人教版选修四第四章《电化学基础》测试题Word文件下载.docx
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人教版选修四第四章《电化学基础》测试题Word文件下载.docx
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InC.twobeaker,thepHofthesolutionincreases
TherateatwhichD.producesbubblesisslowerthanthatofB.
3.thereactionofgalvaniccellsinthefollowingchangesis
A.darkenedthesurfaceofsilvermedalsintheair
B.whengalvanizedironisscratchedonthesurface,itcanalsopreventironfrombeingoxidized
C.hotwireincontactwithcoldwater,blackprotectivelayerformedonthesurface
D.concentratednitricacidismorelikelytooxidizemetalcopperthandilutenitricacid
4.thethreeelectrolyticcellswhicharerespectivelymoltensodiumchloride,magnesiumchlorideandaluminaareconnectedinseries,andafteracertainperiodoftime,theratiooftheamountofsodium,magnesiumandaluminumisreleasedundercertainconditions
A.1:
2,,3,B.3:
2,1,C.6,2,3,1,D.6:
3
5.,aboutlead-acidbatteriesPb+PbO2+2H2SO4,PbSO4+2H2Oiscorrect,yes
InA.discharge,thepositivereactionisPb(s)+SO42-(AQ)=PbSO4(s)+2e-
B.inthedischargewhenthebatteryisinleadanodematerials
WhenC.charges,theconcentrationofsulfuricacidinthebatteryisgettingsmaller
WhenchargingD.,theanodicreactionisPbSO4(s)+2e-=,Pb(s)+SO42-(AQ)
The6.oneconsistsofX,Y,Zalloy,Wfourmetalcomponents,ifonlytheZalloyinhydrochloricacid,Ycanbedissolved;
ifthealloyinthehumidair,thesurfaceappearsonlyZcompounds;
ifthealloyasanode,Xsaltsolutionastheelectrolyte,electricityfourthemetalionsforminthesolution,butonlyprecipitatedonthecathodeX.Theorderofactivityofthefourmetalsis...
A.Y>
Z>
W>
X>
Y>
XB.Z
C.W>
WD.X
Two,doublechoice(5minuteseveryday,everydaytherearetwooptionstodowrong,0points,missed2points,atotalof20points.)
Inanelectrolytesolutionof7.pH=a,twoinertelectrodesareinsertedintotheelectrolyteforaperiodoftimeafterdirectcurrent,andthesolutionispH>
A,thentheelectrolytemaybe
A.NaOHB.Na2SO4C.AgNO3D.HCl
8.thefollowingdescriptiondoesnotconformtotheactualproduction
A.electrolyticmoltenaluminaisusedtomakealuminum,andironisusedasanode
RefiningcrudecopperbyB.electrolysisandusingcoarsecopperascathode
C.causticsodawaspreparedbyelectrolysisofsaturatedsaltwater,andnickelcoatedcarbonsteelmeshwasusedascathode
D.galvanizedonplatedparts,withzincasanode
9.,thechemicaltermisanimportanttoolinstudyingchemistry
A.electrolysissaturatedsaltwater,anodeelectrodereaction:
2Cl-2E=Cl2=
ThenegativereactionofB.typealkalinehydrogenfuelcell:
O2+2H2O+4e-=4OH
WhenC.platedcopper,anodereaction:
Cu2++,2e-,==Cu
ThenegativereactionofD.steelelectrochemicalcorrosion:
Fe2e==Fe2+
10.whentheelectrolytesolutionisanoxyhydrogenfuelcell,theelectrolytesolutionissaturatedwithsodiumcarbonatesolutionforaperiodoftime,assumingthatthetemperatureisconstantatthetimeofelectrolysisandtheinertelectrodeisused
A.whenthenegativeelectrodeofthebatteryconsumesmggas,theanodeoftheelectrolyticcellissimultaneouslygeneratedwithMggas
ThepositivereactionofB.batteryisO2+2H2O+4e-=4OH-
AfterC.electrolysis,C(Na2CO3)remainsunchanged,andcrystalprecipitationoccursinthesolution
InD.batteries,C(KOH)remainsconstant;
solutionpHbecomeslargerintheelectrolyticcell
Thesecondpartisthenonchoicequestion(50pointsaltogether)
Three,nonchoicequestions(50points)
1.(16point)Zn-MnO2drycellsarewidelyused,andtheirelectrolytesolutionsareZnCl2-NH4Clmixedsolutions.
(1)thenegativeelectrodematerialofthebatteryis.Whenthebatteryisworking,theelectronsflow(fillthepositiveornegative).
(2)iftheZnCl2-NH4ClmixedsolutioncontainingCu2+impurities,willacceleratecorrosionofaelectrode,themainreasonisthat
.InordertoremoveCu2+,itisbettertousethefollowingreagent(fillincode).
A.NaOH,b.Zn,c.Fe,d.NH3,H2O
(3)oneofthemethodsofMnO2productionistousegraphiteaselectrodeandelectrolyticacidificationofMnSO4solution.Theelectrodereactionofcathodeis.Iftheelectrolyticcircuitpassesthroughthe2molelectron,thetheoreticalyieldofMnO2isgram.
12.(10points)dipthecleanmetalsheetsFe,Zn,A,B,respectively,withCuwiresinsuitableelectrolytesolutions.Themovementdirectionofthevoltageindicatorandthereadingofthevoltmeterarerecordedandshownasshowninthefollowingtable:
Metal
Electronflowdirection
Voltage/V
Fe
FetoCu
+0.78
Zn
ZntoCu
+1.10
A
CutoA
0.15
B
BtoCu
+0.3
Accordingtotheaboveexperimentalrecords,completethefollowingblank:
(1)thegreaterthedifferenceinthemetalactivityofthetwoelectrodethatmakesupthechemicalcell,thegreaterthereadingofthevoltmeter(fillingin"
big"
or"
small"
).
Zn,A,B,threekindsofmetalactivityfromstrongtoweakorderis.
(2)theprimarycellcomposedofCuandAisnegativeelectrode
.
(3)AandBalloy,exposedinmoistair,firstcorroded.
13.(24points)forthedrugandtime,a,BandCthreestudentswithcopper,zinctablets,dilutesulfuricacidandCuSO4solution;
DCpowersupply,graphiteelectrodes,wires,tubesandotherchemicalbeakers,commondrugsandinstruments(supplies),withacleveridea,"
relay"
wayaseriesofexperimentaldesign,comparisonofcopperandzincmetalactivityrelativestrength.Fillintheblanksbelow:
(1)astudentplacedasmallpieceofcopperandzinconthebottomofthebeaker(copperandzincwerenotincontact),andcarefullyaddeddilutesulfuricacidtothebeaker.Aclassmate'
sdesignideais.
(2)theexperimentofclassmateB,followedbytheadditionofasolutiontothebeaker,.TheprinciplethatBstudentsmaketherelativestrengthofzincandcoppermetalactivityisbasedon
.
(3)CstudentsusedDCpowerandgraphiteelectrodestoassembletheelectrolyticdevice,andthenecessaryreagents(aselectrolyte)wereaddedtothesolutionaftertheexperiment.Thereactionstartedunderregulation,andthechemicalreactionequationintheexperimentwas.Theobviousexperimentalphenomenaobtainedare.
(4)pleasedesignanothersimpleexperiment(reagent,instrumentoptional)toinvestigateandconfirmtherelativestrengthofzincandcoppermetalactivity(briefdescriptionofoperationandphenomenon)
Takethe4andfourthchaptersonthebasicunitofelectrochemistry
Thefirstpartisthemultiple-choicequestion(90pointsaltogether)
Questionno.
One
Two
Three
Four
Five
Six
Seven
Eight
Nine
Ten
Answer
C
D
AD
AB
BC
Thesecondpartisthenonchoicequestion(60pointsaltogether)
11.
(1)Zn(orzinc)anode(4points)
(2)ZnreactswithCu2+toformCu,ZnandCutoformtheprimarycell,andthereactionrate(4points)isaccelerated(b)
(2)
(2H++2e-=H2=3)
(2)87g(4)
12.(10points)
(1)large(2points)
(2)Zn>
B>
A(2points)
(3)Cu
(2)Cu2+
(2)Cu2e=;
(4)B(2points)
13.(24points)
(1)thereisabubbleonthezincsheet,andthereisnobubbleonthecoppersheet.(2points)
Zincdisplaceshydrogenfromacid,butcopperdoesnot.(2points)
(2)CuSO4solution.(2points)
Thereisredcopperprecipitationonthezincfilm,andtherateofbubbleformationonthezincfilmisobviouslyaccelerated
(2).(2points)
Areactivemetalcandisplaceaninertmetalfromitssaltsolution,(2points)Zn,Cu,dilutesulfuricacid,agalvaniccell,andZnasanegativeelectrode.(3points)
(3)2CuSO4+2H2O+O2=2Cu+2H2SO4(3points)
Redcopperprecipitatesonthecathode.(2points)
(4)takeasmallpieceofcopperandzincslicesinthetesttube,andthenaddasmallamountofbluecoppersulfatesolutiontothetesttube.Afterawhile,theblueofthetesttubesolutionaddedwithzincdropstoalmostcolorlesssolution.(otherreasonableanswersareequallydivided)(4points)
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