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室温下，用相同物质的量浓度的HCl溶液，分别滴定物质的量浓度均为0.1mol•L﹣1的三种碱溶液，滴定曲线如图所示，下列判断正确的是（ ）
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高三下学期化学《》真题及答案
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下列操作会导致实验结果偏高的是
中和热测定实验中，用铜制搅拌器进行搅拌，所测中和热的数值
配制一定物质的量浓度的溶液时，用量筒量取浓溶液的体积时仰视读数，所配溶液的浓度
中和滴定测定盐酸溶液浓度，量取20.00mL待测盐酸溶液的滴定管未用待测盐酸溶液润洗
用托盘天平称量10.5g某物质，砝码和药品的位置放反，所称药品的质量
下图为10mL一定物质的量浓度的HCl溶液用一定物质的量浓度的NaOH溶液滴定的图示请根据图示计算1
滴定度为THCl/NaOH=0.004420g/mLHCl溶液相当于HCl物质的量浓度是多少
现有①CH3COOH②HCl两种溶液选择填空A.①＞②B.①＜②C.①﹦②1当它们pH相同时其物质的
测定某碱液的浓度取该碱液5mL稀释到100mL再从中取出25mL用0.05mol/L的HCl溶液进行
计算题30.00mLHCl溶液用CNaOH=0.1072mol/L的NaOH标准溶液滴定至终点用去3
右图为20mL未知浓度的盐酸用一标准浓度NaOH溶液滴定时的滴定曲线则两种溶液的物质的量浓度分别是[
30.00mLHCL溶液用CNaOH=0.1072mol/L的NaOH标准溶液滴定至终点用去31.4
已知NH3和HCl都能用来做喷泉实验若在同温同压下用两个相同容积的烧瓶各收集满NH3和HCl气体用如
溶质的物质的量浓度相同，溶质的质量分数不同
溶质的质量分数相同，溶质的物质的量浓度不同
溶质的物质的量浓度和溶质的质量分数都不同
溶质的物质的量浓度和溶质的质量分数都相同
室温下有①Na2CO3溶液②CH3COONa溶液③NaOH溶液各25mL下列说法正确的是
物质的量浓度均为0.1mol/L，3种溶液pH的大小顺序是③>②>①
物质的量浓度均为0.1 mol/L，将3种溶液稀释相同倍数，pH变化最大的是②
物质的量浓度均为0.1mol/L，分别加入25mL 0.1mol/L盐酸后，pH最大的是①
pH均为9时，3种溶液的物质的量浓度的大小顺序是③>①>②
已知NH3和HCl都能用来作喷泉实验的气体若在同温同压下用等体积烧瓶各收集满NH3和HCl气体实验后
溶质的物质的量浓度相同、溶质的质量分数不同
溶质的质量分数相同，溶质的物质的量浓度不同
溶质的物质的量浓度和溶质的质量分数都不同
溶质的物质的量浓度和溶质的质量分数都相同
体积相同物质的量浓度相同的HCl溶液和CH3COOH溶液与NaOH溶液中和时两者消耗NaOH的物质的
相同
HCl多
CH
3
COOH多
无法比较
下图为10mL一定物质的量浓度的HCl溶液用一定物质的量浓度的NaOH溶液滴定的图示请根据图示计算1
1:5HCl溶液相当于物质的量浓度CHCl为4mol/l浓HCl的ρ=1.19g/ml ω=37%
下列操作会导致实验结果偏高的是
中和热测定实验中，用铜制环形搅拌器代替环形玻璃搅拌棒，所测中和热的数值
用标准NaOH溶液滴定未知盐酸溶液浓度，量取20.00mL待测盐酸溶液的滴定管未用待测盐酸溶液润洗
用托盘天平称量10.5g某物质，砝码和药品的位置放反，所称药品的质量
配制一定物质的量浓度稀硫酸溶液时，用量筒量取浓溶液的体积时仰视读数，所配溶液的浓度
右图为20mL未知浓度的盐酸用一标准浓度NaOH溶液滴定时的滴定曲线则两种溶液的物质的量浓度分别是c
对下列事实的解释正确的是
氯气可以使湿润的有色布条褪色,是因为氯气具有漂白性
分别用盛满HCl气体和盛满NO
2
气体的烧瓶做喷泉实验，喷泉结束后，所得溶液的物质 的量浓度相同
向50 mL 18 mol·L
-1
的H
2
SO
4
溶液中加入足量的铜片加热充分反应后,被还原的H
2
SO
4
的物质的量等于0.45 mol
常温下,浓硝酸可以用铝制容器贮存,说明铝与浓硝酸不反应
体积相同物质的量浓度相同的HCl溶液和CH3COOH溶液与NaOH溶液中和两者消耗NaOH的物质的量
CH
3
COOH多
HCl多
无法比较
相同
.已知NH3和HCl都能用来做喷泉实验若在标准状况下用两个大小相同的烧瓶分别收集满NH3和HCl气体
溶质的物质的量浓度和溶质的质量分数都相同
溶质的质量分数相同，溶质的物质的量浓度不同
溶质的物质的量浓度和溶质的质量分数都不同
溶质的物质的量浓度相同，溶质的质量分数不同
将标准状况下22.4LHCl气体溶于水配成250mL溶液此溶液中HCl的物质的量浓度为_______
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ItwasMother'sDayandIwasshoppingatthelocalsupermarketwithmyfiveyearoldsonTenyson.Aswewere1werealizedthatonlyminutesearlieran2womanhadfallenoverattheentranceandhitherheadontheground.3waswithherbuttherewasbloodeverywhereandthewomanwasembarrassedandclearlyinshock.4alotofpeoplestoppedtohelpout.5wewerewalkingtowardsthesceneTenysonbecamevery6aboutwhathadhappenedtotheelderlycouple.He7tomeMumit'snotmuchfunfallingoverinfrontof8.Seeingthattherewasaflowerstall摊位atthefrontofthesupermarketheaddedWhyshouldn'twe9theladyaflower?Itwillmakeherfeelbetter.Iwas10thathe'dcomeupwiththis11idea.Sowewentoverandtoldtheflowerseller12wewanted.Justtakeitshereplied.I13takeyourmoneyforsuchawonderful14.? Bynowmedicalstaffhadarrivedandwere15theinjuredwoman.Wegavetheflowertothewoman'shusbandandItoldhimitwas16myson.AtthattheoldmanstartedcryingandsaidThankyouverymuch.HethenturnedtomeYouhavea17son.HappyMother'sDaytoyou.? Themanbentdownandgavehiswifetheflowertellingherwhoitwasfrom.18beingbadlyhurttheoldladylookedupatTenysonwith19inhereyesandgavehimalittle20. 1A.leaving B.driving C.moving D.stopping 2A.injured B.awkward C.honest D.elderly 3A.Herhusband B.Myson C.Thecrowd D.Theseller 4A.Specifically B.Particularly C.Interestingly D.Fortunately 5A.If B.Since C.While D.Unless 6A.guilty B.curious C.angry D.worried 7A.complained B.said C.lied D.responded 8A.noone B.someone C.everyone D.anyone 9A.lend B.bring C.leave D.buy 10A.amazed B.shocked C.puzzled D.concerned 11A.wise B.sweet C.innocent D.crazy 12A.which B.when C.what D.whether 13A.mustnot B.can't C.maynot D.needn't 14A.scene B.habit C.flower D.deed 15A.checkingwith B.lookingafter C.operatingon D.payingfor 16A.from B.to C.with D.about 17A.respectful B.cheerful C.successful D.wonderful 18A.Outof B.Regardlessof C.Thanksto D.Asto 19A.love B.hope C.pity D.pain 20A.idea B.money C.smile D.comfort
一个数最大的约数是27这个数是一个数最小的倍数是24这个数是它们最大的公约数是最小公倍数是．
下面英文字母中是对称图形．
互质的两个数它的公因数
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怎样简便就怎样计算．
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