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2015中考化学专题复习课件第20课时 物质的检验、提纯和推断

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2015中考化学专题复习 中考化学复习第 课时20物质的检验与 提纯课件ppt 化学专题二十 化学总复习课件 物质的检验与推断
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To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well, carry out well. Reform is still the focus of this year's “two sessions.“ Our party should continue to deepen the reform in an all-round way and unswervingly go on, and promote the modernization of the national governance system and governance ability, which requires the Party to improve its governing ability and efficiency and raise its work level. The anti-corruption issue is also the focus of more efforts, because in the past year, our country has made great progress on the road of fighting corruption and promoting integrity, and has cracked down on many corrupt officials. To those who do not wholeheartedly for the welfare of the people of the government personnel heavy blow and warning. And it is precisely because of the vigorous administration of the party and the state that some public funds eat and drink. Corruption and other phenomena have mostly disappeared, so this year's deep reform 第20课时 物质的检验、 提纯和推断 考 点 聚 焦 考 点 聚 焦 归 类 示 例归 类 示 例 To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well, carry out well. Reform is still the focus of this year's “two sessions.“ Our party should continue to deepen the reform in an all-round way and unswervingly go on, and promote the modernization of the national governance system and governance ability, which requires the Party to improve its governing ability and efficiency and raise its work level. The anti-corruption issue is also the focus of more efforts, because in the past year, our country has made great progress on the road of fighting corruption and promoting integrity, and has cracked down on many corrupt officials. To those who do not wholeheartedly for the welfare of the people of the government personnel heavy blow and warning. And it is precisely because of the vigorous administration of the party and the state that some public funds eat and drink. Corruption and other phenomena have mostly disappeared, so this year's deep reform 第20课时┃ 物质的检验、提纯和推断 考 点 聚 焦 考点聚焦 归类示例 考点1 物质的检验和鉴别 1.检验:指根据物质特有的性质及反应现象对该物质(或离子)进行确认,其对象一般是 ________种物质或________种离子。 2.鉴别:指根据各种物质在性质上的不同及反应现象的不同对几种物质进行区分,其对 象一般是________种物质。在试剂的选择上有自选试剂、指定试剂或不加其他试剂之分。 一 一 多 To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well, carry out well. Reform is still the focus of this year's “two sessions.“ Our party should continue to deepen the reform in an all-round way and unswervingly go on, and promote the modernization of the national governance system and governance ability, which requires the Party to improve its governing ability and efficiency and raise its work level. The anti-corruption issue is also the focus of more efforts, because in the past year, our country has made great progress on the road of fighting corruption and promoting integrity, and has cracked down on many corrupt officials. To those who do not wholeheartedly for the welfare of the people of the government personnel heavy blow and warning. And it is precisely because of the vigorous administration of the party and the state that some public funds eat and drink. Corruption and other phenomena have mostly disappeared, so this year's deep reform 考点聚焦 归类示例 3.常见见物质质或离子的检验检验 物质质或 离子 检验检验 方法现现象 O2(1)伸入带带火星的木条 (2)伸入燃着的木条 (1)带带火星的木条________ (2)木条________ H2点燃,在火焰上分别别罩上干燥 的冷烧烧杯和沾有澄清石灰水的 烧烧杯 产产生________ 色火焰,烧烧杯 壁上有________,石灰水 ________ CO2通入澄清的石灰水中石灰水________ CO点燃,在火焰上分别别罩上干燥 的冷烧烧杯和沾有澄清石灰水的 烧烧杯 产产生________色火焰,烧烧杯 壁上 ________,石灰水 ________ H+(1)滴加紫色石蕊溶液 (2)加入较较活泼泼的金属 (3)用pH试纸检测试纸检测 (1)紫色溶液变变________ (2)产产生________ (3)pH_________7 复燃 燃烧更旺 淡蓝 水珠 不浑浊 变浑浊 蓝 无水珠 变浑浊 红 气泡 < 第20课时┃ 物质的检验、提纯和推断 To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well, carry out well. Reform is still the focus of this year's “two sessions.“ Our party should continue to deepen the reform in an all-round way and unswervingly go on, and promote the modernization of the national governance system and governance ability, which requires the Party to improve its governing ability and efficiency and raise its work level. The anti-corruption issue is also the focus of more efforts, because in the past year, our country has made great progress on the road of fighting corruption and promoting integrity, and has cracked down on many corrupt officials. To those who do not wholeheartedly for the welfare of the people of the government personnel heavy blow and warning. And it is precisely because of the vigorous administration of the party and the state that some public funds eat and drink. Corruption and other phenomena have mostly disappeared, so this year's deep reform 考点聚焦 归类示例 物质质或 离子 检验检验 方法现现象 OH-(1)滴加紫色石蕊溶液 (2)滴加无色酚酞酞溶液 (3)用pH试纸检测试纸检测 (1)紫色溶液变变________ (2)无色溶液变变________ (3)pH__________7 Cl-向其水溶液中滴加硝酸银银溶液 和稀硝酸 产产生____________且不溶于稀 硝酸 SO向其水溶液中滴加硝酸钡钡溶液 和稀硝酸 产产生____________且不溶于稀 硝酸 CO滴加稀盐盐酸,并将产产生的气体 通入澄清石灰水中 滴加盐盐酸时产时产 生________, 澄清石灰水__________ NH加入熟石灰(水溶液中加氢氢氧化 钠钠并加热热) 产产生刺鼻的氨臭味 ①对物质进行检验或鉴别时,要先取样再实验。 ②在方法上,要简单易行且现象明显。 蓝 红 > 白色沉淀 白色沉淀 气泡 变浑浊 第20课时┃ 物质的检验、提纯和推断 To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well, carry out well. Reform is still the focus of this year's “two sessions.“ Our party should continue to deepen the reform in an all-round way and unswervingly go on, and promote the modernization of the national governance system and governance ability, which requires the Party to improve its governing ability and efficiency and raise its work level. The anti-corruption issue is also the focus of more efforts, because in the past year, our country has made great progress on the road of fighting corruption and promoting integrity, and has cracked down on many corrupt officials. To those who do not wholeheartedly for the welfare of the people of the government personnel heavy blow and warning. And it is precisely because of the vigorous administration of the party and the state that some public funds eat and drink. Corruption and other phenomena have mostly disappeared, so this year's deep reform 考点2 物质的提纯 一般是利用杂质杂质 的某些性质质将其转转化成气体或沉淀或需要保留的物质质。例如,除去氢氢 氧化钠钠中含有的碳酸钠钠,方法是:先加入适量的水将物质质溶解,再滴加____________溶液 至不再产产生沉淀,过滤过滤 ,蒸发滤发滤 液即可得到氢氢氧化钠钠固体。 考点聚焦 归类示例 ①进行提纯时,不能引入新的杂质,也不能将需要保留的物质消耗掉。 ②在操作上,要简单易行。 氢氧化钙 第20课时┃ 物质的检验、提纯和推断 To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well, carry out well. Reform is still the focus of this year's “two sessions.“ Our party should continue to deepen the reform in an all-round way and unswervingly go on, and promote the modernization of the national governance system and governance ability, which requires the Party to improve its governing ability and efficiency and raise its work level. The anti-corruption issue is also the focus of more efforts, because in the past year, our country has made great progress on the road of fighting corruption and promoting integrity, and has cracked down on many corrupt officials. To those who do not wholeheartedly for the welfare of the people of the government personnel heavy blow and warning. And it is precisely because of the vigorous administration of the party and the state that some public funds eat and drink. Corruption and other phenomena have mostly disappeared, so this year's deep reform 考点3 物质的推断 考点聚焦 归类示例 根据提供的信息,结结合物质质的组组成或性质质或反应现应现 象的特点推算出被检验检验 的对对象中一 定有什么物质质,一定没有什么物质质,可能有什么物质质。 对物质进行推断时,需要掌握各种物质特殊的性质或特殊的实验现象。 第20课时┃ 物质的检验、提纯和推断 To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well, carry out well. Reform is still the focus of this year's “two sessions.“ Our party should continue to deepen the reform in an all-round way and unswervingly go on, and promote the modernization of the national governance system and governance ability, which requires the Party to improve its governing ability and efficiency and raise its work level. The anti-corruption issue is also the focus of more efforts, because in the past year, our country has made great progress on the road of fighting corruption and promoting integrity, and has cracked down on many corrupt officials. To those who do not wholeheartedly for the welfare of the people of the government personnel heavy blow and warning. And it is precisely because of the vigorous administration of the party and the state that some public funds eat and drink. Corruption and other phenomena have mostly disappeared, so this year's deep reform 例1[2014·重庆]某矿矿物质质水标签标签 的部分内容如图图20-1所示,若要检验检验 其中含MgSO4 ,需要的试剂试剂 之一是( ) A.稀硫酸 B.AgNO3溶液 C.BaCl2溶液 D.金属镁镁 类型一 物质的检验和鉴别 归 类 示 例 考点聚焦 归类示例 第20课时┃ 物质的检验、提纯和推断 C To study and implement the spirit of the two sessions is the primary political task of the educators in 2018. Through the study of the spirit of the two sessions, I have a profound awareness that the key to the prosperity and development of the country lies in the Party, and the key to the all-round rejuvenation of the nation lies in education. The two sessions were held on March 3, and the two sessions have attracted much attention. The Congress of democracy, unity, harmony, and pragmatism has determined the work of economic and social development in 2018, which is of great significance for further promoting scientific development, promoting social harmony, and continuously opening up a new situation for the cause of socialism with Chinese characteristics. At present, the most important political task before us is to concentrate on the two Will spirit study well,
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