1.Asuitableindicatorshouldbechosen,preferablyonethatwillexperienceachangeincolor(anendpoint)closetotheequivalencepointofthereaction.译文:应该选择合适的指示剂,最好是选择那种在反应终点会改变性质的物质。 |
|
|
2.IntheInternationalUnionofPureandAppliedChemistry(IUPAC)systemofchemicalnomenclature,thenameofanalkeneisderivedfromthenameofthecorrespondingalkanebyreplacingthe-anealkanesuffixwith-eneand,ifnecessary,addingaprefixtoindicatethelocationofthedoublebondinthemolecule.译文:在国际理论和应用化学联合会化学命名法系统中,烯烃的名称来源于相应的烷烃,用-ene取代烷烃的后缀-ane,如果必要的话,添加一个前缀表示分子中双键的位置。 |
|
|
3.Theequivalencepointofthereaction,thepointatwhichequivalentamountsofthereactantshavereacted,willhaveapHdependentontherelativestrengthsoftheacidandbaseused.译文:反应的等当点,即为反应物等量反应的那一点,其pH值依赖于使用的酸和碱的相对强度。 |
|
|
4.Eachofthesecompoundscontainsatleastoneringthatconsistsofsixcarbonatoms,eachjoinedtoatleasttwoothercarbonatoms,andeachjoinedtoadjacentcarbonatomsbyonesingleandonedoublebond.译文:这些化合物中的每一个至少包含一个六个碳原子组成的环,每个碳原子连接着至少两个其他的碳 |
|
|
5.Theelementsaresometimesgroupedaccordingtotheirproperties.译文:元素有时可根据他们的性质成组。 |
|
|
6.Mostpeoplebelievedthatnaturalprocesseswerecontrolledbyspirits,andtheyreliedonmagictopersuadethespiritstohelpwhiletheyconductedpracticaloperations.译文:现在,大多数人认为自然过程可由人脑控制,并且在他们做物理操作时魔力可帮助他们说服大脑。 |
|
|
7.Thisisbestachievedbywashingahangingdropfromthetipoftheburetteintotheflaskrightattheendofthetitrationtoachieveadropthatissmallerinvolumethanwhatcanusuallybeachievedbyjustdrippingsolutionofftheburette.译文:这一目标(指反应终点)可通过在滴定即将结束时,利用蒸馏水清洗悬挂于滴定管尖端的液滴并汇入烧瓶来实现,该液滴体积上要比通常从滴定管滴下的液滴小得多。 |
|
|
8.Inorganicchemistry,compoundscomposedofcarbonandhydrogenaredividedintotwoclasses:aromaticcompounds,whichcontainbenzeneringsorsimilarringsofatoms,andaliphaticcompounds,whichdonotcontainaromaticrings.译文:在有机化学中,由碳和氢组成的化合物可分为两大 |
|