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1、高中化学复习谈（高中化学复习谈（High school chemistry reviewHigh school chemistry review）The TXT bee is busy all day and is praised.The mosquitoes keepon running,and people call.It doesnt matter how busy you are,why its important to be busy.Chemistry review of collegeentrance examination(collection of online articl
2、es)1.The chemical review of college entrance examination shouldgrasp the basic knowledgeThe chemical review of college entrance examination should bebased on teaching materials,especially basic knowledge.Butnot only the textbook knowledge simply repeat,and should havethree years or even a junior hig
3、h school chemistry knowledgerestructuring,integration,and produce new knowledge on theoriginal knowledge,so as to accomplish achieve mastery througha comprehensive study of organic chemistry and inorganicchemistry.Many examinee cheated in the past do not take thechemical based on the review of blind
4、ly pursuing problems,distracting,as a result,the devil is in the nest,looksvery simple question,often one false move may lose the gamebecause of a neglected details.It can be seen that in thecultivation and improvement of the pursuit of competence,thebasic and applied knowledge of knowledge,as well
5、as theexpansion of knowledge,cannot be ignored or ignored.2.Attach importance to the structure and integrity of backboneknowledgeDue to the comprehensive examinations in disciplines has becomethe main direction of the proposition,therefore,should bepaid attention to when reviewing in the chemical co
6、ntent beforeand after the mutual penetration,the ability to improve theircombined with more knowledge to answer the question.In fact,the college entrance examination is not only an isolatedknowledge point,but a flexible and comprehensive applicationof all parts.Therefore,when reviewing chemistry,exa
7、mineesshould not only summarize and comb the previous reviewedcontents,but also extract and sublimate some of them,and storethem in the brain in an orderly manner.This structural andintegrated review of the backbone knowledge not only benefitsthe memory of knowledge,but also improves the ability of
8、peopleto deal with problems in the process of structuring theknowledge.,for example,the hydrocarbon oxygenatedderivatives of alcohol,aldehyde,the relationship betweencarboxylic acid,ester can constitute a network,from thenetwork,we can not only qualitatively from their conversionof functional groups
9、 to understand their structure andproperties of the connection and difference,from type ofdifference quantitatively recognize the transformationbetween them,so as to provide basis for the inference of theorganic matter.3.Pay attention to the uniqueness of chemical reviewChemistry is a subject which
10、combines the nature of science andscience and is often referred to as the liberal arts inscience.It is characterized by the fact that chemistry is nota neat and complete formula,like physics,but rather acollection of scattered points of knowledge.Especially inelements and organic chemistry,there are
11、 many characteristicsthat are irregular,which means that chemistry cannot beseparated from memory and recitation.Some of the principlesand special cases of chemistry are often set by the collegeentrance examination group,which can cause mistakes.So itsimportant to be familiar with your textbooks,and
12、 to keep inmind every equation,every reaction,these are clues to thefuture.4.Consciously master the rules and essence of chemistry whenyou do the questionsThe so-called law and essence is the chemical principlerequired by high school chemistry.There are not manyprinciples involved in high school che
13、mistry,so it is notdifficult to master them.The hard part is to get to the bottomof the fascinating aspect of the subject,which is that thequestion provides the information,This information is also related to which chemical principles,which should test your knowledge.If you are confused by aseemingl
14、y untouchable title,the more you look at it,the moreconfused you will be,at this point,you will have to calmlyanalyze and find out the nature of the problem,and the problemwill be solved.Of course,it is not enough to look at theessence,but also find the solution to solve the problem.Ifthe principles
15、 of chemistry can be learned in the textbook,thenthe rules need to be summarized and summarized in the courseof the study.When doing exercises,dont just do the problem,but keep summarizing:which topics belong to a category;Thereare several ways of asking the same question,and there areseveral ways o
16、f thinking about it.What topics are subject tothe principle,and in what form are they asked.And so on.These summaries dont have to be on paper,but often on yourmind.This can be a difficult and confusing exam,but if youhang on,there will be no small gain.5.Chemical review should pay attention to the
17、comparisonmethodIn the chemical review,if you can apply the contrast methodto review,you can get more than half the effect of the review.So what is the comparison method?The contrast method is a kindof review method that separates the concepts of easy confusionby recognizing the nature of the concep
18、t.For example to comparethree acid(HCl,-H2SO4,HNO3),two kinds of alkali(NaOH,Ca(OH)2),several kinds of elemental carbon,H2 and O2,thenature of the air and water,etc,or a comparison of the basicconcept,theory,such as review elemental and compound,pureand mixture,elements and atoms,oxidation and reduc
19、tion,acidic oxides and alkaline oxide,four basic reaction type andso on,or calculation,based on the solubility of solid matterand mass percent concentration calculation comparisons,candistinguish between understanding the meaning of the conceptof the two links.Also must pay attention to the comparat
20、ivetests,such as preparing and collecting method of H2,O2,CO2comparing,grasp their laboratory the feature of the principle,device,the medicine,operation steps and matters needingattention,etc.Summing up the common model of three kinds ofgas preparation(raw material principle,installation,operation,t
21、est method and the matters needing attention)andthe method of collecting gas,and so on a series of contrast,to the knowledge of the differences and relations between themore clear,clear,its good for students is to solve theproblem.6.Chemical review association methodSo-called association method is t
22、hroughan element associatedwith the nature or purpose of another element,or by a substanceto another substance,using some sort of connection betweenthem,to achieve the effect of associative memory.There areseveral methods,such as network association method,which formthe knowledge network diagram acc
23、ording to the nature of metaland non-metal.Longitudinal association is to master thetransformation relationship between metal,alkaline oxide,alkali and salt,or non-metal,acidic oxide,acid and salt.Horizontal association,master metal and non-metal,metal andacid,metal and salt change relations;Or from
24、 the experimentalmood to lenovo,such as reviewing H2(or C or CO)to restoreCuO,associating with experimental steps,experimentalphenomena,products,etc.It is easy to remember the reaction of the three differentreducers of H2,C,and CO and the reaction of the CuO and theproducts and so on;Or grasp the ch
25、aracteristics of things tothink of,such as oxidation-reduction reaction,capturingoxygen and oxygen loss,determining the oxidant,reducing agent,oxidation reaction,reduction reaction,etc.On the one hand,it makes it easier for us to remember the same type of experimentand the relevant content of knowle
26、dge points.On the other hand,it also helps us to expand the knowledge network and kill twobirds with one stone.7.27 common hot spots of the chemical college entrance examUp from calendar year college entrance examination chemistryexamination paper analysis,college entrance examinationchemistry exam
27、that involves the examination site has 474,butyear after year in the university entrance exam questions arestudy or most of the year the examination site is about 27,thisis the hot spots in the exam.These hot spots are more orless varied in form each year,but a big part is giving awaythe points,and
28、the rest of the questions are not very difficult.It is a guarantee of good grades in the college entranceexamination.Suggested that schoolmates nearly five years ofthe university entranceexam questions carefully analysis andthe experiment topic hot spots in the topic,skilled graspthe hot spots probl
29、em of the problem solving ideas,methods,we should try to be hot spots problem difficulty zero,makethemselves hot spots problem is not allowed in the collegeentrance examination,less loss of marks.The hot topicssummarized in this paper mainly include:1.Comparison andconversion of commonly used measur
30、es in chemistry;2.Oxidation-the concept of reduction reaction;3.Oxidation-thebalance of the reduction reaction equation;4.Concept andcalculation of thermochemical equation;5.Concept andcalculation of pH;6.Particle structure problem;7.Themeaning of avogadros constant;The structure of bonds andcrystal
31、s;9.Periodic law and application of elements;10.Writing of ion equations;11.Comparison of ion concentrationsize;12.Ion co-existence problem;Salt hydrolysis andapplication;14.Chemical reaction rate and chemical balance;15.Al(OH)3 sex and material inspection;Inference of elementsor substances;17.Compo
32、und calculation or solving chemicalproblems with mathematical tools;18.Ionization equilibriumand ionization;19.Calculation of solubility;20.Concentration of solution;21.Organic structure;22.Combustion rules and calculation of organic matter;23.Organicreaction equation;24.New technology problems when
33、 the carrierasks some basic concepts and other questions;25.Reviewing theperiodic table or periodic table of new materials and newelements;Knowledge of chemical energy and environmentalprotection;27.The amount of material will be used throughoutthe examination paper.Dont ignore every knowledge point
34、 in the examFrom the analysis of the chemical test of the past years,theexamination of the chemistry basic knowledge and ability of thecollege entrance examination is from the textbook.Part of theresult good students doing difficult inference problem,synthesis problem with ease,but one had less expo
35、sure tochemical knowledge,such as petrochemical industry,coalchemical industry,agricultural and sideline products,chemical,or are some elemental and compound color,smell,solubility and other physical properties,etc.,often trailingoff,investigate its origin is not familiar with this part ofthe examin
36、ee of textbook content.Therefore,the examinee mustread the textbook in the review stage,not just to see theflowers,but to read,to compare,to connect,to summarize,to remember.Every knowledge point provided by the outlineshould be accurate.Strive to be integrated.9.Chemical problem solving,pay attenti
37、on to three types ofproblems(1)to give a very high level of the known conditions,we shouldwrite down the chemical equation of each step.Then observe theknown quantity in these equations which position,and where theunknown quantity,finally,add and subtract elimination willbe a known quantity and unkn
38、own quantity of the overall reaction,the questions canbe solved,which isoften said that the morecomprehensive thinking to make a comprehensive calculationstep reaction(2)for the subject of the derived type,seemingly hard toanswer,actually should take an examination of is the basicconcept of books,so
39、 the knowledge on the books as long as weunderstand thoroughly,this topic is not difficult to answer.(3)in the case of information,we should adopt the method ofcurrent learning.The so-called information problem is a topicthat contains new information that was never introduced in thetextbook.When doi
40、ng this kind of topic,dare to be big,dareto break through oneself knowledge frame,oneself think correctwant to insist on.In fact,the information is often extendedby some extension of the concept of the book,not as difficultas you might think.10.The test subject mainly focuses on the ability ofexamin
41、ationIn recent years,the chemistry test of the college entranceexamination has increased the examination of the experimentalability and demonstrated the proposition direction of thechemistry part of the college entrance examination in recentyears,which should be worthy of careful study.Review theche
42、mistry college entrance examination experiment part,canttalk soldier,have the condition of the classmate to do theexperiment.Chemistry is built on the basis of experiment,theexaminee in the process of review,on the one hand,attentionshould be paid to consolidate the basic knowledge,payattention to t
43、he scientific and standardized experimentaloperation,correct experiment of data analysis and processing,will often operate frequently people think.It is necessary tomaster the regularity of chemical experiment,and to combinethe principles of chemical experiment and experimental design.,on the other
44、hand,we also need to pay attention to thedevelopment of their abilities,master the many USES of a device,a variety of usage of a device,and flexible use of someinstruments,such as how to use an experimental devicepreparation of a variety of gas,or a variety of differentexperimental device preparatio
45、n of the same kind of gas,andso on,should pay attention to their own design the improvementof experimental ability.11.Experimental basic knowledge requires networkingBasic content including:high school chemistry lab instrumentsand medicines,experiments and experimental skills,materialpreparation and
46、 experiment method,knowledge chart,drawingand safety knowledge,quantitative experiments and erroranalysis,material separation,purification andidentification,design of experiment and comprehensiveexperiment,etc.Chemistry experiment should be focused on,thestudents in the third year review knowledge a
47、nd skills,usinginduction,comparison,summary law,institution transference,form knowledge networks,pay attention to the above keyknowledge system of inductive analogy.In particular,sometypical experiments,such as halogens,should be reviewed inall directions.For example,Cl2s lab method:(1)the principle
48、 of the experiment(2)the selection ofinstruments and the method of assembly(sequence)ofinstruments(4)experimental conditions and control(6)of experimentaldrugs and their interpretation(7)the division,drying,nature experiment(8)emission andenvironmental protection(9)safety matters(10)The examinee sho
49、uld have enough knowledge of these typicalexperiments to make the content and contents of the experimentmaterialized,organized,systematized and tabulated.12.Take the experiment problem in chemistry textbook seriouslyThere are many chemistry experiments in the books of high schoolchemistry.These exer
50、cises are basically based on the knowledgeof textbooks,which are more consistent with the requirementsof the chemistry experiment of the college entrance examination.In addition to some material identification and verificationexperiments,there are some design experiments.For example,the number 9 in