首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
NaClO是漂白液的有效成分，某研究小组探究NaClO溶液的性质，设计了下列实验：下列判断不正确的是（ ）
查看本题答案
包含此试题的试卷
高三下学期化学《》真题及答案
点击查看
你可能感兴趣的试题
漂白液的主要成分是NaClONaClO中氯元素的化合价是
﹣1
0
+1
+5
下列说法符合事实的是
漂白精的有效成分是NaClO
碘化钾的水溶液遇淀粉现蓝色
硫在空气中燃烧生成SO2，在纯氧中生成SO3
漂白精露置空气中变质，既发生氧化反应又发生非氧化还原反应
某校高一化学研究性学习小组对日常生活中的氯气用途进行了调查了解到氯气可广泛地应用于衣物的漂白水体的杀
实验室模拟工业漂白液有效成分为NaClO脱除废水中氨氮NH3的流程如下下列分析正确的是
①中采用蒸馏的方法精制粗盐水
②中阳极的主要电极反应：4OH
-
- 4e
-
= 2H
2
O + O
2
↑
③中制备漂白液的反应：Cl
2
+ OH
-
= Cl
-
+ HClO
②、③、④中均发生了氧化还原反应
家用漂白剂的有效成分是次氯酸钠NaClO其制备反应的化学方程式是Cl2+2NaOH═NaCl+NaC
某工厂制取漂白液的化学原理为Cl2+2NaOH═NaCl+NaClO+H2O在该反应中氯元素没有呈现
+2
+1
0
﹣1
探究氯气的性质时将干燥的有色布条和湿润的有色布条分别放入两个集气瓶中同时通入氯气后可观察到的现象为该
工业上把Cl2通入冷NaOH溶液中制得漂白液主要成分NaClO一化学小组在室温下将氯气缓缓通入NaO
工业制取漂白液的化学反应方程式为Cl
2
＋2NaOH===NaCl＋NaClO＋H
2
O
a点时溶液中各离子浓度：c（Na
＋
）＞c（Cl
－
）＞c（ClO
3
－
）＝c（ClO
－
）＞c（OH
－
）＞c（H.
＋
）
t2～t4，ClO
－
离子的物质的量下降的原因可能是3ClO
－
= 2Cl
－
＋ClO
3
－
使用漂白液时，为了增强漂白效果，可以向漂白液中加入浓盐酸
漂白液的主要成分是NaClONaClO中氯元素的化合价是
﹣1
0
+1
+5
漂白液的主要成分是NaClONaClO中氯元素的化合价是
-1
0
+1
+5
漂白液的主要成分是NaClONaClO中氯元素的化合价是
-1
0
+1
+5
漂白液的主要成分是NaClONaClO中氯元素的化合价是
﹣1
0
+
1
+
5
漂白液的主要成分是NaClONaClO中氯元素的化合价是
﹣1
0
+1
+5
某工厂制取漂白液的化学原理为Cl2＋2NaOH===NaCl＋NaClO＋H2O在该反应中氯元素没有
＋2
＋1
0
－1
实验小组同学看到一则报道某造纸厂误将槽车中漂白液NaCl和NaClO的混合液倒入盛放饱和KAlSO4
漂白粉与漂白液可用于杀菌消毒下列说法中正确的是
漂白粉是纯净物，漂白液是混合物
漂白粉的有效成分是Ca(ClO)
2
工业上将氯气通入澄清石灰水制取漂白粉
漂白液的有效成分是Na
2
O
2
生活中常使用漂白液和漂白粉对环境和饮用水进行杀菌消毒以抑制大规模传染病爆发.回答下列问题1漂白粉的有
将100mL5mol·L-1NaOHaq稀释到500mL稀释后溶液中NaOH的物质的量浓度为____
在今年泰国洪灾中要用大量漂白粉和漂白液杀菌消毒下列说法中正确的是
漂白粉是纯净物，漂白液是混合物
漂白粉的有效成分是Ca(ClO)
2
工业上将氯气通入澄清石灰水制取漂白粉
漂白液的有效成分是Na
2
O
2
2010年1月12日海地当地时间16时53分北京时间1月13日5时53分海地遭遇500年来最强地震在
漂白粉是纯净物，漂白液是混合物
漂白粉的有效成分是Ca(ClO)
2
工业上将氯气通入澄清石灰水制取漂白粉
漂白液的有效成分是Na
2
O
2
热门试题
更多
如图所示关系图其中“——”表示相互反应“→”表示转化关系． 1右图中物质X是 2写出实现转化③的一个反应方程式 3转化⑤中Fe3O4发生反应选填“氧化”或“还原” 4图中实现①—⑤的反应中一定是化合反应的是
Itisreportedthatmanymiddleschoolstudentsarejustnotgettingenoughsleepespeciallyduringtheschoolweek.Theproblemseemstoget1badastheygetolder.Year7studentssleep8.4hoursinaschoolnightandYear9studentsonly6.9hours. It'salsoreportedthatnotgettingenoughsleepcancause2probleminastudent'slife.Manystudentsfall3sleepatschoolorwhiledoingtheirhomeworksoitisnot4surprisethattheygetlowergradesthanthosewhogetenoughsleep.Scientistssuggestninehoursanightformiddleschoolstudents.5thestudentswhofeelunhappyandnervous73%don'tgetenoughsleepatnight. Whyaren'tstudentsgettingenoughsleep?Manystudentshaveoneofthe6followthingsliketelephonetelevisionorcomputerintheirbedrooms. 7usethemonaschoolnightnotonlytakestheirtimeawayfromhomeworkbutalsomakes688difficultforthemtosleep.Asaresultmanystudentscan'tsleepbefore11pmyettheymustgetupearly9gotoschool. Scientistsalsosuggeststudentsshouldnotdoexcitingactivitiesforanhour10bedtime.
下列关于热机和环境保护的说法中正确的是
请运用“守恒”的思想回答下列问题． 古代“银针验毒”的原理是4Ag+2H2S+O22X+2H2O根据化学反应前后推出X的化学式为Ag2S．
按要求回答下列问题． 地壳中含量最多的元素符号是
Theywantpracticetheirhobbiesasmanyastheywant.
如图将线段AB绕点O顺时针旋转90°得到线段A'B'那么A﹣25的对应点A'的坐标是
下图是实验室制取气体时常用的仪器回答下列问题1仪器A的名称是2实验室制取二氧化碳的化学反应方程式是3①组装一套制取二氧化碳气体的装置时若选用了标号为AGHIJO的仪器还应选用所给仪器中的②用上述装置制取CO2检验集气瓶内已经收集满CO2气体的操作是4在实验室里用加热高锰酸钾来制取氧气时除合理选用题中所给仪器外还必须补充的一种玻璃仪器是5选择气体制取装置时要考虑反应物状态和气体的性质．
北方冬天常用水作为工作物质向千家万户供暖用水作为工作物质主要是利用水的
FourBenefitsofWritingbyHand TodayisNationalHandwritingDay!Althoughwedon'twritelikeweusedtoherearefourwayshandwritingisstillhelpful. It'sbetterforlearning. 1That'sbecauseputtinginktopaperstimulates刺激thebrain.Onestudyfrom2010foundthatthebrainareasrelatedtolearninglitupmuchmorewhenkidswereaskedtowritewordslikespaceshipbyhandversusjuststudyingthewordclosely. 2 Manyfamousauthorspreferwritingbyhandtotheuseofatypewriterorcomputer.WriterSusanSontagoncesaidthatshepennedherfirstdrafts草稿beforetypingthemupforeditinglater.Shesaid3A2009studyseemstosupportSontag'spreferenceforwritingbyhandElementaryschoolstudentswhowroteessayswithapennotonlywrotemorethantheirkeyboardtappingfriendsbuttheyalsowrotefasterandinmorecompletesentences. Itwillpreventyoufrombeingdistracted分心. Thecomputerinfrontofyouisreallyadistraction.4In2012scientistsevensuggestedthattakingfiveminutebreakstobrowseTumblrorBuzzFeedcouldmakeyouamoreproductiveworker.Howeverwhenit'stimetoworkonthatessayhaveonlyapenandpaperinfrontofyou. Itkeepsyourbrainsharpasyougetolder. 5AccordingtoTheWallStreetJournalsomephysicianssaythattheactofwritingisgoodexerciseforthosewhowanttokeeptheirmindssharpastheyage. A.Itmakesyouabetterwriter. B.Writingisgoodforyourbrain. C.OfcoursetheInternetisn'tallbad. D.Iliketheslownessofwritingbyhand. E.Trywritingbyhandatleast20minuteseachday. F.Manywritershaveapreferenceforwritingbyhand. G.Oneofthemosteffectivewaystostudyistorewriteyournotesbyhand.
计算×=
下列化学实验操作正确的是
Whydidhehaveanawithhiswifeyesterday?Hiswifewasverysad.
以AnOutstandingWoman﹣MadameCurie为题目并按下列表格的内容写一篇100词左右的英语短文介绍居里夫人. 注意1.可适当增加细节以使行文连贯 2.标题为AnOutstandingWoman﹣MadameCurie不计入总词数. 参考词汇诺贝尔物理化学奖theNobelPrizeforPhysicsChemistry镭元素radiumelement
—What'sthematter?—TheysaidIwasn'tallowedhere.Theydon’tallowinthewaitingroom.A.smoking;tosmoke B.smoke;smokeC.tosmoke;smoking D.smoking;smoking
Ifvolunteeringbeginsatanearlyageitcanbecomepartofachild'slife﹣somethingheorshemayjustexpectandwanttodo.Itcanteachthem Asenseofresponsibility.Byvolunteeringchildrenandteenslearnhowtobeontimeforajobdotheirbestandbeproudoftheresults.Andtheyalsolearnthatintheendweareresponsibleforthewellbeingofourwholecommunity. Theknowledgethatonepersoncanmakeadifference.Awonderfulmessageforachildisthatheorsheisimportantenoughtohaveaneffortonsomeoneorsomethingelse. Thebenefitofsacrifice奉献的好处.Bygivingupatoytoalessfortunatechildachildlearnsthatitisgoodtosacrificesometimes.Cuttingbackonplayingtimetohelpcleanupastreettellskidsthatthereareimportantthingsotherthanourselvesandourneeds. Tolerance容忍.Workingincommunityservicecanbringkidsandteensintouchwithpeopleofdifferentbackgroundsabilitiesagesandeducation.Theywilllikelyfindthateventhemostdiversepeoplecanbeunitedbycommonvalues. Jobskills.Communityservicecanhelpyoungpeopledecideontheirfuturecareers.Learningtoworkasateammembertakingonleadershiprolessettingprojectgoals﹣theseareallskillsthatcanbelearnedbyvolunteeringandwillserveachildwellinanyfuturecareer. Howtofillfreetimewisely.Ifachildisnotinterestedintraditionalafterschoolactivitiescommunityservicecanbeawonderfulchoice. 1Youhelpastudentwhocan'tgotoschoolbecauseofmoney.Thatisabout. A.asenseofresponsibility B.jobskills C.tolerance D.thebenefitofsacrifice 2Ifyouhavetogetonwithallkindsofclassmates﹣hardworkingorlazyworkaholicorplayfirstpoliteorrudeetc.whatyouneedmostis. A.tolerance B.theknowledgethatonepersoncanmakeadifference C.thebenefitofsacrifice D.asenseofresponsibility 3TheunderlinedworddiverseinPara.5probablymeans. A.interesting B.different C.personal D.selfish 4Whatwouldbethebesttitleforthispassage? A.WhattoDoasaVolunteer B.WhatYouCanLearnfromVolunteering C.HowtoBeaGoodVolunteer D.LearntoBeaVolunteer
下列实验现象的描述错误的是
按要求回答下列问题． 水分子可用符号表示为
父亲使我牢记努力工作的价值.impress…on
下列实验设计无法达到实验目的的是
I'msittinginmykitcheninLondontryingtofigureoutatextmessagefrommybrother.HelivesinourhomecountryofGermany.WespeakGermantoeachotheralanguagethat'srichinstrangewordsbutI'veneverheardthisonebeforefremdschämen. Theexperiencegetsmetoconsidercanweloseourmotherlanguage?Mostimmigrants移民knowwhatit'sliketobenotasgoodattheirmotherlanguageasbefore.Theprocessseemsobviousthelongeryouareawaythemoreyourlanguagesuffers.Butit'snotquitesostraightforward.Itturnsoutthathowlongyou'vebeenawaydoesn'talwaysmatter.Socializingwithothernativespeakersabroadcanworsenyourownnativeskills.Andemotionalfactorsliketrauma精神创伤canbethebiggestfactorofall. Inchildrenthephenomenonoflanguageattrition语言磨蚀issomewhateasiertoexplainsincetheirbrainsaregenerallymoreflexibleandadaptable.Untiltheageofabout12aperson'slanguageskillsarerelativelyeasytochange.Studiesoninternationaladoptershavefoundthatevennine﹣year﹣oldscanalmostcompletelyforgettheirfirstlanguagewhentheyareremovedfromtheircountryofbirth. Butinadultsthefirstlanguageisunlikelytodisappearentirelyexceptinextremecircumstances.ForexampleMonikaSchmidanalyzedtheGermanofelderlyGerman﹣Jewishwartimerefugees难民intheUKandtheUS.Themainfactorthatinfluencedtheirlanguageskillswasn'thowlongtheyhadbeenabroadorhowoldtheywerewhentheyleft.Itwashowmuchtraumatheyhadexperiencedasvictims.ThosewholeftGermanyintheearlydaysofNazioccupationbeforetheworstviolencetendedtospeakbetterGerman﹣despitehavingbeenabroadthelongest.ThosewholeftlatertendedtospeakGermanwithdifficultyornotatall. ItseemedveryclearlyaresultofthistraumasaysSchmid.EventhoughGermanwasthelanguageofchildhoodhomeandfamilyitwasalsothelanguageofpainfulmemories.Themosttraumatizedrefugeeshadheldthemback.AsoneofthemsaidIfeelthatGermanybetrayedme.AmericaismycountryandEnglishismylanguage. 1Whatdoesthefirstparagraphserveas? A.Acomment B.Abackground C.Anexplanation D.Anintroduction 2Whatdoparagraph4and5mainlytalkabout? A.Howtwolanguagescoexist B.Thewaytodealwithadult'strauma C.Thereasonsbehindadult'slanguageattrition. D.Whethertraumaleadstoadult'slanguageattrition. 3Whydoestraumacauseaperson'smotherlanguagetodisappear? A.Becausehecan'trememberhismotherlanguage. B.Becausehisabilitytocommunicateisaffected. C.Becausehiscountryisfarfromhim. D.Becausehechoosestoescapefrombadexperiences. 4Whatisthebesttitleforthepassage? A.Wheredoesyournativelanguagecomefrom? B.Willyouloseyournativelanguage? C.Howdoestraumaaffectyourfirstlanguage? D.Howfarareyoufromyourmothertongue
—Haveyougettoclasslate?—Notyet.
—Ihearyouhavetoexerciseearlyinthemorning.—Right.It'soneoftheinmyfamily.A.plans B.members C.rules D.suggestions
请回答下列与含碳物质有关的问题 CO和CO2都是碳的氧化物但由于它们的不同导致化学性质不同．要鉴别它们可分别向两瓶气体中滴加
如图抛物线y=ax2+bx+c与x轴交于AB两点与y轴交于C点且A10C03抛物线的对称轴为x=-11求抛物线的解析式2在该抛物线的对称轴上是否存在点M使得M到AC距离之和最小若存在求出点M的坐标若不存在请说明理由3该抛物线在第二象限的图象上是否存在一点P使四边形BOCP的面积最大若存在求出点P的坐标若不存在请说明理由4EF分别在抛物线和x轴上以EFBC为顶点的四边形为平行四边形．
Look！Thereissomething漂浮ontheriver
Youshouldmoveyourcaroritwillinthewayofthetraffic.
HomestayinSydneyAustralia 1Fourpersonswrotethesepassagessoasto. A.lookforsuitableroommates B.searchforhomestayinformation C.bookasuitableroominSydney D.advertiseroomsforhomestay 2OnepersonwholivesinJohn'sapartment. A.cansmokeintheapartment B.canuseJohn'swashingmachinetowashclothes C.hastowalkalongwaytogettothesportsfield D.isprovidedwithbreakfastandlunchonweekdays 3IfPeterwantstofindahomestayroomnearSydneyUniversityheshouldsendanemailto. A.markalarms@optusnet.com.au B.mineanny@hotmail.com C.cliqi9239@hotmail.com D.ainsleygilkes@yahoo.com.au
热门题库
更多
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
国际法
教案备课库
教案备课库
教案备课库
教案备课库
维修电工
教案备课库
湘公网安备 43130202000226号