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1、2010 年高三化学复习知识系统归纳（Systematic summary of chemistry review in grade three of senior high school in 2010）Chemistry is easy to forget knowledge One, save 1) with liquid bromine: a thin layer of water then cover and airtight stored in low temperature. 2) hydrobromide: kept in plastic bottles. 3) new gre
2、en water: sealed with brown reagent bottle. 4) iodine: kept in a brown reagent bottle and placed in the dark. Two, the role of matter 1) chlorine: as disinfectant. 2): silver bromide film, photographic paper 3) AgI: artificial rainfall 4) iodine: prevention of goiter 5) starch: to test the existence
3、 of iodine element 6) sodium hypochlorite: bleaching textiles Three, balance problems are easy to ignore 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 1 页，共 30 页1) nitrogen dioxide: the balance between the presence and the four nitrogen oxides 2) the equilibrium constant is only related to temperat
4、ure, and has nothing to do with the concentration and pressure. Four, we should pay attention to the A Vogadero constant 1) rare gases are monatomic molecules 2) gas should be used only 22.4 in the standard condition 3) three sulfur oxide, the standard condition is solid; benzene, toluene, carbon te
5、trachloride, hexane standard condition is liquid. 4) hydrolysis of iron ion, aluminum ion, ammonium ion, and ionization of weak electrolyte 5) white phosphorus P4, between phosphorus and phosphorus is the key six 6) some organic compounds have the same number of chemical bonds in isomers 7) Five, ma
6、tter and its chemical formula 1) fluorite -CaF2 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 2 页，共 30 页2) barite - BaSO4 3) quartz (optical fiber) -SiO2 4) gypsum - CaSO4? 2H2O 5) mature gypsum - 2CaSO4? H2O 6) brochantite (blue vitriol) - CuSO4 5H2O? 7) melanterite - FeSO4? 7H2O 8) alum - KAl (SO
7、4) 2? 12H2O 9) goslarite - ZnSO4 7H2O? 10) awn alum - NaSO4? 10H2O 11) soda - Na2CO3 12) bicarbonate of soda - NaHCO3 13) soda - Na2S2O3? 10H2O Six, metal 1) lightest lithium 2) the heaviest osmium 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 3 页，共 30 页3) lowest melting point mercury 4) the highes
8、t melting point tungsten 5) maximum hardness chromium 6) the content of aluminum is the most in the earth crust 7) the best conductivity is silver 8) ductility is best - gold Seven, element cycle 1) the number of mononuclear particles with the same number of protons, the larger the number of electro
9、ns, the larger the radius 2) atomic radius: the same ion in the electron layer decreases with the increase of atomic number. 3) semiconductor materials near the metal and nonmetal boundaries 4) pesticides in the top right of the periodic table of elements 5) the catalyst and the high temperature res
10、istant material, in the excessive element search Eight, crystal 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 4 页，共 30 页1) the stronger the ionic bond is, the higher the boiling point is 2) the electronegativity difference of BeCl2 and AlCl3: is less than 1.7, which is considered as covalent compou
11、nd 3) substances that can form hydrogen bonds: HF, H2O, NH3 4) crystals: solids with regular geometric shapes with fixed melting points 5) atomic crystals: structure space three-dimensional network structure; properties - high boiling point and high hardness; chemical formula is only the simplest ra
12、tio rather than the molecular formula 6) melting boiling point: atomic crystal ionic crystal molecular crystal (general law is not absolute) 7) the change of molecular crystal states only destroys the Fan Dehua force and does not destroy the chemical bond Nine, the bromine faded material 1) activate
13、d carbon adsorption 2) gasoline, benzene, carbon tetrachloride, - Extraction 3) silver nitrate - reaction 4) active metal, reductive inorganic - redox reaction 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 5 页，共 30 页5) reaction with alkaline substance 6) - substituted phenol 7) dilute hydrocarbon,
14、etc. - addition of Alkynes Ten, nitrogen fixation 1) concept: the process of transforming free nitrogen into compound nitrogen Eleven, easily liquefied gas 1) red litmus paper, only ammonia wet blue gas (test) 2) chlorine gas 3) sulfur dioxide Twelve, ion coexistence 1) the redox reaction between io
15、ns can not coexist: iron ion and iodide ion; iron ion and sulfur ion; ferrous ion and hydrogen ion meet nitrate ion 2) by ion double hydrolysis can coexist: aluminum ion and carbonate ion and bicarbonate ion or sulfur ions or partial aluminum ions iron ions and carbonate ions; Thirteen, ionization 精
16、选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 6 页，共 30 页1) the ionization and hydrolysis processes are endothermic, and the ionization degree increases with the increase of temperature 2) acid-base inhibition of water ionization 3) the dissociation of brine to promote the ionization of influent Four
17、teen, experimental instruments 1) capacity bottle: accurate to 0.01, commonly used specifications have 50ml, 100ml, 150ml, 250ml, 500ml, 1000ml (need to fill in such specifications) 2) burets: accurate to 0.01, common specifications are 25 ml, 50 ml. The solution should be washed 2-3 times before lo
18、ading 3) condensate pipe: the lower end of the water inlet, the upper end of the water, the direction of flow and the direction of steam in the pipe opposite. 4) glass rod: stir or transfer liquid, dip in a small amount of liquid 5) Kai Pu generator: to produce CO2, H2, H2S gas. Fifteen, three place
19、 using cotton regiment 1) when the solid solid heating device produces gas, the cotton 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 7 页，共 30 页mass is placed in the big test tube mouth to prevent the solid powder from entering the duct with the air flow, thus blocking the catheter 2) when the ammon
20、ia is produced in the laboratory, the cotton cluster is placed in the test tube or the gas cylinder mouth to collect ammonia, to prevent ammonia and air convection, and to ensure the purity of ammonia gas collection 3) when large tubes were used for acetylene production in the laboratory, the cotton
21、 balls were placed in the big test tube mouth to prevent the foam from producing into the catheter. 4) without pure NO2 gas, 3.2g Cu reacts with sufficient concentrated nitric acid to produce gas which is always less than 0.1mol 5) there is a chemical bond in any crystal. This is not true,.Eg: rare
22、gas 6) assuming that there is a solution of pH=10, the ionization of water may be promoted or inhibited 7) the ionic crystal changes in state and the ionic bond must be destroyed 8) the pH value of water at normal temperature is equal to 7, the higher the temperature, the smaller the pH value, the g
23、reater the Kw Systematic summary of chemistry review in grade three of senior 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 8 页，共 30 页high school in 2010 First, important basic concepts and terminology: Three. Some laws 1. law of conservation of mass 1) content: the total mass of the substances inv
24、olved in the chemical reaction is equal to the total mass of the substances produced by the reaction. 2) the reason is that atoms are the smallest particles in chemical changes and cannot be subdivided in chemical changes. Therefore, before and after chemical changes, the species of atoms are consta
25、nt, the number is constant, the mass is constant, and the mass is conserved before and after the reaction. 3) application: (1) using the law of conservation of mass for simple calculation. (2) writing and balancing chemical equations. (3) infer the composition and chemical formula of matter 2. A Vog
26、aderos law: 1) at the same temperature and at the same pressure, any gas of the same volume contains the same number of molecules. Four: at the same, the same pressure and the same size, the same number of molecules (i.e., the same amount of substance). The range of use is gas; 精选学习资料 - - - - - - -
27、- - 名师归纳总结 - - - - - - -第 9 页，共 30 页2) inference: Under the same pressure, the volume ratio of gas is equal to the ratio of material to volume; The same temperature and pressure, the gas density ratio is equal to its relative molecular mass ratio; At the same temperature and pressure, the same volum
28、e of any gas mass ratio is equal to its relative molecular mass ratio; Under the same pressure, the volume ratio of any gas to the mass of Tongwen is equal to the inverse ratio of its relative molecular mass; At the same volume, the pressure ratio is equal to the ratio of the amount of material; 3)
29、the relation between molar volume of gas and A Vogaderos law: A Vogaderos law is an important rule for studying the properties of gases, which is applicable to any gas in any situation; The molar volume of gas is applicable to any gas under any condition (a certain temperature and a certain pressure
30、); the molar volume of gas agrees with A Vogaderos law. 22.4L/mol is confined to the condition of the standard case. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 10 页，共 30 页It is a special case of the molar volume of gas and a special case of A Vogaderos law. The law of volume ratio of 3. gas reac
31、tion: At the same temperature and pressure, the gas in the reaction volume of each simple integer ratio; The composition of 4. atoms and nuclei Mass number (A) = proton number (Z) + neutron number (N) Charge number of nucleus = proton number = outer electron number of nucleus = atomic number The dis
32、tribution law of external electrons in 5. nuclei The number of the electron electron layer is up to accommodate 2n2; The outermost electron number does not exceed 8 (K 2) The secondary layer is not more than 18, third bottom layer is not more than 32; The principle of the lowest energy electronic en
33、ergy is always from the lowest layer in the electronic line up, then from inside to outside, ranked in the electronic energy gradually increased, which filled the K layer L layer, L layer is lined with rows of M layer. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 11 页，共 30 页6. common chemical bond
34、s and three bond parameters (bond length, bond energy, bond angle); relation between four kinds of crystals and chemical bonds and intermolecular forces: 7. oxidation reduction reaction law and related concepts: (1) the law of oxidation and reducibility of elements Common metal activity order table
35、K, Ca, Na, Mg, Al, Zn, Fe, Sn, Pb (H), Cu, Hg, Ag, Pt, Au (reduction ability - loss of electron loss ability) were reduced K+, Ca2+, Na+, Mg2+, Al3+, Zn2+, Fe2+, Sn2+, Pb2+ (H+), Cu2+, Hg2+, Ag+ (oxidation ability - enhanced electron capacity) Non metallic activity order table: F O Cl Br I S (reduce
36、d oxidation capacity) F- Cl- Br- I- S2- (reduced capacity enhancement) Periodic table of 8. elements and periodic law of elements (1) periodic law of elements: Contents: the element properties change periodically with the increase of atomic number of elements; The periodic properties of the elements
37、: the essence of change 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 12 页，共 30 页is the inevitable result of nuclear electron configuration changes periodically. (2) periodic table of elements: Structure periodic and family Application - the relationship between the three relations of location, str
38、ucture and nature (3) the change regularity of element metal and nonmetal; the change law of atomic radius and ionic radius 9. factors affecting the rate of chemical reaction and their influence results Internal cause: properties of reactants The concentration of V The pressure V (gas) The external
39、temperature V The catalyst V (catalyst) Other (light, ultrasound, laser, radiation, electromagnetic wave, reactant particle size, diffusion rate, solvent, etc.) 10. conditions affecting chemical equilibrium: 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 13 页，共 30 页(1) concentration: under the same
40、conditions, increasing the concentration of reactants or reducing the concentration of the product, the balance moves toward the positive reaction direction; otherwise, it moves to the direction of the reverse reaction; (2) pressure: when the other conditions are constant, the increase of pressure w
41、ill move the balance to the direction of decreasing the volume of gas, and reduce the pressure balance to move towards the increase of the volume of gas; Note: for the same volume of gas reaction, increase or decrease the pressure balance does not move; If the equilibrium mixture is solid or liquid,
42、 the pressure balance does not change; (3) the change of pressure must change the concentration to make the equilibrium move (3) temperature: when other conditions remain unchanged, increase the temperature balance to the endothermic direction; reduce the temperature balance to the direction of heat
43、 release. (when the temperature changes, the balance will generally move) Note: the catalyst can increase or slow down the rate of positive and negative reactions at the same rate, so adding the catalyst does not affect the equilibrium, but it can shorten the time to reach equilibrium. There is a ge
44、neral relationship in equilibrium: 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 14 页，共 30 页(1) the relationship between reaction constant ratio: whether and to what extent, change the material in the reaction molar ratio is constant (equal to the stoichiometric ratio of the number); (2) mass conse
45、rvation relation: (i. e. the mass of the mixture before and after the reaction is constant); (3) the equivalent relationship: (whether from the reactants or from the reaction product, or from the reactants and products have begun, as long as they meet certain conditions, can form equivalent balance,
46、 equivalent balance judgment usually uses the extreme value method) The principle of 11. columns of Saudi Arabia (equilibrium moving principle): If a condition that changes the equilibrium (concentration, temperature, pressure, etc.) is changed, the equilibrium moves towards weakening the direction
47、of the change. Note: the principle of equilibrium refers to the principle of equilibrium motion, which can only be explained by equilibrium movement. Twelve Effect of noble gas filling on chemical equilibrium: (1) constant voltage rare gas, balance moving direction is 精选学习资料 - - - - - - - - - 名师归纳总结
48、 - - - - - - -第 15 页，共 30 页equivalent to direct decompression (also with dilution effect on solution reaction); (2) the noble gas passing through the constant volume does not move in equilibrium. Note: gases that do not react with substances that balance the mixture can be called rare gases. 13. jud
49、gement of electrolyte and non electrolyte, judgement of strong electrolyte and weak electrolyte: (1) acid and alkali salts are electrolytes; Na2O and other active metal oxides are electrolytes; CO2, P2O5, NH3, etc., and most organic compounds are non electrolytes. (2) strong acid, strong alkali and
50、most salts are strong electrolytes HCl, HNO3, H2SO4, HI, HBr, HClO3, HClO4; KOH, NaOH, Ba (OH) 2, Ca (OH) 2; NaCl, Al2 (SO4) 3, KHCO3, BaSO4 Weak acids, weak bases and water are weak electrolytes: H2SO3H3PO4HFHCOOHCH3COOHH2CO3H2SHClOHCNH2SiO3 (3) judge the strength of acid according to the compariso
51、n of ionization constant of weak acid: Ionization law of 14. water 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 16 页，共 30 页(1) the law of ion product in water: the dependence of H+ and OH- on the two sides of an aqueous solution and the quantitative relationship (2) the factors affecting the ioniz
52、ation equilibrium shift of water: Under normal temperature, the ionization of water is promoted if the C (H+) =10-5mol/L ionized by water is ionized; if the water is ionized by C (OH-) =10-8mol/L, the ionization of water is suppressed. At room temperature, if the C (H+) =10-5mol/L or C (H+) =10-9mol
53、/L in aqueous solution, the ionization of water may be inhibited, and may be promoted. PH value and pH value of 15. solution Hydrolysis of 16. salts (definition, substance, result, law, writing, application) 17. ion equation of writing the true or false standards and rules: Comparison of ion concent
54、ration in 18. electrolyte solutions: 19. galvanic cell and electrolytic cell (1) contrast 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 17 页，共 30 页electrode reaction Ionic tendency A discharge substance or particle Primary battery positive electrode reduction cation Cationic or other oxidants, O2 N
55、egative pole oxidation anion Active metals or other reducing agents, H2 Electrolytic cell cathode reduction 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 18 页，共 30 页cation Strong oxidizing cations Negative pole of power supply anode oxidation anion A metal electrode or a strong reductive anion Posi
56、tive pole of connection power supply (2) discharge sequence of electrode in electrolytic cell Cathode: K+,., Al3+ Zn2+ Fe2+ Sn2+ Pb2 + (H+) Cu 2+ Hg2+ Ag+ Anode: F- oxygen radical (OH-) Cl- Br- I- S2- (3) important reactions 2NaCl+ 2H2O - 2NaOH + H2 + Cl2 = = 2CuSO4+2H2O, 2H2SO4 + 2Cu + O2 = 4OH - -
57、4e - O2 = +2H2O (discharge electrolysis Chi Yangji) 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 19 页，共 30 页O2+2H2O+4e - 4OH - (oxygen corrosion, positive electrode of primary battery) (4) write electrolytic NaCl, HCl, CuCl2, CuSO4, H2SO4, NaOH, Na2SO4 solution electrode type and total reaction fo
58、rmula 20. understanding of all kinds of balance: (1) dissolution equilibrium: BaSO4 exists equilibrium in aqueous solution, and there is no ionization equilibrium; (2) ionization equilibrium: there is no ionization equilibrium for strong electrolyte in aqueous solution; (3) hydrolysis equilibrium: (
59、4) chemical equilibrium: 1. electrolytic salt water: principle reaction Comparison between 2. nitric acid industrial process and sulphuric acid industrial process (1) reaction principle and production process Catalytic oxidation process of nitric acid ammonia in A. industry Cyclic oxidation 精选学习资料 -
60、 - - - - - - - - 名师归纳总结 - - - - - - -第 20 页，共 30 页NH3 NO NO2 HNO3+NO exothermic exothermic exothermic equipment Oxidation furnace Cooling tower Absorption tower B. industrial sulphuric acid contact method FeS2 SO2 SO3 H2SO4 exothermic exothermic exothermic equipment Fluidized bed furnace Contact roo
61、m 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 21 页，共 30 页Absorption tower (2) the chemical equation of reaction A. industrial nitric acid (three reaction) 4NH3 (gas) +5O2 (gas) 4 NO (gas) +6NH3 (gas) +907kJ 2NO (gas) +O2 (gas) = 2NO2 (gas) +113 kJ 3NO2 (gas) +H2O (liquid) = 2HNO3 (liquid) + NO (g
62、as) +136kJ B. industrial sulphuric acid (three reaction) 4FeS2+11O2 2Fe2O3+8SO3 2SO2 (gas) +O2 (gas) 2SO3 (gas) +196.6 kJ SO3+H2O= H2SO4 Smelting of 3. aluminium Raw material: Al2O3, cryolite - Na3AlF6 The reaction principle: cathode: 4Al3+12e=4Al,: 6O2 = 12e=6O2 - anode The total reaction: 2Al2O3=4
63、Al+6O2 = Role: cryolite flux 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 22 页，共 30 页Equipment: electrolyzer 4. ironmaking (see textbook) Raw material: Principle: Reaction: Equipment: Tail gas: 5. steelmaking (see textbook) Raw material: Principle: Reaction: Equipment: Tail gas: 6. synthetic ammon
64、ia (see textbook) The suitable conditions are about 5000C, 200500atm, Fe catalyst 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 23 页，共 30 页Hydrogen and nitrogen cycle: circulating compressor Raw material production (1) N2: air liquefaction evaporation, first out of N2; (2) H2: water and fuel: C+H2O
65、 (g) =CO+H2; CO+H2O=CO2+H2 The comparison between the 7. candidates soda and Solvay: raw material, principle, reaction, recycled material Five. Important data and formulas 1. relative atomic mass - atomic weight; relative molecular mass - molecular weight Several equivalent formulas that are necessa
66、ry to memorize Ar CaCO3 Fe CuO Ar 20100 KHCO3 56 CaO 80 SO3 40 Ca HF Mg3N2 KOH Br MgO NH4NO3 NaOH N2 H2SO4 CO2 SO2 CuSO4 28984464160 Fe2O3 CO H3PO4 N2O Cu Br2 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 24 页，共 30 页CO (NH2) 246% NH4HCO3 35% 3. nitrogen content of several nitrogen fertilizers NH4Cl
67、 26.2% (NH4) 2SO4 21.2% NH4HCO3 17.7% 4. Avogadro constant (NA): 12 grams of carbon containing -12 atoms, an approximate value for 6.02X1023. 5. standard gas molar volume (Vm): About 22.4 liters (gas, standard condition) Standard condition: temperature is 00C or 273K, pressure is 1.01X105Pa or 1atm
68、6. molar mass (M): unit G / mol-1 (g) 7. the amount of substance (n): Amount of substance (mass) = mass (gram) / molar mass (g / F) of matter 8. the amount of substance concentration (C): - friction / lift 9. solute mass fraction (a%) 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 25 页，共 30 页The mas
69、s fraction of solute is =m (solute) /m (solvent) X100% (the same unit up and down) 10. the relationship between the various quantities n=cv 11. calculating the concentration (mass fraction substance concentration and solute solute mass fraction): (a%) =CM/1000 p The dilution of C 12. solution (conce
70、ntration) V (concentrated) = = C (dilute) V (diluted) 13. solution mixed (same solute different concentration) C1V1+ C2V2+ C3V3+. = C mixed V mixed 14. equilibrium conversion rate: the amount of converted reactants that accounts for the amount of reactants starting to reach equilibrium =C (turn) /C
71、(up) X100%; Or alpha =n (turn) /n (up) X100%; or alpha =V (turn) /V (up) X100%; Ion product constant of 15. water: KW=H+OH-=10-14 (250C) PH value of 16. solution (1) PH=-lgH+ H+=10-PH (2) POH=-lgOH- OH-=10-POH 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 26 页，共 30 页(3) 250C, PH+POH=14 The ionizati
72、on degree of 17. electrolyte (alpha) N (ionization) =n (starting) alpha C (ionization) =c (starting) alpha One weak acid solution (such as CH3COOH): H+=C (acid) alpha; a weak base solution (such as NH3.H2O): 0H-=C (base) alpha Six. Pay attention to reading textbooks Before reading is an important pa
73、rt of the general review of chemistry, students should be based on their actual reading, make targeted, true to the leak filled, strengthening the basic role. 1, read common sense content. What are the nonmetallic elements and the metal elements that are the most abundant in the earths crust? Main c
74、auses of formation of acid rain; The cause of carbon monoxide poisoning in human body; Aqua ingredients? What is the mark of the development level of a countrys 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 27 页，共 30 页petroleum industry and so on?. 2. Read the knowledge of industrial production. Fo
75、r example, the raw materials, equipment, product components and so on in the industrial production; at the same time to grasp the necessary production principle. Why should the ore be finely crushed in the boiling furnace? Why absorb three sulfur trioxide without absorption of water in absorption to
76、wer and absorb it with concentrated sulfuric acid? What is added in the smelting of aluminum cryolite? What is the role of limestone in raw materials and so on?. 3. Keep in mind the physical properties of some important substances. Such as naphthalene is a colorless crystal, Yi Shenghua; white phosp
77、horus is a waxy solid; sodium peroxide is yellowish solid; phenol is a colorless crystal, exposing the air because of partial oxidation and small pink colour etc. Combining with the nature of memorizing some material storage methods, such as white phosphorus should be kept in the water; potassium an
78、d sodium should be kept in kerosene; nitrate should be kept in a brown bottle; hydrofluoric acid should be stored in plastic bottles; glass plug and so on with the sodium hydroxide reagent bottle can not bloom. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 28 页，共 30 页4, remember the name and molecu
79、lar material type. Such as carbolic acid (phenol), alum (aluminum), fluorite (CaF2) and so on; for some confusing material, by comparing a deeper impression, such as gypsum, plaster and so on. 5. Read and try to memorize some special or difficult chemical equations. The reaction of aluminum with sod
80、ium hydroxide solution; silver mirror reaction; saponification reaction, polycondensation reaction, etc. 6, pay attention to reading the experimental content. Through reading review to deepen understanding and memory. For example, in the distillation of petroleum, nitration of benzene and preparatio
81、n of ethylene, the thermometer should be used, what is the different method of use? Which water bath heating is needed in common experiments? Why should funnel be used to add water when making acetylene? Why cant acetylene generator be used for acetylene production? Why use saturated salt water inst
82、ead of water? For why vertical glass tube was longer than the? Whats the difference between ethyl acetate and butyl acetate? Why wait?. 7. Read the concepts and principles, deepen the understanding, and strive to clarify the essence. Why is it the same volume of any gas under the same conditions, 精选
83、学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 29 页，共 30 页but the solid and liquid matter is different in 1?; Ionic bond is a chemical bond formed by electrostatic interaction between anion and cation. Why cant it be simply understood as electrostatic attraction and so on?. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 30 页，共 30 页
