichactuallytakepartinthereactiontoindicatetheionicreactioniscalledionicequation.Howtowritetheionicequation?

WetakeCuSOsolutionreactionwithBaClsolutionasexampletoexplainthestepsofwritingtheionicequation.Step1.Writethechemicalequationofreaction.CuSO4+BaCl2=CuCl2+BaSO4Step2.Dismantlethedissolubleanddissociablesubstancesintoionicform.Buttheindissolubleandindissociablesubstancesandgasesarestillwritteninmolecularformula.Cu2+SO42-+Ba2+2Cl-=Cu2+2Cl-+BaSO4Step3.Deletetheionswhichnottakepartinthereactiononbothsidesoftheequation.Cu2+SO42-+Ba2+2Cl-=Cu2+2Cl-+BaSO4Step4.Checktheequation,bothsidesthenumberofatomsandchargesareequal,theionicequationiscorrect.SO42-+Ba2+=BaSO4Conditionsofionicreactionuindissolublesubstances（难溶物质）u（suchasBaSO4,AgCl）uindissociablesubstances（不可分解物质）u（suchasH2O）uvolatilizablesubstances（可挥发物质）u（suchasCO2）Exercise:

Whichofthefollowingreactionscannotbeindicatedbytheionicequation:

SO42-+Ba2+=BaSO4?

（）A.Ba（NO3）2+H2SO4=BaSO4+2HNO3B.BaCl2+Na2SO4=BaSO4+2NaClC.BaCO3+H2SO4=BaSO4+H2O+CO2D.BaCl2+H2SO4=BaSO4+2HClCThankyou!

Thankyou!