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兴趣小组进行如下两个实验： （1）探究盐酸与氢氧化钠反应是否放热：取适量稀盐酸于烧杯中，测其温度后，加入适量的氢氧化钠固体充分反应后再测温度，发现温度明显升高．于是得出结论该反应放热．你认为该结论...
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实验小组探究盐酸和氢氧化钠反应过程中溶液pH的变化规律得到如图所示曲线下列有关该实验事实的说法正确的
该实验是将氢氧化钠溶液滴入盐酸中
B点表示盐酸和氢氧化钠恰好完全反应
A点时的溶液能使酚酞试液变红
C点时，溶液中的溶质只有氯化钠
某兴趣小组同学为了探究实验室中久置的氢氧化钠固体的成分进行了有关实验请你与他们一起完成以下探究活动【
化学兴趣小组的同学做中和反应实验时将稀盐酸滴入氢氧化钠溶液中看到有气泡产生是不是拿错了药品经检验确认
某化学兴趣小组同学为了探究实验室中的氢氧化钠固体是否变质进行了有关实验请你与他们一起完成以下探究活动
.某化学兴趣小组的同学在实验室配制溶质质量分数为8%的氢氧化钠溶液并用其测定某稀盐酸中溶质的质量分数
某兴趣小组在实验室发现一瓶敞口久置的氢氧化钠和一瓶未标浓度的稀盐酸为测定氢氧化钠的变质情况和稀盐酸的
实验小组探究盐酸和氢氧化钠反应过程中溶液pH的变化规律得到如下图所示曲线下列有关该实验事实的说法正确
该实验是将氢氧化钠溶液滴入盐酸中
B.点表示盐酸和氢氧化钠恰好完全反应
C.点时的溶液能使酚酞溶液变红
A.点时，溶液中的溶质只有氢氧化钠
某兴趣小组需要10%的氢氧化钠溶液和10%的硫酸溶液进行中和反应实验1若选择40g上述氢氧化钠溶液则
某兴趣小组为测定某品牌白醋含醋酸的质量分数进行了如下实验取10.0g白醋样品并向其中滴加溶质质量分数
兴趣小组在探究二氧化碳与氢氧化钠溶液反应的实验中做了如下图所示的实验1将足量的氢氧化钠浓溶液装入分液
实验小组探究盐酸和氢氧化钠反应过程中溶液pH的变化规律得到如下图所示曲线下列有关该实验事实的说法正确
该实验是将氢氧化钠溶液滴入盐酸中
B点表示盐酸和氢氧化钠恰好完全反应
C点时的溶液能使酚酞溶液变红
A点时，溶液中的溶质只有氢氧化钠
实验小组探究盐酸和氢氧化钠反应过程中溶液pH的变化规律得到如图所示曲线下列有关该实验事实的说法正确的
该实验是将氢氧化钠溶液滴入盐酸中
B点表示盐酸和氢氧化钠恰好完全反应
A点时的溶液能使石蕊试液变红
C点时，溶液中的溶质只有氯化钠
某兴趣小组为测定某品牌白醋含醋酸的质量分数进行了如下实验取10.0g白醋样品并向其中滴加溶质质量分数
食醋是家庭常用的调味品某兴趣小组同学为探究食醋中醋酸乙酸的质量分数设计并进行了如下实验取10%的氢氧
食醋是家庭常用的调味品某兴趣小组同学为探究食醋中醋酸乙酸的质量分数设计并进行了如下实验取10%的氢氧
某兴趣小组为测定某品牌白醋含醋酸的质量分数进行了如下实验取10.0g白醋样品并向其中滴加溶质质量分数
实验小组探究盐酸和氢氧化钠反应过程中溶液pH的变化规律得到如图所示曲线下列有关该实验事实的说法正确的
该实验是将氢氧化钠溶液滴入盐酸中
B.点表示盐酸和氢氧化钠恰好完全反应
A.点时的溶液能使酚酞试液变红
C点时，溶液中的溶质只有氯化钠
实验小组探究盐酸和氢氧化钠反应过程中溶液pH的变化规律得到如图所示曲线.下列有关该实验事实的说法正确
该实验是将氢氧化钠溶液滴入盐酸中
B.点表示盐酸和氢氧化钠恰好完全反应
A.点时的溶液能使石蕊试液变红
C.点时，溶液中的溶质只有氯化钠
下面是某化学兴趣小组同学学习氢氧化钠和稀盐酸反应时进行多角度探究的实录1探究实验中的能量变化.在盛有
某兴趣小组需要10%的氢氧化钠溶液和10%的硫酸溶液进行中和反应实验1若选择40g上述氢氧化钠溶液则
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8分Forcenturiesmedicalpioneershaverefinedavarietyofmethodsandmedicinestotreatsicknessinjuryanddisabilityenablingpeopletolivelongerandhealthierlives.Asalamanderasmalllizard﹣likeanimalcangrowbackitsleg.Whycan'tahumandothesameaskedPeruvian﹣bornsurgeonDr.AnthonyAtalainarecentinterview.Thequestionareferencetoworkaimingtogrownewlimbsforwoundedsoldierscapturestheinventivespiritofregenerativemedicine.Thisinnovativefieldseekstoprovidepatientswithreplacementbodyparts.Thesepartsarenotmadeofsteel;theyaretherealthings﹣﹣﹣livingcellstissueandevenorgans.Regenerativemedicineisstillmostlyexperimentalwithclinicalapplicationslimitedtoproceduressuchasgrowingsheetsofskinonburnsandwounds.Oneofitsmostsignificantadvancestookplacein1999whenaresearchgroupatNorthCarolina'sWakeForestInstituteforRegenerativeMedicineconductedasuccessfulorganreplacementwithalaboratory﹣grownbladder.SincethentheteamledbyDr.Atalahascontinuedtogenerateavarietyofothertissuesandorgans一fromkidneystoears.Thefieldofregenerativemedicinebuildsonworkconductedintheearlytwentiethcenturywiththefirstsuccessfultransplantsofdonatedhumansofttissueandbone.Howeverdonororgansarenotalwaysthebestoption.Firstofalltheyareinshortsupplyandmanypeoplediewhilewaitingforanavailableorgan;intheUnitedStatesalonemorethan100000peoplearewaitingfororgantransplants.Secondlyapatient'sbodymayultimatelyrejectthetransplanteddonororgan.Anadvantageofregenerativemedicineisthatthetissuesaregrownfromapatient'sowncellsandwillnotberejectedbythebody'simmunesystem.Todayseverallabsareworkingtocreatebioartificialbodyparts.ScientistsatColumbiaandYaleUniversitieshavegrownajawboneandalung.AttheUniversityofMinnesotaDorisTaylorhascreatedabeatingbioartificialratheart.Dr.Atala'smedicalteamhasreportedlong﹣termsuccesswithbioengineeredbladdersimplantedintoyoungpatientswithspinabifidaabirthdefectthatinvolvestheincompletedevelopmentofthespinalcord.AndattheUniversityofMichiganH.DavidHumeshascreatedanartificialkidney.Sofarthekidneyprocedurehasonlybeenusedsuccessfullywithsheepbutthereishopethatonedaysimilarkidneywillbeimplantableinahumanpatient.Thecontinuingresearchofscientistssuchasthesemayeventuallymakedonororgansunnecessaryandasaresultsignificantlyincreaseindividuals'chancesofsurvival.62.InthelatestfieldofregenerativemedicinewhatarereplacementpartsmadeofA.Donatedcellstissuesandorgans.B.Rejectedcellstissuesandorgans.C.Cellstissuesandorgansofone'sown.D.Cellstissuesandorgansmadeofsteel.63.WhathavescientistsexperimentedsuccessfullyonforabioartificialkidneyA.Patients.B.Rats.C.Sheep.D.Soldiers.64.WhyisgenerativemedicineconsideredinnovativeA.Itwillprovidepatientswithreplacementsofttissues.B.Itwillstrengthenthehumanbody'simmunesystem.C.Itwillshortenthetimepatientswaitingforadonatedorgan.D.Itwillmakepatientslivelongerwithbioartificialorgans.65.Whatisthewriter'sattitudetowardsregenerativemedicineA.Positive.B.NegativeC.DoubtfulD.Reserved.
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