上海教育出版社九年级下化学练习册答案
九年级下册化学补充习题答案沪教版

九年级下册化学补充习题答案沪教版第一节物质的溶解课内训练1.将下列物质分别加人足量水中,充分搅拌后能形成溶液的是( )。
A.味精B.面粉C.精制油D.石灰石 2.下列是生活中常见的液体,其中不属于溶液的是( )。
.A.白醋B.牛奶C.消毒酒精D.蔗糖水 3.对溶液的下列认识中,正确的是( )。
A.一种或几种物质分散到另一种物质里,形成的均一、稳定的混合物叫做溶液B.溶液都是无色透明的、均一的、稳定的混合物C.植物油溶入汽油中可形成不稳定的乳浊液D.一杯完全溶解的糖水放置一段时间后,溶液的上半部分一定比下半部分甜 4.下列各项措施中,不属于乳化在日常生活或生产中的应用的是( )。
A.用洗洁精洗去碗筷上残留的油污 B.用肥皂洗去衣服上的油污 C.用洗衣粉洗去棉织物上的油污 D.用食醋清除热水瓶中的水垢 5.下列各种生活应用巾,不属于溶液的应用的是( )。
A.医院里使用消毒酒精对皮肤、体温计等消毒 B.用熟石灰粉等物质配制粉刷内墙的涂料C.长跑运动员赛跑途中服用葡萄糖口服液来补充能量D.夏秋季节,如果皮肤上生了疖子,可用碘酒涂擦患处6.严冬时节,我国北方某些城市曾用食盐融雪,造成土壤中含盐量偏高,使路旁树木死亡。
目前专家已研制出一种新型融雪剂,既能融化冰雪,又能起施肥养护树木的作用。
具有上述作用的新型融雪剂含有的成分可能是( )。
A.氯化钠、氯化钙B.氯化钠、氯化镁C.氯化钠、醋酸钙镁D.尿素、硝酸钙、硝酸镁 7.从一杯高锰酸钾溶液的上层取出少量液体,测得它的密度是“ag·cm-3,再从高锰酸钾溶液的下层取出少量液体.经测定它的密度是_____g·cm-3。
通过这一实验,你对溶液的认识是_____。
8.金属能导电,是因为____;某些物质的水溶液如____、____也能导电,是因为____。
而____、____等不能导电,是因为_________。
9.小英在做饭时,发现很多因素都能影响食盐在水中溶解的速率。
九年级下册化学练习册答案沪教版

【导语】以下是为您整理的九年级下册化学练习册答案沪教版,供⼤家学习参考。
第⼗单元课题1第1课时 【优效⾃主初探】 知识点⼀ 1.⽯蕊酚酞 2.(1)红蓝(2)⽆红 知识点⼆ 1.(2)①除锈盐酸 ②精炼⽯油吸⽔⼲燥剂 2.题⽬略 (1)炭 (2)发烫液滴飞溅放出⼤量的热 (3)⼤量⽔3%~5%的碳酸氢钠 【⾼效合作交流】 要点突破 [探究⼀] 1.题⽬略 (1)提⽰:万寿菊和胡萝⼘的汁液不能区别两种溶液,不能作酸碱指⽰剂。
(2)提⽰:牵⽜花。
2.提⽰:分别取适量溶液放⼊三⽀试管中,分别滴加⼏滴紫⾊⽯蕊溶液。
液体变红的试管内盛有的是盐酸,液体变蓝的试管内盛有的是澄清⽯灰⽔,液体呈紫⾊的试管⾁盛有的是蒸馏⽔。
【例题1】A解析:题图中两圆相交的部分,分别表⽰指⽰剂与酸、碱溶液作⽤时所显⽰出的颜⾊。
A表⽰⽯蕊与酸作⽤,应呈现红⾊,A项错误;B表⽰⽯蕊与碱作⽤,应呈现蓝⾊;C表⽰酚酞与碱作⽤,应呈现红⾊;D表⽰酚酞与酸作⽤,应呈现⽆⾊,B、C、D选项都正确。
训练 1.B解析:⾷盐⽔显中性,稀硫酸显酸性,⽯灰⽔显碱性,只有⽯蕊溶液在酸性、碱性和中性溶液中显⽰三种不同的颜⾊,故选B。
[探究⼆] 1.提⽰:盐酸;碳酸和硫酸;硫酸。
2.提⽰:浓盐酸有挥发性.敞⼝放置因氯化氢挥发到空⽓中造成溶质的质量减⼩,溶液质量减⼩,溶质质量分数减⼩;浓硫酸有吸⽔性,敞⼝放置使溶剂质量增⼤,溶液质量增⼤,但溶质质量分数减⼩。
3.提⽰:⽤酸除铁锈时,不能将铁器长时间放在酸溶液⾥浸泡,因为铁锈除去后,、铁也能与酸反应。
【例题2】B 训练 2.D 达标检测 1.B解析:⾷醋含醋酸,可乐含碳酸,稀硫酸含硫酸,⽯灰⽔含氢氧化钙。
2.D解析:紫⾊⽯蕊溶液遇酸性溶液变红,遇碱性溶液变蓝,氨⽔呈碱性,所以向2mL氨⽔中滴加5~6滴紫⾊⽯蕊溶液,充分振荡后溶液颜⾊将变成蓝⾊。
3.C解析:A项,汽⽔中的⼆氧化碳逸出,溶液的质量和溶质的质量分数都减⼩;B项,浓盐酸具有挥发性,溶液的质量和溶质的质量分数都减⼩;C项,浓硫酸具有吸⽔性,溶质质量不变,溶液质量增加,溶质的质量分数减⼩;D项,饱和⾷盐⽔⼏乎不变,溶液质量和溶质的质量分数均不变。
上教版(沪教版)九年级化学补充习题(上下册)参考答案【最..

上教版(沪教版)九年级化学补充习题(上下册)参考答案第一章第一节1-5C D D D B6、45.6吸烟的危害有:会引起肺癌和心血管疾病。
并且生活在自己周围的亲人有吸二手烟的风险课外拓展现象:白色固体逐渐减少,试管内壁出现小水珠,生成一种能使澄清石灰水变浑浊的气体,同时生成一种有刺激性气味的气体;碳酸氢铵固体发生了分解生成了水、二氧化碳和氨气7、略第二节1-6C C B D B B⑤⑥⑩①②③④⑦⑧⑨8、D9、氧气二氧化碳水蒸气红磷量不足水的量不足没有等到冷却到室温就读数课外拓展10、不一定如电灯泡也发光放热,但这是物理变化第三节1-5C A C B C6、d c a b e f7、H O C H2O CO28、先用止水夹夹紧橡皮导管,然后向长颈漏斗中加水,若水没有持续流下,则说明该装置气密性良好单元训练一、选择题B BC C C A C C B二、填空题10、绿色固体逐渐变为黑色,试管内壁出现小水珠,生成一种能使澄清石灰水变浑浊的气体;绿色固体逐渐消失冒气泡易分解能与盐酸反应绿色固体11、残流液腐蚀标签烫坏桌面试管炸裂12、物理性质化学变化物理性质化学变化物理性质化学性质化学变化13、①②③④⑥⑤⑦水蒸气液化时能放出大量热量水能与二氧化碳的反应生成碳酸三、简答题14、水既不聚成水滴也不成股流下15、不正确应该左物右码实际质量为9.5克16、量筒分流漏斗集气瓶第二章参考答案第一节性质活泼的氧气1.A2.C3.A4.B5.C6.D7.氧气氮气液氧8.(1)酒精灯、试管、导管、水槽、集气瓶、铁架台 (2)排水集气法向上排空法(3)接触药品,堵塞导管9. 都有氧气参与反应,都为氧化反应;都为放热反应;都为化合反应;都发光10.⑪过氧化钠+二氧化碳→碳酸钠+氧气⑫③不需加热除去CO211.应用:供呼吸,助燃隔绝:灭火,食物保鲜第二节奇妙的二氧化碳1.D2.D3.B4.D5.A6.③④②①⑤7.燃烧呼吸腐烂等等8.石灰水和空气中的二氧化碳反应生成了碳酸钙稀盐酸9.先做灯火实验10.⑪CO2 ⑫保护森林,减少CO2 ⑬不使用一次性筷子。
上教版(沪教版)九年级化学补充习题(上下册)参考答案

上教版(沪教版)九年级化学补充习题(上下册)参考答案上教版(沪教版)九年级化学补充习题(上下册)参考答案第一章第一节1-5C D D D B6、45.6吸烟的危害有:会引起肺癌和心血管疾病。
并且生活在自己周围的亲人有吸二手烟的风险课外拓展现象:白色固体逐渐减少,试管内壁出现小水珠,生成一种能使澄清石灰水变浑浊的气体,同时生成一种有刺激性气味的气体;碳酸氢铵固体发生了分解生成了水、二氧化碳和氨气7、略第二节1-6C C B D B B⑤⑥⑩①②③④⑦⑧⑨8、D9、氧气二氧化碳水蒸气红磷量不足水的量不足没有等到冷却到室温就读数课外拓展10、不一定如电灯泡也发光放热,但这是物理变化第三节1-5C A C B C6、d c a b e f7、H O C H2O CO28、先用止水夹夹紧橡皮导管,然后向长颈漏斗中加水,若水没有持续流下,则说明该装置气密性良好单元训练一、选择题B BC C C A C C B二、填空题10、绿色固体逐渐变为黑色,试管内壁出现小水珠,生成一种能使澄清石灰水变浑浊的气体;绿色固体逐渐消失冒气泡易分解能与盐酸反应绿色固体11、残流液腐蚀标签烫坏桌面试管炸裂12、物理性质化学变化物理性质化学变化物理性质化学性质化学变化13、①②③④⑥⑤⑦水蒸气液化时能放出大量热量水能与二氧化碳的反应生成碳酸三、简答题14、水既不聚成水滴也不成股流下15、不正确应该左物右码实际质量为9.5克16、量筒分流漏斗集气瓶第二章参考答案第一节性质活泼的氧气1.A 2.C 3.A 4.B 5.C 6.D7.氧气氮气液氧8.(1)酒精灯、试管、导管、水槽、集气瓶、铁架台 (2)排水集气法向上排空法(3)接触药品,堵塞导管9. 都有氧气参与反应,都为氧化反应;都为放热反应;都为化合反应;都发光10.⑴过氧化钠+二氧化碳→碳酸钠+氧气⑵③不需加热除去CO211.应用:供呼吸,助燃隔绝:灭火,食物保鲜第二节奇妙的二氧化碳1.D2.D3.B4.D5.A6.③④②①⑤7.燃烧呼吸腐烂等等8.石灰水和空气中的二氧化碳反应生成了碳酸钙稀盐酸9.先做灯火实验10.⑴CO2 ⑵保护森林,减少CO2 ⑶不使用一次性筷子。
沪教版九年级化学九年级下册全册学案及答案

物质在水中的分散课堂探究第一课时溶液的概念和特征点拨:(1)从微观角度看,溶液的形成过程是被溶解的物质以分子或离子的形式均匀分散到溶剂分子之中,因此,溶液具有均一、稳定的性质。
(2)均一性是指溶液中各部分的浓度和性质都相同。
稳定性是指外界条件不改变,溶液长时间放置不会分层,也不会析出固体。
外界条件是指温度(或压强)不改变,溶剂不蒸发。
由此可见,溶液的稳定性是相对而言的,如果外界条件发生改变,溶液也会发生改变。
【例】下列关于溶液的叙述,正确的是( )A.无色透明的液体一定是溶液B.溶液中各部分的性质均相同C.植物油分散到水中可以形成溶液D.溶液中只含有两种物质答题关键:对溶液概念全面细致的理解是解题的关键。
溶液不一定是无色的,如高锰酸钾溶液是紫色的,硫酸铜溶液是蓝色的;无色透明的液体也不一定是溶液,如蒸馏水等。
解析:溶液都是透明的,但是并不能说明溶液都是无色的,因此A错误。
溶液具有稳定性和均一性,这说明溶液各部分的性质和浓度等都是相同的,因此B正确。
植物油分散到水中是以小液滴的形式存在的,放置一段时间会分层,不具备溶液的特征,属于乳浊液,而不是溶液,故C错误。
将适量的食盐、蔗糖、硫酸铜等物质同时放入水中,它们都会溶解而形成溶液,由此可见溶液中至少含有两种物质,因此D错误。
答案:B第二课时物质溶解过程中的能量变化点拨:1.物质溶解在水中发生两个过程及热量变化扩散过程:溶质分子(或离子)向水中扩散的过程,是物理过程,吸收热量。
水合过程:溶质的分子(或离子)和水分子作用,生成水合分子(或水合离子),是化学过程,放出热量。
2.溶解时热量现象的解释降温:当扩散过程中吸收的热量大于水合过程放出的热量,表现为溶液的温度降低,如硝酸铵溶解时吸热。
升温:当扩散过程中吸收的热量小于水合过程放出的热量,表现为溶液的温度升高,如氢氧化钠固体溶解时放热。
温度改变不明显:当扩散过程中吸收的热量与水合过程放出的热量,没有明显的差别或者是差别不大时,溶解的热现象表现就不明显,如氯化钠的溶解。
九年级化学下册练习册答案

碱在生活和工业生产中也有着广泛的应用。例如,氢氧化钠用于制造肥皂、纸 张、合成纤维等;氢氧化钾用于制造钾肥、合成橡胶等;氨水用于制造化肥、 清洁剂、制冷剂等。
中和反应及其应用
中和反应
酸和碱作用生成盐和水的反应称为中和反应。例如,盐酸和氢氧化钠ห้องสมุดไป่ตู้应生成氯 化钠和水。
中和反应的应用
中和反应在生活和工业生产中有着广泛的应用。例如,在实验室中,可以用中和 反应来调节溶液的酸碱度;在医疗上,可以用中和反应来治疗胃酸过多等疾病; 在环保领域,可以用中和反应来处理酸性废水等。
学会药品的取用、加热、溶解、 过滤、蒸发等基本实验操作。
了解实验室安全规则,如防火、 防爆、防毒、防腐蚀等。
科学探究的方法与步骤
观察法
通过感官或借助仪器对实验现 象进行细致、全面的观察,记
录实验现象和数据。
实验法
根据实验目的和原理,设计实验方案 ,进行实验操作,观察实验现象,记 录实验数据,分析实验结果。
04 盐和化肥
盐的性质和用途
盐的性质
盐是一类化合物,通常由金属离子(或铵根离子)和酸根离子组成,如氯化钠(NaCl)、硫酸钙 (CaSO4)等。盐在水中能电离出自由移动的离子,具有导电性。
盐的用途
盐在生活和生产中有广泛应用。例如,食盐(NaCl)是烹饪中常用的调味品,也是人体必需的营养物质 之一;工业上,盐可以作为原料生产各种化工产品,如氯碱工业中的烧碱(NaOH)和氯气(Cl2)等。
物质的性质
物理性质
物质不需要发生化学变化就能表现出 来的性质。如颜色、状态、气味、密 度、硬度、熔点、沸点等。
化学性质
物质在化学变化中表现出来的性质。 如可燃性、氧化性、还原性、稳定性 等。
化学补充习题(9下)沪教版答案

第6章溶解现象第一节物质的溶解课内训练1.将下列物质分别加人足量水中,充分搅拌后能形成溶液的是( )。
A.味精B.面粉C.精制油D.石灰石2.下列是生活中常见的液体,其中不属于溶液的是( )。
.A.白醋B.牛奶C.消毒酒精D.蔗糖水3.对溶液的下列认识中,正确的是( )。
A.一种或几种物质分散到另一种物质里,形成的均一、稳定的混合物叫做溶液B.溶液都是无色透明的、均一的、稳定的混合物C.植物油溶入汽油中可形成不稳定的乳浊液D.一杯完全溶解的糖水放置一段时间后,溶液的上半部分一定比下半部分甜4.下列各项措施中,不属于乳化在日常生活或生产中的应用的是( )。
A.用洗洁精洗去碗筷上残留的油污B.用肥皂洗去衣服上的油污C.用洗衣粉洗去棉织物上的油污D.用食醋清除热水瓶中的水垢5.下列各种生活应用巾,不属于溶液的应用的是( )。
A.医院里使用消毒酒精对皮肤、体温计等消毒B.用熟石灰粉等物质配制粉刷内墙的涂料C.长跑运动员赛跑途中服用葡萄糖口服液来补充能量D.夏秋季节,如果皮肤上生了疖子,可用碘酒涂擦患处6.严冬时节,我国北方某些城市曾用食盐融雪,造成土壤中含盐量偏高,使路旁树木死亡。
目前专家已研制出一种新型融雪剂,既能融化冰雪,又能起施肥养护树木的作用。
具有上述作用的新型融雪剂含有的成分可能是( )。
A.氯化钠、氯化钙B.氯化钠、氯化镁C.氯化钠、醋酸钙镁D.尿素、硝酸钙、硝酸镁7.从一杯高锰酸钾溶液的上层取出少量液体,测得它的密度是“ag·cm-3,再从高锰酸钾溶液的下层取出少量液体.经测定它的密度是_____g·cm-3。
通过这一实验,你对溶液的认识是_____。
8.金属能导电,是因为____;某些物质的水溶液如____、____也能导电,是因为____。
而____、_ ___等不能导电,是因为_________。
9.小英在做饭时,发现很多因素都能影响食盐在水中溶解的速率。
(1)从你能想到的可能影响食盐在水中溶解速率的因素中写出两项,并预测该因素对食盐溶解速率的影响:因素①____________,你的预测____________;因素②____________,你的预测__________。
初三化学练习册答案(上海).doc

初三化学练习册答案(上海)The first semester of ninth gradechemistryChemistry makes the world a better place(a)(1)make a dazzling white powder(2)clarify the lime water turbidity(3)it produces a lot of bubbles2.B. Magnesium belt combustion produces new chemicals that are chemical changes, and physical changes may also have a glowing g 1 owC, C, C, C, C, C, C, CEvery one of them has a good time(1)there was no chemical change. Because the water in the sea is vaporized, it causes the salt to be precipitated out.(2)there was no chemical change. Because a candle melts and vaporizes does not produce a new substance.White and white solid white powder, white powder white oxide powderB 2.3. B(1)a tube holder will burn the test tube(2)it is not obvious that the experiment of boiling water in a beaker is too long(3)the glue head dropper tube is inserted into the test tube to contaminate the pipe5. B6. A.It is difficult to clarify the calcium carbonate of calcium carbonateCalcium carbonate produces a large amount of carbon dioxide and carbon dioxide sticks out9. B10.The BCGarbage classification nameConcrete garbage (filling sequence number) Organic waste4 5 9 10metalplasticharmfulrecycled1 7June 1182,3,12. A littleEnter the chemistry lab(a)The solution turns red and the solution is red and colorlessBlue and blue precipitation disappearsReignite oxygen with a Mars bar9. BDThe formation and dissolution of the gas generation precipitation by the change of colorThe experimental results of experimental experiments in experimental products were concluded(2)(1)tube beaker with a round bottom flask cone(2)a, b, d, b, d2. C3.AB(1)the alcohol on the wick is not easily lighted and wasted(2)the liquid will overflow(3)a large amount of heat will explode at the bottom of the cylinder(a) the cork is on the table with the cork on the table (2) the label should be held in the palm of the hand(b) (1) the test tube should be tilted when the test tube is not tilted when heated(2) the liquid in the test tube should be less than a third of the test tube6. D7. A littlePurification of the substance1 〜8 C BC AD C, C, C, C, C, C, C, C, d, C, C, d, C, CThe drainage causes the liquid to accelerate and dissolve in a small amount of liquidSlightly 10.(1)the volume reading generates an error(2)the liquid will flow out of the gap between the filter paper and the funnel(3)the solid after the drying is easy to spill13. BDThe world,s most common chemical language(2) H (4) Na (5) Cu (6) AlCD 2.3.The element nameheliumphosphoruspotassiumsymbolCNSiWith recentThe Ca5.BD6.AD7.The name of the nitrogenCarbon monoxide hydrogen Chemical formula H20MgMgO style Material categoryelemental compound compoundelemental7.(1) the calcium(2)iron(3)the sulfur⑷P8. D9.(1) Mg 02 MgO style (2) C02 H20(1)sodium chloride(2)NaOH(3)Cu (OH) 2 CuS04 H20(4)CaO H20This chapter test5 C, C, D, C, A6 to 10, B, D, C, A, B11.The name of thenitrogensodiumbariumsymbols.With recentPMetal or non-metallic elements Nonmetallie elements Nonmetallie elementsMetal elementsMetal elementsNonmetallie elementsMetal elements12.The name of theoxygenmagnesiaCarbon dioxideChemical formulaCOH20FeSingle matter or compoundcompound compoundcompound elementalcompound13. A littleThe second is the last(1)carbon + oxygen fuels carbon dioxideC C02 + 02 lit(2)carbon dioxide and carbon monoxideThe C02 + C high temperature CO16.(1)take a small amount of water and let the filter paper stick to the inner wall of the funnel and the filter paper should be below the edge of the funnel(2)preheat and heat upThere is no vertical drop in the test tube, which will cause the liquid to drop out of the tube by one third of the volume of the tube, and the liquid will overflow when heated18.Take quality such as diamond and graphite after fully burning in oxygen are only a product of carbon dioxide, and carbon dioxideare equal, the quality of the diamond and graphite is the elemental carbon19. A littleThe vast expanse of the atmosphereThe air that people live on(a)1.10 * 1. 76 nf * 5 g 二88 g2. D3.ABF CDE4.Don,t agree. If red phosphorus is not deficient, it cannot completely consume the oxygen in response.A chemical that is stable in helium gas krypton is able to emit a different color when it is energized(1) it will clarify the lime-water exposure in the air, and a few days later the lime-water turbidity will show that there is carbon dioxide in the air (2) put a drink in the freezer, put up in the air in an hour, bottles of outside wall will have small water droplets, that is water vapor condensation in the air 7. ADE(2)1 〜3 CBB0 Si Fe Al Na calcium hydrogen potassium magnesium copper Cobalt 5.02 makes up two oxygen atoms03 makes up three oxygens(1)03, 16 * 3 = 48(2)24 + 16 = 40 MgO style(3)N2, 14 * 2 = 28(4)CaC03 40 + 12 + 16 * 3 = 1002.2 magic oxygen(a)1.You need oxygenYou need to get rid of oxygenHelp breathingPut out the fireFuel combustionRust preventionThe strips of wood will be ignited into nitrogen and oxygen, the wood in the oxygen will burn more, and the wood in nitrogen will go out3. D4. D5. A.6. BThe reaction of matter in pure oxygen is more intense than in airThe experimental stepsThe phenomenon of conclusionPut the lighted sticks in three gasesOne bottle of wood went out slowly and one of the wooden bars went outThe slow quenching of the air is that the oxygen is extinguished by nitrogen(2)1. A.B 2.3. D4.Name of the material Chemical formulaKC1O3Mn0202H202KC1Material category compoundoxideelementaloxideoxidecompoundType the amount122.58732341874. 54. A little5.(1) hydrogen peroxide under certain conditions of oxygen generated in the reaction (2) the heating can increase the reaction rate of hydrogen peroxide to produce oxygen (3) manganese dioxide can speed up the reaction of hydrogen peroxideThe conservation of mass in chemical changes(а)(1)hydrogen and oxygen(2)there are 2 hydrogens and 1 oxygen(3)2:1⑷"⑸18(б)88. 9%2.(1) NH4HC03(2)17. 7%(3)20.1 percent is more than fake advertisingS02 CuO Na20 NaCl Mg (Oil) 2 CuS044.(1) the MgO style⑵Ne(3)the A1C135.(1) 02⑵Cu(3)the CuO(4)H206.(2)1. 6. 02 * 10 " 23 6.02 * 10 " 3 * 6.02 * 10 " 5 23 242.Molecular weight g/Moorish 28 grams/Moore 56 g 1. 204 * 10243.2:6:1 guidance: 16 184 4 * 6. 02 * 10 " 234.(1) 4 * 6. 02 * 10 " 23 = 2.408 * 10 " 242223 (2) 0. 05 * 6.02 * 10 " = 3.01 * 10(1)0.2 * 98 = 19. 6 g(2)5 * 27 = 135 g6.(1) 88/44 = 2 mol(2)4/40 = 0. 1 mol7.16/80 = 0. 2 moles (32 + 32)= 12. 8 grains8. B9. A.Slightly 10.(3)1. 0. 96 0. 03 1.806 * 10 " 22Carbon, hydrogen and oxygen3. B(3)the mass conservation of the material before and after the reaction(4)the number of atoms before and after the reaction is the same as two magnesium atoms and two atoms of oxygen(5)for every 2 moles of magnesium, you need 1 mole of oxygen, and you produce 2 moles of magnesium oxide(1)1, 2, 1, 2(2) 1 2 3(3) 2 1 2(1)2C0 + 02 igniting 2C02(2) C + H20 hot CO + H2(3)Cu2 (OH) 2C03 heats up 2CuO + H20 + C02Let's say we need oxygen X moles to produce MgO Y moles2Mg + 02 to ignite 2MgO2/2 = 1 / XX = 1 mol,1/1=2/ YY = 2 mol,Answer: need 02 1 mole, produce MgO 2 molThis chapter test1to 6 times the square root of the square root of that15 ABABD CADDBoth hydrogen and oxygen atoms consist of two hydrogen atoms and one oxygen atom, and hydrogen peroxide has two oxygen atoms and two hydrogen atoms3 162 17.18. 1:2:1 60 1.204 * 10 " 24Blue violet S + 02 ignited S02 0. 05 0. 05Liquid - 195.8 neon, helium(1)test-tube alcohol lamp iron stand(2)2KMnO4 heating K2MnO4 + Mn02 + 02(3)the gas that C begins to discharge cannot be collected, etc., which produces a large number of continuous bubbles to be collected, and when there is a lot of bubbles in the gas cylinder, stop collecting(4)2KC103 heating (Mn02) 302 up + 2KC1(5)high quality such as potassium chlorate and manganese oxidewere taken, no longer reduces fully heated to solid, and weighing the quality of the remaining solid, compared with the reaction before quality, the difference is the difference of oxygen22. Take four cylinders, respectively in 1/2 volume of water, two-thirds of the volume of water, 4/5 of the volume of water, collect the reoccupy drainage method, the required gas volume can be subjectStep 3 into the solution world3. 1 the water(a)1 〜4 BBDCVolatilization, precipitation, filtration, adsorption alum chlorine gas6 〜9 AABDH2 02 2 1 2:1Heat capacity — the temperature difference between temperature and temperatureAnomalous expansion - ice floats on the surface of the waterAssociative dispersionCaO + H20 - Ca (OH) 2I.Colorless, tasteless, the density of liquid, 1 * 10 3 kg/cm3, freezing point 0 °C ice, steam and poor conductor is 100 °C2〜8 CDDCDBCalcium oxide gradually disappeared from phenolphthalein and calcium hydroxide as an alkaline solution10. 5. 1 mlII.(1) 6 mol,(2) 100. 8 g3.2 solution(a)1 〜5 CCBDB6.BDAdd sodium nitrate to cool the evaporation water8.Take two beakers respectively each 100 g to 100 g cool water 80 °C hot water, add solid ammonium chloride respectively, until saturated ammonium chloride dissolved grams1 7 DDBDDBC8.(1) 10 °C 〜20 °C(2)18. 5, 185. 59. D二A11. D12. B13.AD BC14.The pressure(3)1 〜4 BBCB5. 5. 5. 89. 8 meter, drip tube, beaker, glass rod(1)3, 76 oxygen(2)560, 11.27.3940 g31. 61 g / 100 grams of water9.26. 5%10.(1) 15 g(2) 20%The acid alkalinity of 3. 3 solutionAlkali acidThe PH test paper purple litmus reagent colorless phenolphthalein3〜10 B D A D A, B, C DCalcium oxide releases a large amount of hot, colorless phenolphthphthalein, which is alkaline(1)apple red(2)the samp(1)red flowers, roses, daisies(2)the greenThe potassium carbonate is alkaline b because the PH paper is directly dipped in the solution and the purple litmus iscontaminatedThis chapter test I〜5 DABBA6 〜10 ABACBII15 CACAA16.A,17.(1) A(2)the tl(3) C < < A18.solutionThe solute solvent Hydrochloric acid water iodinealcohol alcoholwaterSodium hydroxidewaterCalcium hydroxidewatercarbonatewaterCooling, solute and evaporative solubility of calcium hydroxide decreases with the increase of temperatureA man is a man of his ownCaO + H20 - Ca (OH) 2The temperature of summer is high, the water evaporates more, the salt solution of sodium chloride is changed less at high temperature, the salt of precipitation is moreIn the winter, the temperature is low, the water evaporates less, the pure alkali is in the low temperature the solubility changes big, the pure alkali that precipitates outSummer is high, low pressure,The oxygen dissolves and the fish surface as a result of insufficient oxygen24. A little25.(1) CH40(2)12. 5Fuel and its combustionBurning and extinguishing1 〜4 CBADExposure to air is great(1)isolating fuel from oxygen(2)the temperature drops below the f1ammab1e pointThe heat capacity is large enough to cool down. Water vapor insulates fuel from oxygenThe density is greater than the air, which insulates the fuel from the oxygen, and does not burnCoal and oil gasCoke tar in coke ovenPrevent fire from coming down and ignite the alcohol in the lamp holderPass the oxygen into the water4.2 carbon1 〜5 ACDCC6 〜10 DBBBC11. B12.materialThe nature of theuseIt is not very hot and not conductiveAs a shielding gasAt room temperature, the chemical properties are very lively Help burn hydrogenThe ignition density is less than the airThe balloonC + 02 light C02(1)remove air from the device to prevent explosion(2)the copper that prevents the formation of the formation is reoxidized(3)the carbon dioxide must be ignited2C0 + 02 igniting 2C02Clarify the level of fluid in the lime-water in the test tubeThe CaC03 high temperature CaO + C02(2) Ca (OH) 2(1)Cu CuO C02 CaC03(2) 2 cu + 02 heats 2CuOCuO + CO heats the Cu + C02 arrowC02 + Ca (OH) 2 ~ CaC03The laboratory process of 4. 3 carbon dioxide1 〜4 CCBCThe sink collects cylinders(1)CaC03 + 2HC1 一CaC12 + H20 + C02 arrow(2)the eqp generator(3)the upward exhaust method⑷C(1)spherical funnel spherical and semi-spherical vessel air catheter(2)the reactants are solids and liquids without heating(3)the reaction can be controlled and stopped4.4 chemical fuel1 〜6 CCDCDB7. 16 g/mo1, 3 mol, 3 * 6. 02 * 10 23 June 132 Carbon, hydrogen and oxygenCarbon and hydrogen gas(1)carbon monoxide nitric oxide(2)2C0 + 02 igniting 2C02(3)less cars and more busesThis chapter test1 〜5 DCDCD6 〜10 CDAAC(1)CO C02 S02 H2(2)graphite saltThe C02 is reforestationC + H20 heating CO arrow + H2 arrow14. A little(1)by burning copper oxide CO + CuO high temperature Cu + C02(2)the sodium hydroxide solution (1) conforming to the requirements of the rev generator(2) the reactants are readily available and the price is low(1)the requirements are too high(2)the reaction is too fast to collect(3)carbon dioxide is not pure(4)if the burning does not produce carbon monoxide18. (1) A(2)0. 04 0. 04(3) 4.24 69.71 percent(1)an iron stand tube with an alcohol lamp(2)black solid red 2CuO + C heating 2Cu + C02 arrow CuO(3)the purple litmus is red acid(4)the purple litmus turns into purple and H2CO3 heats H20 + C02 Slightly 20.(cute answer...)。