高二学生下学期化学学习计划模板范文Sophomore students chemistry study plan next term modelWord格式.docx

高二学生下学期化学学习计划模板范文Sophomore students chemistry study plan next term modelWord格式.docx

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washtheeggshell,burning,grindingtaking.Thetreatmentissaidtoworkwell.Pleaseusetheknowledgeyouhavelearnedtoanalyzethetruth._________________________________________________________________

（4）sodiumhydroxidecanneutralizegastricacid.Whynotusesodiumhydroxidetotreatgastricacidexcess?

_______________________________________________________________.

Themaincomponentanalysisofacidishydrochloricacid,NaHCO3,Al（OH）3,eggshell（mostlyCaCO3）canreactwithHCltoreducetheeffectofgastricacid,whileNaOHcanneutralizestomachacid,butbecauseithasastrongcorrosive,willdamagethedigestivetract,soitcannotbeusedtoNaOHtreatmentofhyperhydrochloria.

Answer

（1）HCOH===CO2hav'

eH2O

（2）Al（OH）33H===Al33H2O

（3）CaCO3containingeggshell,washtoremovingdebris,burningismainlysterilization,disinfection,aftertakingtheCaCO3reactionwithacidtoreducegastricacidconcentration,CaCO32H===Ca2CO2=H2O

（4）NaOHisverycorrosiveandcanseriouslydamagethedigestivetract

10.thereisabottleofclearsolution,whichmaycontainNH,K+,Mg2+,Al3+,andBa2,SO,CO,NO,Cl-,I,thesolutionforthefollowingexperiments:

TheacidityofthesolutionwasmeasuredbypHtestpaper;

Takethepartofthesolution,addafewdropsofwaterandasmallamountofnewCCl4,theoscillation,static,CCl4layerispurplered;

Thirdly,somesolutionswereaddedintothediluteNaOHsolution,andthesolutiongraduallychangedfromacidictoalkaline,andnoprecipitationoccurredduringthewholeprocess;

Takesomeoftheabovealkalinesolution,addingNa2CO3solution,whiteprecipitateisgenerated;

Thealkalinesolutionbytheheating,gasrelease,redlitmuspapercanmakethegaswetblue.

Answerthequestionsaccordingtotheaboveexperimentalfacts:

（1）writetheionreactionequation________________________________________.

（2）ionspresentinthesolutioniscertainly_____________________________________________.

（3）thesolutionmustnotexistis__________________________________________ion.

（4）thesolutioncannotdeterminewhetherthereis___________________________________ion.

Theanalysisfirstconsidersthecoexistenceofionsgiveninthesubject.Ba2andSO,andI,COandFe3+,Mg2+,Al3+,H+Ba2,notalotofcoexistinsolution.BystepIknowthatthereisalargeamountofH+inthesolution,sothatthepresenceofCOcanbeexcluded.Bythestepsofknowledge,CCl4layerwithiodine,thesolutioncontainingI.Accordingtotheideaofioncoexistence

WanttojudgenoFe3+insolutionundertheacidicconditionswithoutNO.BythestepoutthepresenceofMg2+,al3.Bythestepsofknowledge,theprecipitationisBaCO3,inasolutioncontainingBa2whichcanexcludethepresenceofSO.Thegasproducedbytheprocessisammonia,sothesolutioncontainsNH.

Answer

（1）Cl22I===I22Cl

（2）NH,Ba2,I

（3）,SO,Mg2+,Al3+,CO,NO

（4）K+andCl

11.acompoundconsistingofshortcycleelements,X,isaneffectivecomponentofanantacid,andaclassmatewouldliketoexplorethecompositionofXandrefertothedata:

Theeffectiveingredientsoftheantacidconsistingofshortcycleelementsmaybesodiumbicarbonate,magnesiumcarbonate,aluminiumhydroxide,magnesiumaluminumsilicate,aluminiumphosphate,magnesiumcarbonateandmagnesiumcarbonate.

TheAl3inpH=5completeprecipitation;

Mg2+beginsprecipitationatpH=8.8andprecipitatescompletelyatpH=11.4.

Experimentprocess:

IaddexcesshydrochloricacidintothepowderofthecompoundXtoproducegasAandobtainacolorlesssolution.

II.DiptheplatinumwireinthesolutionofasmallamountofIandburnitontheflamewithoutayellowflame.

AddwatertothesolutionobtainedinI,adjustpHto5~6,producewhiteprecipitate,B,filter.

IV.addexcessNaOHsolutiontoprecipitateBandprecipitatealldissolved.

V.addingNaOHsolutiontothefiltrateobtainedinIII,adjustingpHto12andobtainingwhiteprecipitateC.

（1）ofAgascanmakeclearlimewaterturbid,chemicalformulaAis___________________.

（2）byIandIIXmustnotcontainelementsofjudgmentisp,________（fillelementname）.

（3）toformanionis__________________________________IIIinBequation.

（4）BdissolvedinionicequationIVis________________________________.

（5）thechemicalprecipitationofCis______________________.

（6）ifthen（A）:

n（B）:

n（C）=1:

1:

3,thechemicalformulaofXis___