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1、Lesson2THECLASSIFICATIONOFINORGANICCOMPOUNDS无机化合物分类chemist化学家equation方程式become适合，与……相称aqueous水的radical基，根，原子团balance天平，平衡acidic酸的，酸性的substance物质anhydride酐sour酸的，酸味的；变酸basicanhydride碱酐taste味道，气味，味觉negative负的，阴的lemon柠檬acidradical酸根orange柑，桔；橙色share共享，分享citric柠檬的transf
2、er转移citricacid柠檬酸coordinate配位citrus柑桔属coordinatevalence配键lactic乳的hydroniumion水合氢离子lacticacid乳酸词汇litmus石蕊soapy肥皂般的，滑腻的litmuspaper石蕊试纸slippery滑的dye染料neutralization中和soak浸泡，浸渍evaporation蒸发enable使……能够positive正的，阳的indicator指示剂positiveion正离子methyl甲基negativeion负离子methylora
3、nge甲基橙lattice格子，点阵phenolphthalein酚酞crystallattice晶格react(with,on)反应electrovalent电价的strongacid强酸orient定向，取向ionize离子化，电离pattern模型，形式bitter苦味TheClassesofCompounds1.Thousandsandtensofthousandsofcompoundsareknowntothechemisttoday.Itwouldbeimpossibletolearnpropertiesandbe
4、haviorofevenafractionofthisnumberifithadtobedoneonthebasisofindividualcompounds.Fortunately,mostchemicalcompoundscanbegroupedtogetherinafewclasses.Then,ifwecanproperlyclassifyacompound,weareatonceawareofthegeneralpropertiesofthecompoundfromknowledgeofthepropertiesof
5、thatclassorgroupofcompounds.Forexample,HClisclassedasanacid,andbybecomingfamiliarwiththebehaviorofacidsasadistinctclass,weareatonceawareofthegeneralpropertiesofthecompound.Agreatmanyofthecompoundswearetostudymaybeclassifiedasacids,bases,salts,metallicoxides,ornonmet
6、allicoxides.Ofthesefiveclassesofcompounds,thefirstthree-acids,bases,andsalts-arebyfarthemostimportant.TheClassesofCompoundsThousandsandtensofthousandsofcompoundsareknowntothechemisttoday.化合物分类现今，化学家知道了成千上万的化合物。thousandsandtensofthousands成千上万beknownto被……所知chem(o)化学（的
7、）chemistry化学chemical化学的，化学药品chemosynthesis化学合成Itwouldbeimpossibletolearnpropertiesandbehaviorofevenafractionofthisnumberifithadtobedoneonthebasisofindividualcompounds.如果根据个别化合物来了解这么多化合物的性质，即使其中的一小部分也是不可能的。afractionof一小部分onthebasisof根据……,在……基础上Fortunately,mostchemica
8、lcompoundscanbegroupedtogetherinafewclasses.幸运的是，大多数化合物能够组合在一起分成几类。Then,ifwecanproperlyclassifyacompound,weareatonceawareofthegeneralprope
