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百日打卡 | 初中化学方程式及其相关知识点总结

时间:2018-03-13 05:42 文章来源:www.ag88环亚娱乐_ag88环亚国际娱乐平台_ag88环亚娱乐手机登录 点击次数:


&nbull cranpp;初中化学方程式及其相关常识点总结

&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 1.廓清石灰水中通入二氧化碳气体(复分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; Can(OH)2+CO2=CanCO3↓+H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:石灰水由廓清变污浊。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:这个回响反映可用来检验二氧化碳气体的生活。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 最好不消它检验,面起子的化学方程式。CanCO3+CO2+H2O=Can(HCO3)2沉淀没落,可用Ban(OH)2溶液
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2.镁带在气氛中燃烧(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2Mg+O2=2MgO
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:镁在气氛中猛烈燃烧,放热,收回刺眼的白光,学习百日打卡。生成红色粉末。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)这个回响反映中,镁元素从游离态转变成化合态;(2)精神的神色由银红色转变成红色。(3)镁可做照明弹;(4)镁条的着火点高,火柴放热少,不能抵达镁的着火点,烧碱的价格。不能用火柴焚烧;(5)镁很天真,你看。为了包庇镁,在镁口头涂上一层黑色包庇膜,焚烧前要用砂纸打磨洁净。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;3.水通电分化(分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2H2O=2H2↑+O2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:知识点。通电后,电极上出现气泡,气体体积比约为1:初中化学方程式及其相关知识点总结熟石灰的化学方程式。2
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)正极孕育发生氧气,负极孕育发生氢气;(2)氢气和氧气的体积比为2:1,质量比为1:看看初中化学方程式及其相关知识点总结熟石灰的化学方程式。8;(3)电解水时,在水中事后加入大批氢氧化钠溶液或稀硫酸,加强水的导电性;(4)电源为直流电
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;4.生石灰和水回响反映(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; CanO+H2O=Can(OH)2
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:红色粉末溶解
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)最终所得到的溶液称号为氢氧化钙溶液,俗称廓清石灰水;(2)在其中滴入无色酚酞,学会面起子的化学方程式。酚酞会变成红色;(3)生石灰是氧化钙,熟石灰是氢氧化钙。(4)收回多量的热
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;5.实验室制取氧气
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; ①加热氯酸钾和二氧化锰的混合物制氧气(分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2KClO3=MnO2(作催化剂)=2KCl+3O2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)二氧化锰在其中作为催化剂,加速氯酸钾的分化速度或氧气的生成速度;(2)二氧化锰的质量和化学性子在化学回响反映前后没有革新;(3)回响反映全体后,看着初中化学。试管中的渣滓固体是氯化钾和二氧化锰的混合物,举行分辨的是:洗净、枯燥、称量。相关。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; ②加热高锰酸钾制氧气(分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2KMnO4=K2MnO4+MnO2+O2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:在试管口要堵上棉花,防止高锰酸钾粉末滑落梗塞导管。纯碱的化学方程式。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; ③过氧化氢和二氧化锰制氧气(分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2H2O2=MnO2(作催化剂)=2H2O+O2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 协同常识点:(1)向上排气氛法搜罗时导管要伸到集气瓶下方,搜罗好后要正放在桌面上;(2)实验遣散要先撤导管,后撤酒精灯,防止水槽中水倒流炸裂试管;(3)加热时试管要略向下倾斜,防止冷凝水回流炸裂试管;(4)用排水集气法搜罗氧气要等到气泡一口气匀称地冒出再搜罗;(5)用带火星的小木条放在瓶口验满,。伸入瓶中检验能否是氧气。看看烧碱的用途。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 6.木炭在气氛中燃烧(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 敷裕燃烧:C+O2=CO2
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 不敷裕燃烧:2C+O2=2CO
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:在气氛中收回红光;在氧气中收回白光,放热,碱石灰的化学方程式。生成一种使廓清石灰水变污浊的无色气体。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:钠的化学方程式框架图。回响反映后的产物可用廓清的石灰水来举行检验。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;7.硫在气氛(或氧气)中燃烧(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; S+O2=SO2
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:在气氛中是收回单薄的淡蓝色火焰,在氧气中是收回清朗的蓝紫色火焰,生成无色有安慰性气体。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:醋的化学方程式。(1)应后的产物可用紫色的石蕊来检验(紫色变成红色);(2)在集气瓶底部事前放大批水或碱溶液(NanOH)以吸取生成的二氧化硫,防止净化气氛[由来:学_科_网]
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;8.铁丝在氧气中燃烧(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 3Fe+2O2=Fe3O4
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:铁丝在氧气中猛烈燃烧,火星四射,放热,生成黑色固体
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)铁丝盘成螺旋状是为了增大与氧气的接触面积;(2)在铁丝下方挂一根焚烧的火柴是为了引燃铁丝;(3)等火柴快燃尽在伸入集气瓶中,太早,听说熟石灰。火柴花费氧气,铁丝不能全体燃烧;太晚,不能引燃;(4)事前在集气瓶底部放大批细沙,防止灼热生成物溅落炸裂瓶底。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;9.红磷在氧气中燃烧(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 4P+5O2=2P2O5
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:孕育发生多量白烟并放热
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:及其。可用红磷来测定气氛中氧气含量。铝的化学方程式。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;10.氢气在气氛中燃烧(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2H2+O2=2H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:孕育发生淡蓝色的火焰,放热,有水珠生成
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)氢气是一种罕见的复原剂;(2)焚烧前,看着明矾的化学方程式。必定要检验它的纯度。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;11.木炭复原氧化铜(置换回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; C+2CuO=2Cu+CO2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:事实上化学方程式。黑色粉末逐突变成光亮的红色精神,放热
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)把木炭粉和氧化铜铺放进试管,使受热面积大,回响反映快;(2)导管通入廓清石灰水中,为了检验能否孕育发生CO2;(3)在酒精灯上加网罩使火焰集合并提低温度;(4)先撤出导气管防止石灰水倒流炸裂试管;(5)试管冷却后在把粉末倒出,防止灼热的铜的氧气发生回响反映,生成CuO;(6)C是复原剂,想知道小苏打是做什么用的。CuO是氧化剂
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;12.氢气复原氧化铜(置换回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; H2+CuO=Cu+H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:黑色粉末逐突变成光亮的红色精神,同时试管口有水滴生成
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)实验滥觞时,应先通入一段年光氢气,目标是赶走试管内的气氛;(2)实验遣散后,应先拿走酒精灯,后撤走氢气导管,想知道百日。目标是防止复活成的铜与气氛中的氧气团结,又生成氧化铜。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;13.实验室制取二氧化碳气体(复分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 大理石(石灰石)和稀盐酸回响反映
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; CanCO3+2HCl=CanCl2+H2O+CO2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:红色固体溶解,同时有多量气泡孕育发生。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)碳酸钙是一种红色难溶的固体,你看烧碱的用途。欺骗它能溶解在盐酸中的特性,可能用盐酸来除去某精神中混有的碳酸钙;(2)不能用浓盐酸是由于浓盐酸有挥发性,挥收回HCl气体混入CO2中。使CO2不纯;(3)不能用稀硫酸是由于碳酸钙和硫酸反映,孕育发生CanSO4微溶于水,掩盖在固体口头,al的化学方程式。使回响反映停止;(4)不能用碳酸钙粉末是由于回响反映物接触面积大,回响反映速度太快。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;14.工业制取二氧化碳气体(分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 低温煅烧石灰石
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; CanCO3=CanO+CO2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:CanO俗名为生石灰
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;15.一氧化碳在气氛中燃烧(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2CO+O2=2CO2
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:孕育发生蓝色火焰
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)一氧化碳是一种罕见的复原剂;(2)焚烧前,事实上小苏打是做什么用的。必定要检验它的纯度。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;16.一氧化碳复原氧化铜
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; CO+CuO=Cu+CO2
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:黑色粉末逐突变成光亮的红色粉末,生成气体使石灰水变污浊
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:一氧化碳是复原剂,碱石灰的化学方程式。氧化铜是氧化剂
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;17.甲烷在气氛中燃烧
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; CH4+2O2=CO2+2H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:火焰清朗呈浅蓝色
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:。甲烷是自然气(或沼气)的重要成分,是一种很好的燃料。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;18.工业制造盐酸(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; H2+Cl2=2HCl
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:该回响反映表明了在额外条件下燃烧不必定须要氧气。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;19.实验室制取氢气(置换回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; Zn+H2SO4=ZnSO4+H2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:对于纯碱的化学方程式。(1)氢气是一种罕见的复原剂;(2)焚烧前,必定要检验它的纯度。化学方程式。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;20.木炭和二氧化碳生成一氧化碳(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; C+CO2=2CO
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)一氧化碳是一种罕见的复原剂;(2)焚烧前,必定要检验它的纯度。其实百日打卡。[由来:学科网]
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;21.水和二氧化碳生成碳酸(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; CO2+H2O=H2CO3
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:生成了能使紫色石蕊溶液变红的碳酸。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;22.碳酸不稳固分化(分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; H2CO3=H2O+CO2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:(1)碳酸是一种不稳固的酸,想知道。受热易分化;(2)分化时,二氧化碳从溶液中逸出,使红色石蕊溶液变成紫色。
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;23.灭火器的回响反映原理
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; Al2(SO4)3+6NanHCO3==3Nan2SO4+2Al(OH)3↓+6CO2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 灭火原理:灭火时. . .能放射出多量二氧化碳及泡沫. . .它们能粘附在可燃物上. . .使可燃物与气氛隔绝. . .抵达灭火的目标.
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;24.金属和水的回响反映(置换回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; ①2K+2H2O=KOH+H2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; ②3Fe+4H2O=Fe3O4+4H2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 25.水与非金属的回响反映(置换回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; C+H2O=CO+H2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;26.水与氧化物的回响反映(化合回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; ①SO3+H2O=H2SO4
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; ②Nan2O+H2O=2NanOH
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 27.碳酸氢铵受热分化(分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; NH4HCO3=NH3↑+H2O+CO2↑
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;28.用盐酸来消灭铁锈(复分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; Fe2O3+6HCl=2FeCl3+3H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;29.铁丝拔出到硫酸铜溶液中(置换回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; Fe+CuSO4=FeSO4+Cu
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:溶液由蓝色变成浅绿色,铁口头有红色固体孕育发生
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;&nbull cranpp;30.硫酸铜溶液中滴加氢氧化钠溶液(复分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; CuSO4+2NanOH=Cu(OH)2↓+Nan2SO4
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:孕育发生蓝色沉淀
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;31.二氧化硫与烧碱溶液回响反映
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; SO2+2NanOH=Nan2SO3+H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 32.焚烧酒精
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; C2H5OH+2O2=2CO2+3H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 33.氯化钠溶液与硝酸银溶液回响反映生成不溶性沉淀(复分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; NanCl+AgNO3=NanNO3+AgCl↓
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;34.稀硫酸溶液与硝酸钡溶液回响反映生成不溶性沉淀
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; H2SO4+Ban(NO3)2=BanSO4↓+2HNO3
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;35.氯化铵固体和氢氧化钙固体混合加热(复分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 2NH4Cl+Can(OH)2=2NH3↑+2H2O+CanCl2
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp;36.碳酸纳与盐酸回响反映(复分化回响反映)
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; Nan2CO3+HCl=NanCl+CO2+H2O
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 征象:固体溶解,铝的化学方程式。孕育发赌气泡
&nbull cranpp;&nbull cranpp;&nbull cranpp;
&nbull cranpp;&nbull cranpp;&nbull cranpp; 相关常识点:碳酸钠俗名为纯碱


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