初三化學(xué)練習(xí)冊答案上海

初三化學(xué)練習(xí)冊答案（上海）ThefirstsemesterofninthgradechemistryChemistrymakestheworldabetterplace(a)makeadazzlingwhitepowderclarifythelimewaterturbidityitproducesalotofbubblesB.Magnesiumbeltcombustionproducesnewchemicalsthatarechemicalchanges,andphysicalchangesmayalsohaveaglowingg1owC,C,C,C,C,C,C,CEveryoneofthemhasagoodtimetherewasnochemicalchange.Becausethewaterintheseaisvaporized,itcausesthesalttobeprecipitatedout.therewasnochemicalchange.Becauseacandlemeltsandvaporizesdoesnotproduceanewsubstance.10.10.TheBC10.10.TheBCWhiteandwhitesolidwhitepowder,whitepowderwhiteoxidepowderB2.BatubeholderwillburnthetesttubeitisnotobviousthattheexperimentofboilingwaterinabeakeristoolongtheglueheaddroppertubeisinsertedintothetesttubetocontaminatethepipeBA.ItisdifficulttoclarifythecalciumcarbonateofcalciumcarbonateCalciumcarbonateproducesalargeamountofcarbondioxideandcarbondioxidesticksout9.BGarbageclassificationnameConcretegarbage(fillingsequencenumber)Organicwaste45910metalplasticharmfulrecycled17June1182,3,12.AlittleEnterthechemistrylab(a)ThesolutionturnsredandthesolutionisredandcolorlessBlueandblueprecipitationdisappearsReigniteoxygenwithaMarsbarBDTheformationanddissolutionofthegasgenerationprecipitationbythechangeofcolorTheexperimentalresultsofexperimentalexperimentsinexperimentalproductswereconcluded(2)tubebeakerwitharoundbottomflaskconea,b,d,b,dCABthealcoholonthewickisnoteasilylightedandwastedtheliquidwilloverflowalargeamountofheatwillexplodeatthebottomofthecylinderthecorkisonthetablewiththecorkonthetable(2)thelabelshouldbeheldinthepalmofthehand(1)thetesttubeshouldbetiltedwhenthetesttubeisnottiltedwhenheatedtheliquidinthetesttubeshouldbelessthanathirdofthetesttubeDAlittlePurificationofthesubstance?8CBCADC,C,C,C,C,C,C,C,d,C,C,d,C,CThedrainagecausestheliquidtoaccelerateanddissolveinasmallamountofliquidSlightly10.⑴thevolumereadinggeneratesanerrortheliquidwillflowoutofthegapbetweenthefilterpaperandthefunnelthesolidafterthedryingiseasytospill13.BDThe CaThe CaTheworld，smostcommonchemicallanguage(2)H(4)Na(5)Cu(6)AlCD2.TheelementnameheliumphosphoruspotassiumsymbolCNSiWithrecentACBDADThenameofthenitrogenCarbonmonoxidehydrogenChemicalformulaH20MgMgOstyleMaterialcategorycompoundelementalcompoundelementalcompoundelementalcompoundelementalcompoundcompoundelemental(1)thecalciumironthesulfur⑷PD(1)Mg02MgOstyle(2)C02H20sodiumchlorideNaOHCu(OH)2CuS04H20CaOH20ThischaptertestMetalelementsMetalelements5C,C,D,C,A6to10,B,D,C,A,BThenameofthenitrogensodiumbariumsymbols.WithrecentPMetalornon-metallicelementsNonmetallieelementsNonmetallieelementsMetalelementsNonmetallieelementsMetalelementsThenameoftheoxygenmagnesiaCarbondioxideChemicalformulaCOH20FeSinglematterorcompoundcompoundcompoundcompoundcompoundelementalcompoundAlittleThesecondisthelastcarbon+oxygenfuelscarbondioxideCC02+02litcarbondioxideandcarbonmonoxideTheC02+ChightemperatureCO16.⑴takeasmallamountofwaterandletthefilterpapersticktotheinnerwallofthefunnelandthefilterpapershouldbebelowtheedgeofthefunnel(2)preheatandheatupThereisnoverticaldropinthetesttube,whichwillcausetheliquidtodropoutofthetubebyonethirdofthevolumeofthetube,andtheliquidwilloverflowwhenheatedTakequalitysuchasdiamondandgraphiteafterfullyburninginoxygenareonlyaproductofcarbondioxide,andcarbondioxide(2)(2)(2)(2)areequal,thequalityofthediamondandgraphiteistheelementalcarbonAlittleThevastexpanseoftheatmosphereTheairthatpeopleliveon(a)10*1.76nf*5g二88gDABFCDEDon，tagree.Ifredphosphorusisnotdeficient,itcannotcompletelyconsumetheoxygeninresponse.Achemicalthatisstableinheliumgaskryptonisabletoemitadifferentcolorwhenitisenergizeditwillclarifythelime-waterexposureintheair,andafewdayslaterthelime-waterturbiditywillshowthatthereiscarbondioxideintheair(2)putadrinkinthefreezer,putupintheairinanhour,bottlesofoutsidewallwillhavesmallwaterdroplets,thatiswatervaporcondensationintheair7.ADE(2)(2)1?3CBB0SiFeAlNacalciumhydrogenpotassiummagnesiumcopperCobalt5.02makesuptwooxygenatoms03makesupthreeoxygens03,16*3=4824+16=40MgOstyleN2,14*2=28CaC0340+12+16*3=1002magicoxygen(a)YouneedoxygenYouneedtogetridofoxygenHelpbreathingPutoutthefireFuelcombustionRustpreventionThestripsofwoodwillbeignitedintonitrogenandoxygen,thewoodintheoxygenwillburnmore,andthewoodinnitrogenwillgoout3.4.5.A.5.A.6.ThereactionofmatterinpureoxygenismoreintensethaninairTheexperimentalstepsThephenomenonofconclusionPutthelightedsticksinthreegasesOnebottleofwoodwentoutslowlyandoneofthewoodenbarswentoutTheslowquenchingoftheairisthattheoxygenisextinguishedbynitrogen1.A.B2.DNameofthematerialChemicalformulaKC1O3Mn0202H202KC1MaterialcategorycompoundoxideelementaloxideoxidecompoundTypetheamount122.58732341874.5Alittle⑴hydrogenperoxideundercertainconditionsofoxygengeneratedinthereaction(2)theheatingcanincreasethereactionrateofhydrogenperoxidetoproduceoxygen(3)manganesedioxidecanspeedupthereactionofhydrogenperoxideTheconservationofmassinchemicalchanges(a)hydrogenandoxygenthereare2hydrogensand1oxygen2:1⑷"⑸18(6)88.9%2. (1)NH4HC03)17.7%)20.1percentismorethanfakeadvertisingS02CuONa20NaClMg(Oil)2CuS04(1)theMgOstyle⑵NetheA1C13(1)02⑵CutheCuOH206.6.02*10"236.02*10"3*6.02*10"52324Molecularweightg/Moorish28grams/Moore56g1.204*10242:6:1guidance:161844*6.02*10"23(1)4*6.02*10"23=2.408*10"242223(2)0.05*6.02*10"=3.01*1022⑴0.2*98=19.6g(2)5*27=135g6. (1)88/44=2mol4/40=0.1mol16/80=0.2moles(32+32)=12.8grainsBA.Slightly10.0.960.031.806*10"22Carbon,hydrogenandoxygenBthemassconservationofthematerialbeforeandafterthereactionthenumberofatomsbeforeandafterthereactionisthesameastwomagnesiumatomsandtwoatomsofoxygenandforevery2molesofmagnesium,youneed1moleofoxygen,youproduce2molesofmagnesiumoxideand1,2,1,21232122C0+02igniting2C02C+H20hotCO+H2Cu2(OH)2C03heatsup2CuO+H20+C02Let'ssayweneedoxygenXmolestoproduceMgOYmoles2Mg+02toignite2MgO2/2=1/XX=1mol,1/1=2/YY=2mol,Answer:need021mole,produceMgO2molThischaptertest1to6timesthesquarerootofthesquarerootofthat15ABABDCADDBothhydrogenandoxygenatomsconsistoftwohydrogenatomsandoneoxygenatom,andhydrogenperoxidehastwooxygenatomsandtwohydrogenatoms316217.1:2:1601.204*10"24BluevioletS+02ignitedS020.050.05Liquid-195.8neon,heliumtest-tubealcohollampironstand2KMnO4heatingK2MnO4+Mn02+02thegasthatCbeginstodischargecannotbecollected,etc.,whichproducesalargenumberofcontinuousbubblestobecollected,andwhenthereisalotofbubblesinthegascylinder,stopcollecting2KC103heating(Mn02)302up+2KC1highqualitysuchaspotassiumchlorateandmanganeseoxideweretaken,nolongerreducesfullyheatedtosolid,andweighingthequalityoftheremainingsolid,comparedwiththereactionbeforequality,thedifferenceisthedifferenceofoxygenTakefourcylinders,respectivelyin1/2volumeofwater,two-thirdsofthevolumeofwater,4/5ofthevolumeofwater,collectthereoccupydrainagemethod,therequiredgasvolumecanbesubjectStep3intothesolutionworld3.1thewater(a)?4BBDCVolatilization,precipitation,filtration,adsorptionalumchlorinegas6?9AABDH202212:1Heatcapacity—thetemperaturedifferencebetweentemperatureandtemperatureAnomalousexpansion-icefloatsonthesurfaceofthewaterAssociativedispersionCaO + H20 - Ca (OH) 2.Colorless,tasteless,thedensityofliquid,1*103kg/cm3,freezingpoint0°Cice,steamandpoorconductoris100°C?8CDDCDBCalciumoxidegraduallydisappearedfromphenolphthaleinandcalciumhydroxideasanalkalinesolution5.1ml(1)6mol,(2)100.8g3.2solution)?5CCBDBBDAddsodiumnitratetocooltheevaporationwaterTaketwobeakersrespectivelyeach100gto100gcoolwater80°Chotwater,addsolidammoniumchloriderespectively,untilsaturatedammoniumchloridedissolvedgrams1 7DDBDDBC

8. (1)10C8. (1)10C?20(2)18.5,185.5D二ADBADBCThepressure?4BBCB9.8meter,driptube,beaker,glassrod3,76oxygen560,11.27. 3940g31.61g/100gramsofwater26.5%(1)15g2)20%Theacidalkalinityof3.3solutionAlkaliacidThePHtestpaperpurplelitmusreagentcolorlessphenolphthalein?10BDADA,B,CDCalciumoxidereleasesalargeamountofhot,colorlessphenolphthphthalein,whichisalkalineappleredthesampredflowers,roses,daisiesthegreenThepotassiumcarbonateisalkalinebbecausethePHpaperisdirectlydippedinthesolutionandthepurplelitmusiscontaminatedThischaptertestI?5DABBA6?10ABACBII15CACAAA,(1)AthetlC<<AsolutionThesolutesolventHydrochloricacidwateriodinealcoholalcoholwaterSodiumhydroxidewaterCalciumhydroxidewatercarbonatewaterCooling,soluteandevaporativesolubilityofcalciumhydroxidedecreaseswiththeincreaseoftemperatureAmanisamanofhisownCaO+H20-Ca(OH)2Thetemperatureofsummerishigh,thewaterevaporatesmore,thesaltsolutionofsodiumchlorideischangedlessathightemperature,thesaltofprecipitationismoreInthewinter,thetemperatureislow,thewaterevaporatesless,thepurealkaliisinthelowtemperaturethesolubilitychangesbig,thepurealkalithatprecipitatesoutSummerishigh,lowpressure,TheoxygendissolvesandthefishsurfaceasaresultofinsufficientoxygenAlittle(1)CH40(2)12.5FuelanditscombustionBurningandextinguishing?4CBADExposuretoairisgreatisolatingfuelfromoxygenthetemperaturedropsbelowthef1ammab1epointTheheatcapacityislargeenoughtocooldown.WatervaporinsulatesfuelfromoxygenThedensityisgreaterthantheair,whichinsulatesthefuelfromtheoxygen,anddoesnotburnCoalandoilgasCoketarincokeovenPreventfirefromcomingdownandignitethealcoholinthelampholderPasstheoxygenintothewater4.2carbon1?5ACDCC6?10DBBBCBmaterialThenatureoftheuseItisnotveryhotandnotconductiveAsashieldinggasAtroomtemperature,thechemicalpropertiesareverylivelyHelpburnhydrogenTheignitiondensityislessthantheairTheballoonC+02lightC02removeairfromthedevicetopreventexplosionthecopperthatpreventstheformationoftheformationisreoxidizedthecarbondioxidemustbeignited2C0+02igniting2C02Clarifytheleveloffluidinthelime-waterinthetesttubeTheCaC03hightemperatureCaO+C02Ca(OH)2CuCuOC02CaC032cu+02heats2CuOCuO+COheatsthe