初三化学酸碱盐单元测试题以及答案(Test questions and answers of chemistry, acid-base and salt units

初三化学酸碱盐单元测试题以及答案（Test questions and answers of chemistry, acid-base and salt units in junior middle school）This article is contributed by guylovejane

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Third, chemical acid-base salt unit test questions and answers, third, chemical acid-base salt unit test questions and answers

A choice (the following questions only to meet the requirements of a answer, each of 1 points, a total of 15 points) 1. for the rational use of resources, "" garbage "to promote garbage classification recycling, life waste iron, aluminum cans to be classified as a class (A.) recovery, they belong to the organic B. inorganic salt C. metal or alloy D. 2. alkali insoluble iron nails at the following four kinds of environment, easy to rust (A.) is placed in the humid air drying in the air on B. C. immersed in boiling water in oil immersed in D. 3. NaCl, BaCl2, Na2CO3 used to identify three kinds of reagents, a colorless solution is (A.) B. C. lime water dilute sulfuric acid hydrochloric acid D. silver nitrate solution 4. - some food approximate pH as follows: grape 3.5 - 4.5, 2.9 - 3.3, apple, cattle Milk 6.3, - 6.6, egg white 7.6 - 8. The following statement is wrong (A.) hyperacidity people should not eat more acidic than apple B. Apple Juice Grape Juice strong C. egg is a basic food D. Grape Juice can make the purple litmus blue 5. the following products have not been sealed, open after a period of time, the quality of the concurrent increase in biochemistry

the reaction is the concentrated hydrochloric acid and caustic carbonate (4) the significant contribution of concentrated sulfuric acid lime A. B. of the C. D. and the 6. China famous chemist Mr. Hou te Pang () is made of black powder was invented by A. B. to create the hydrometallurgy of soda ash production improved C. D. found 7. of the existing elements Ba (NO3) 2: the solution, KCI solution, the K2SO4 solution, the CuSO4 solution, without other reagents, through the experimental method of them will distinguish, identification Out of order

(A.) may be the description of the B. and the C. D. 4 1 4 8 of

8 in the 8. to Fe, Cu containing a beaker with excess sulfuric acid, solute in solution (a) the addition of excess zinc powder mixed solution of A.1 B.2 C 3 D 4 9.CuCI2 and MgCl2, after full reaction, filtration, filter paper material (A.Zn) is B.Cu C.Zn and Cu D.Cu and Mg 10. does not meet the acid and salt reaction of another acid and another salt "(A.) is the reaction of hydrochloric acid and sodium nitrate solution of dilute sulfuric acid and B. barium chloride solution

C. dilute hydrochloric acid and colored wastewater

D. silver nitrate solution of nitric acid and calcium carbonate factory emissions 11. by the determination of PH=2 for wastewater treatment, the wastewater should be adjusted to PH = 7 ~ 8, for this purpose, and the economical and feasible method, adding this wastewater (A.) lime B. sodium hydroxide C. iron D. HCl 12. iron ore (containing Fe203) as raw material of iron, carbon monoxide (A.) oxidation reduction agent B. containing Fe3+ agent C. catalyst D. 13. fuel a solution of Mg2+, S042-, NO3-, Fe3+, Mg2+, the number of S042- is 3:3: 1, that Fe3+ in solution the number of N03-, S042-, B.1:2:1 C.3:1:15 (A.3:2:1) is more than 14. D.3:1:13 respectively, take a small amount of material

added to the following groups at the same time get enough water, colorless and transparent solution Is (B.Na2CO3, CaCl2, Zn) A.FeCI3 (NO3) 2, Ba (OH) 2, KNO3, C.CuS04, KCI, NaCI, D.MgCl2, NaN03, Na2S04 15. to remove the impurities in brackets, the reagent is not correct (A.NaOH) solution (Na2CO3) with dilute hydrochloric acid B.C (CuO) with dilute sulfuric acid C.

NaCl [Ba (OH) 2] solution of copper sulfate solution D.MnO2 (KCl) with water two, multiple-choice questions (the following questions have a satisfactory answer, 2 points for each question, the total of 10 points) 16. put enough iron, were added to the solution of the following groups of material, full reaction filtration is only the filtrate (A.Na2S04 CuSO4), B.H2SO4 CuS04 C.HCl H2SO4 D.CuCl2 Cu (N03) 217. solution in the following income after the material reacts with hydrochloric acid, sodium hydroxide solution, can produce a reddish brown precipitate is A.Fe B.Fe2O3 C.CuO D.FeO 18. the following were substances in the water, chemical reactions occur, but no precipitation generation, and no gas is released (A.CaCl2), KOH, Na2C03, B.NazC03 BaCl2, HCI C.K2SO4, HCI NaOH, D.CuS04, HCl, NaCl 19. will be a clean Net nails in the dilute sulfuric acid, are as follows: to create bubbles in the surface of nails; the colorless solution become light green; the quality of the iron loss; the quality of the solution increased, the above description is correct (A.) in the B. and the C. The D. of the sewage and the sewage emissions of acid and ethylene plant emissions of 20. a chemical plant, a total of 6 kinds of ions containing the following 3 types: K+, 22+ + OH, 3, 3, 3 C0 Ba H NO ion of ethylene plant emissions of sewage containing is ()

A.K, OH, H

B.K, OH C03, 2+

C.Ba, OH NO3 + 2+,

D.OH, K, Ba, three choice: the following questions, there are 1 ~ 2 options (with each of 2 points, the total of 10 points) 21. drops of phenolphthalein solution with barium hydroxide and each of the following substances exactly the solution after the reaction, still red (B.Na2CO3 C.H2S04) is transformed into A.C02 D.Na2SO4 2 groups to achieve the following substances (A.BaCO3, BaCI2) is (solution) - BaCO3: B.CaCO3 - CaO - Ca (OH) 2 (solution), NaOH (solution) C. Cu - Cu0 - Cu (OH 2), CuSO4 (solution) D.Fe2O3 - Fe - FeCI3 (solution), Fe (OH) 323. to show that long-term exposure to concentrated NaOH solution in the air has been part of a student take a sample of 2mI modification, in a test tube, and then the following experiment, which can achieve the purpose of PI (A.) is a small amount of salt To observe the phenomenon of B. acid, adding lime water clarification, observe the phenomenon of C. adding barium chloride solution, observe the phenomenon of D. through the amount of CO2 gas, observe the phenomenon of a pack of 25. white solid may consist of one or several kinds of sodium carbonate, potassium sulfate, sodium chloride, the style a little soluble in water, adding an excess of barium chloride solution, producing a white precipitate, the precipitate is insoluble in dilute nitric acid. Filter, added with silver nitrate solution with nitric acid to produce a white precipitate in the filtrate, the original is composed of solid material (A.) in certain K2SO4 B. must have NaCl C. must have Na2CO3 D. may have NaCl four, fill in the blanks (the total of 40 points) 26. points) with the material used mainly preserved eggs with soda ash, salt, lime, ash (the main component is (4 potassium carbonate), water and other substances, when they need to be mixed and stirred, according to the knowledge of chemical reaction equation can be written: -- -- -- -- -- --

-- - 27. (2 points) iron products into dilute hydrochloric acid cleaning, solution to yellow, and often produce bubbles, the chemical reaction equation It is 28. (2 points) that a bright wire is inserted into the solution of copper sulfate. After a while it is removed. The surface of the iron wire is covered with a layer of red substance, which shows that the activity of iron is more active than that of copper. An exothermic phenomenon occurs when 29. (2 points) are added to the water or the substance.

+

-

+

+

-

2-

Thirty

(4 points) on a piece of white paper in dry spraying of A, B,

C three kinds of colorless liquid, when spraying A filter has no obvious change, then spray B on filter paper was one of the red house, finally C sprayed red house disappeared again, answer the following questions: the filter paper house in advance is used to draw the reagent. Colorless solution A is;

B is;

C is. 31. (7) with potassium hydroxide as an example,

according to the nature of the main chemical properties of alkali, potassium hydroxide and write, write the relevant chemical equation. Chemical properties

32. (5) shows the following facts: (1) with the chemical formula of lime open dumps gradually deteriorated (2) with soda and lime manufacture of caustic soda industry (3) adding hydrochloric acid to soda, there is a large amount of gas release (4) scale boiler can use hydrochloric acid cleaning (5) put nails in the surface of mercuric nitrate solution will produce a silver white matter 33. (9 points) copper sulfate and some substances can react, please write 3 chemical equations and experimental phenomena, and explains purpose in the production of life. The chemical equation (1) and (2) and alkali metal salt and (3) answer: (1) the first step experimental phenomena observed in experiments; (2) the third step experiment on filter paper A, filter paper is B; (3) the excess C solution with fourth step experiment. Its purpose is to. Five, answer questions (4 points), phenomenon, use

35. (4) of known hydrochloric acid solution containing water molecules (H acid chloride (Cl) and hydrogen ions (H, O)), the solution can make the purple litmus red. Would you please guess in hydrochloric acid solution which is likely a particle that purple litmus red? And design experiment to verify your guess, write the experiment steps briefly, the observed phenomena and the resulting conclusions. Conjecture:

Experimental procedures, experimental phenomena, experimental results

Six, inference questions (the total of 21 points) 36. (5) from a laboratory, may contain one or more ferric chloride, sulfuric acid, sodium sulfate, sodium chloride, sodium hydroxide, sodium carbonate and barium nitrate. Third chemical extracurricular activities group of students are as follows: (1) test of waste liquor from observation, is a colorless solution; (2) take the waste, to which adding barium chloride solution, a white precipitate, adding dilute nitric acid, no obvious phenomenon; (3) another waste, which added to the iron powder later, produced a lot of bubbles. According to the above test phenomenon can be inferred that the waste liquid must contain, certainly does not contain, can not be sure whether it contains. 37. (5) with iron, copper, Potassium Permanganate, four kinds of dilute hydrochloric acid as the raw material, adopts two different methods to produce ferrous chloride, please write the chemical equation. 38. (11 points) the construction of the subway in the ancient capital of Nanjing has broken ground. In order to study the artifacts excavated from the subway construction site, the archaeological interest group conducted experiments on the surface materials A and B of two artifacts, such as TON

HCL, A, reddish brown solid, C yellow solution

NaOH solution

D reddish brown precipitate

High temperature

J black powder H E colorless liquid I B green powder plus F black

powder, dilute H2SO4 K blue solution, G colorless gas L red solid

(1) please infer the chemical formula of the following substances according to the above experimental phenomena: B; C; D; J; E; F; G;

(2) write down the chemical equation of the following transformations: C = D; E = H+I; J + K = L. (3) in museums, it is rare to see the intact artifacts made by J. What is the reason?.

Reference answer

Choice questions answer No. No. four, answer to fill in the blanks (each 1 points) 26. CuO+H2O = Ca (OH) Na2CO3 Ca (OH) 2 + 2 = CaCO3 + 2NaOH 27. Fe2O3 + 1: 6HCl = 2FeCl 3 + 3H2O 28. Cu, 29. CaO thick H2SO4.

水 naoh naoh 溶液或酚酞酸溶液 h2so4 k2co3＋ca (oh) 2 = caco3↓＋2koh ②fe＋2hcl＝fecl2 + h2↑ d a b c d b b ad comic cartoon ad 14 15 16 17 18 19 20 21 22 23 24 25 c a d c b c a b d 1 1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13

30. 酚酞或 naoh 溶液 31. (答案略). ⑴ cao＋h2o＝ca (oh) 2

ca (oh) 2＋co2＝caco3↓＋h2o

⑵ 2＝caco3↓＋2naoh ⑶ na2co3＋2hcl＝2nacl＋co2↑＋h2o

na2co3＋ca (oh)

⑷ caco3＋2hcl＝cacl2＋h2o＋co2↑ ⑸ fe＋hg (no3) 2＝fe (no3) 2＋hg 33. 化学方程式⑴ 与金属⑵与碱⑶与盐 cuso4＋2naoh ＝na2so4＋cu (oh) 2↓ cuso4＋bacl2＝baso4↓＋cucl2 生成蓝色↓ 生成白色↓ 检验 cu2 + 或 oh －、oh 沉淀 cu2 +. (4 或检验沉淀 ba2 + 2 so 4. 、ba2 +

－

现象铁表面有红色金属

用途湿法炼铜

cuso4＋fe＝feso4＋cu

34. (1) 黑色粉末溶解生成蓝色溶液 fe、cu (2), (3) h2so4, feso4

除去过量的铁

五、简答题 (每空 1 分) 猜想: h + 能使紫色石蕊变红实验步骤在水中滴入紫色石蕊在 nacl 等可溶性氯化物溶液中滴入紫色石蕊六、推断题 (第 1 空 1 分, 后两空每空 2 分) 36. h2so4, naoh, ba (no3) 2 prepared with nacl na2so4, na2co3, h2o, and 实现现象不变色不变色实验结论不能使石蕊变红不能使石蕊变红, 盐酸

中能被石蕊变红的是 h

＋－

37. (1 2kmno4 每个方程式分)

k2mno4＋mno2＋o2↑

fe＋2hcl＝fecl2＋h2↑

2cu＋o2? 2cuo cuo＋2hcl＝cucl2＋h2o fe＋cucl2＝fecl2＋cu

38. (每空 1 分) (1) b、cu2 (oh) 2co3 f、cuo c、fecl3 g、co2 d、fe (oh) 3 j、fe e、h2o

(2) c→d、fecl3＋3naoh＝3nacl＋fe (oh) 3↓ e→h＋i、2h2o 通电2h2↑＋o2↑ j＋k→l、fe＋cuso4＝feso4＋cu (3) 化学性质较活泼, 易被氧化

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初三化学酸碱盐单元测试题以及答案初三化学酸碱盐单元测试题以及答案

一、选择题 (以下各题只有一个符合要求的答案, 每题 1 分, 共 15 分) 1.为合理利用 "垃圾 '资源, 提倡垃圾分类回收, 生活中废弃

的铁锅、铝制易拉罐以归为一类加以回收, 它们属于 () a.有机物b.无机盐 c.金属或合金 d.难溶性碱 2.将铁钉置于下列四种环境中, 容易生锈的是 () a.置于潮湿的空气中 b.置于干操的空气中 c.浸没于煮沸的水中 d.浸没于油中 3. 能一次性鉴别 nacl 、bacl2 、 na2co3, 三种无色溶液的试剂是 () a.稀硫酸 b.盐酸 c.石灰水 d.硝酸银溶液 4 些食物的近似 ph 如下: 葡萄 3.5 - 4.5, 苹果 2.9 - 3.3 牛奶 (- 6.6 鸡蛋清 7.6 - 8.0.下列说法错误的是 () a.胃酸过多的人不应多食苹果 b.苹果汁的酸性比葡萄汁强 c.鸡蛋清是碱性食物 d.葡萄汁能使紫色石蕊试液变蓝 5.下列药品未经密封保存, 敞口放置一段时间后.

The quality and increase the occurrence of the chemical reaction of the carbonate and hydrochloric acid (caustic). The major contribution of concentrated sulfuric acid lime A. B. of the C. D. and the 6. China famous chemist Mr. Hou te Pang () is made of black powder was invented by A. B. to create hydrometallurgy C. improved the production of sodium carbonate D. found a new element 7. existing Ba (NO3) 2: the solution, KCI solution, the K2SO4 solution, the CuSO4 solution, without other reagents, through experimental methods will distinguish them one by one, the identified sequence may be (A.) and the

B. of the individual or group of

C. and group II. The

D. of the

8. to Fe, Cu containing the beaker with excessive dilute sulfuric acid, the solute solution. (A.1) B.2 C 3 D 4 Addition of excess zinc mixed solution of 9.CuCI2 and MgCl2, after full reaction, filtration, filter paper material (A.Zn) is B.Cu C.Zn and Cu D.Cu and Mg 10. does not meet the acid and salt reaction of another acid and another salt "(A.) is the reaction of hydrochloric acid and sodium nitrate solution dilute B. sulfate and barium chloride solution

C. dilute hydrochloric acid and colored wastewater

D. silver nitrate solution of nitric acid and calcium carbonate factory emissions 11. by the determination of PH=2 for wastewater treatment, the wastewater should be adjusted to PH = 7 ~ 8, for this purpose, and the economical and feasible method, adding this wastewater (A.) lime B. sodium hydroxide C. iron D. HCl 12. iron ore (containing Fe203) as raw material of iron, carbon monoxide (A.) oxidation reduction agent B. containing Fe3+ agent C. catalyst D. 13. fuel a solution of Mg2+, S042-, NO3-, Fe3+, Mg2+, the number of S042- is 3:3: 1, that Fe3+ in solution

the number of N03-, S042-, B.1:2:1 C.3:1:15 (A.3:2:1) is more than 14. D.3:1:13 respectively, take a small amount of material added to the following groups at the same time get enough water, colorless and transparent solution Is (B.Na2CO3, CaCl2, Zn) A.FeCI3 (NO3) 2, Ba (OH) 2, KNO3, C.CuS04, KCI, NaCI, D.MgCl2, NaN03, Na2S04 15. to remove the impurities in brackets, the reagent is not correct (A.NaOH) solution (Na2CO3) with dilute hydrochloric acid B.C (CuO) with dilute C.NaCl sulfate solution [Ba (OH) 2] copper sulfate solution D.MnO2 (KCl) with water two, multiple-choice questions (the following questions have a satisfactory answer, 2 points for each question, the total of 10 points) 16. put enough iron, were added to the solution of the following groups of material, full reaction filtration that is only the filtrate (A.Na2S04 CuSO4), B.H2SO4 CuS04 C.HCl

H2SO4 D.CuCl2 Cu (N03) 217. solution in the following income after the material reacts with hydrochloric acid, sodium hydroxide solution, can produce a reddish brown precipitate is A.Fe B.Fe2 O3 C.CuO D.FeO 18. the following were substances in the water, chemical reactions occur, but no precipitate, no gas is released (A.CaCl2), KOH, Na2C03, B.NazC03 BaCl2, HCI C.K2SO4, HCI NaOH, D.CuS04, HCl, NaCl 19. will be a clean nails in the dilute sulfuric acid, are: the bubbles in the nail surface; the colorless solution become light green; the quality of the iron loss; the quality of the solution increased, the above description is correct (A.) in the B. and the C. The D. of the sewage and the sewage emissions of acid and ethylene plant emissions of 20. a chemical plant, a total of 6 kinds of ions containing the following 3 types: K+, 22+ + OH, 3, 3, 3 C0 Ba H NO ion of ethylene plant emissions of sewage containing is ()

A.K, OH, H,

B.

k 、oh 、c03 2 + + 2 + c, 、oh 、no3 d.oh 、k 、ba 三、选择题: 以下各题, 有 1～2 个选项符合题意 (每题 2 分, 本题共 10 分) 21.滴有酚酞的氢氧化钡溶液与下列各物质恰好完全反应后, 溶

液仍显红色的是 () a.c02 b.na2co3 c.h2s04 d.na2so4 2 下列各组物质的转化能实现的是() a.baco3→baci2 (溶液) →baco3↓

b.caco3→cao→ca (oh) 2 (溶液) →naoh (溶液)

c. cu→cu0→cu (oh) 2→cuso4 (溶液)

d.fe2o3→fe→feci3 (溶液) →fe (oh) 3 23.为

了证明长期暴露在空气中的氢氧化钠浓溶液已部分变质, 某同学先

取 2mi 试样于试管中, 而后进行如下实验, 其中丕能达到目的的

是 () a.加入少量盐酸, 观察现象 b .加入澄清石灰水, 观察现象 c. 加入氯化钡溶液, 观察现象 d.通适量 co2 气体, 观察现象 25. 一

包白色固体可能由碳酸钠、硫酸钾、氯化钠中的一种或几种组成, 取式样少许溶于水, 加入过量的氯化钡溶液, 产生白色沉淀, 该沉

淀不溶于稀硝酸.过滤, 在滤液中加入用硝酸酸化的硝酸银溶液产

生白色沉淀, 则原固体物质的组成中 () a.一定有 k2so4 b. 一定有nacl c.一定有 na2co3 d.可能有 nacl 四、填充题 (本题共 40 分) 26. 分) 制作松花蛋所用的配料主要有纯碱、食盐、生石灰、草木灰(主要成分是 (4 碳酸钾) 、水等物质时需要将它们混合并充分搅拌, 制作, 根据所学知识写出能反应的化学方程式:

------------------------------------ (. 27 (2 分) 铁制品放入稀盐酸中除锈时, 溶液变黄, 并常有气泡产生, 有关化学反应的方

程式是① ② 28. (2 分) 将一根光亮的铁丝插入硫酸铜溶液中, 过一会儿取出, 铁丝表面覆盖一层红色的物质是, 这说明铁的金属活

动性比铜. 29 (2 分) 向水中加入或物质后会产生放热现象.

+

-

+

+

-

2 -

30. (4 分) 在一张洁白干燥的滤纸上依次喷洒 a、b、c 三种无色液体, 当喷洒 has 时滤纸无明显变化, 再喷洒 b 时滤纸上显出一

间红色小屋, 最后喷洒 c 时红色小屋又消失了, 回答下列问题: 滤

纸上的小屋事先是用试剂画出的.无色溶液 has 是是; b; c 是. 31. (7 分) 以氢氧化钾为例, 根据碱的通性, 写出氢氧化钾的主要

化学性质, 并写出有关的化学方程式. 化学性质化学性质

32. (5 分) 用化学方程式说明下列事实: (1) 露天堆放的生石灰逐

渐变质 (2) 工业上用纯碱和熟石灰制取烧碱 (3) 向纯碱中加入盐酸, 有大量气体放出 (4) (5) 锅炉中的水垢可以用盐酸来清洗铁

钉放在硝酸汞溶液中表面会产生一种银白色的物质 33. (9 分) 硫

酸铜与某些物质能发生反应, 请写出 3 个化学方程式和实验现象,

并分别说明在生产生活中的用途. 化学方程式与金属 (1) (2) (3) 与盐与碱回答: (1) 第一步实验中观察到的实验现象是; (2) 第三步实验中滤纸上 has 是, 滤纸中 b 是; (3) 第四步实验中加入过

量的 c 溶液是, 其目的是. 五、简答题 (本题共 4 分) 现象用

途

35.

(4) hydrochloric acid solution containing known acid water molecules (H chloride (Cl) and hydrogen ions (H, O)), the solution can make the purple litmus red. Would you please guess

in hydrochloric acid solution which is likely a particle that purple litmus red? And design experiment to verify your guess, write the experiment steps briefly, the observed phenomena and the resulting conclusions. Conjecture:

Experimental procedures, experimental phenomena, experimental results

Six, inference questions (the total of 21 points) 36. (5) from a laboratory, may contain one or more ferric chloride, sulfuric acid, sodium sulfate, sodium chloride, sodium hydroxide, sodium carbonate and barium nitrate. Third chemical extracurricular activities group of students are as follows: (1) test of waste liquor from observation, is a colorless solution; (2) take the waste, to which adding barium chloride solution, a white precipitate, adding dilute nitric acid, no obvious phenomenon; (3) another waste, which added to the iron powder later, produced a lot of bubbles. According to the above test phenomenon can be inferred that the waste liquid must contain, certainly does not contain, can not be sure whether it contains. 37. (5) with iron, copper, Potassium Permanganate, four kinds of dilute hydrochloric acid as the raw material, adopts two different methods to produce ferrous chloride, please write the chemical equation. 38. (11 points) the construction of the subway in the ancient capital of Nanjing has broken ground. In order to study the artifacts excavated from the subway construction site, the archaeological interest group conducted experiments on the surface materials A and B of two artifacts, such as TON

HCL, A, reddish brown solid, C yellow solution

NaOH solution

D reddish brown precipitate

High temperature

J black powder H E colorless liquid I B green powder plus F black powder, dilute H2SO4 K blue solution, G colorless gas L red solid

(1) please infer the chemical formula of the following substances according to the above experimental phenomena: B; C; D; J; E; F; G;

(2) write down the chemical equation of the following transformations: C = D; E = H+I; J + K = L. (3) in museums, it is rare to see the intact artifacts made by J. What is the reason?.

Reference answer

Choice questions answer No. No. four, answer to fill in the blanks (each 1 points) 26. CuO+H2O = Ca (OH) Na2CO3 Ca (OH) 2 + 2 = CaCO3 + 2NaOH 27. Fe2O3 + 1: 6HCl = 2FeCl 3 + 3H2O 28. Cu, 29. CaO thick H2SO4. NaOH water NaOH strong acid solution or phenolphthalein solution H2SO4 K2CO3 + Ca (OH) 2 =CaCO3: 2KOH II Fe2HCl = FeCl2+H2 = D A B B C D B BD B AD BD AD 1415161718192021 A A D C 22232425 C C D B C A A B 12345678 D 910111213

30. phenolphthalein or NaOH solution (answer 31. omitted) 32.

- CaOH2O = Ca (OH) 2

Ca (OH) 2CO2 = CaCO3: H2O

The Na2CO3Ca (OH) 2 = CaCO3 = = 3: 2NaOH Na2CO32HCl 2NaClCO2 H2O

CaCO3 + 2HCl = CaCl2 + H2O + CO2 = Fe + Hg (NO3) is 2 Fe (NO3) = 2 + 33. Hg and the chemical formula 1 and 3 and alkali metal salts of CuSO4 + 2NaOH = Na2SO4 + Cu (OH) 2: CuSO4 + BaCl2 = BaSO4 + CuCl2 down to form a blue white key generation the decrease in Cu2+ test or OH precipitation of Cu2 +, OH 2? SO 4 or Ba2+ 2 precipitation test and Ba2+ SO 4?

-

The surface of the iron has red metal

The use of copper hydrometallurgy

CuSO4Fe = FeSO4Cu

34. (1) black powder dissolves to form blue solution (2) Fe, Cu, (3) H2SO4, FeSO4

Remove excess iron

Five, short answer questions (each 1 points) guess: H+ can make the purple litmus red experimental steps in the water drops in the purple litmus NaCl soluble chloride solution drops into the purple litmus inference questions (first six, 1 points, two

empty each 2 points) 36. H2SO4, FeCl3 Ba (NO3) 2 NaOH Na2CO3, NaCl Na2SO4 discoloration discoloration phenomenon experiment conclusion H2O can make Cl can not make the litmus red litmus red, hydrochloric acid can be litmus red is H

+ -

37. (1 per equation) 2KMnO4

K2MnO4MnO2O2 hav'e

Fe2HCl = = FeCl2H2

2CuO2? 2CuO = CuO2HCl CuCl2H2O FeCuCl2 = FeCl2Cu

38. (1 cents per hour) (1) B, Cu2 (OH), 2CO3, CuO, C, FeCl3, G, CO2, D, Fe (OH), 3, J, Fe, E, F, H2O

(2) C, D, FeCl33NaOH = 3NaClFe (OH): 3 E, HI, 2H2O power 2H2 = O2 = JK, L, FeCuSO4 = FeSO4Cu (3) chemically active and easily oxidized

One