初中化学常考化学方程式
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初中化学常考化学方程式★铁跟硫酸铜溶液反应(现代湿法冶金的先驱):
Fe+CuSO4==Cu+FeSO4(不用铁桶配波尔多液的原因)
★实验室制氢气:Zn+H2SO4==ZnSO4+H2↑
现象:锌片逐渐减少,有气泡生成。(实验室制氢气)
Zn+2HCl ==ZnCl2+H2↑
现象:锌片逐渐减少,有气泡生成。
Mg+2HCl ==MgCl2+H2↑ Mg+H2SO4 ==MgSO4+H2↑
现象:镁条逐渐减少,有气泡生成。
Fe+2HCl ==FeCl2+H2↑
Fe+H2SO4 ==FeSO4+H2↑
现象:铁片逐渐溶解,溶液变成浅绿色,有气泡生成。
2Al+6HCl== 2AlCl3+3H2↑
2Al+3H2SO4== Al2(SO4)3+3H2↑
现象:锌片逐渐减少,有气泡生成。
用胃舒平(氢氧化铝)中和过多的胃酸:
Al(OH)3+3HCl==AlCl3+3H2O
用氢氧化镁中和过多的胃酸:
Mg(OH)2+2HCl==MgCl2+2H2O
★用小苏打治疗胃酸过多:
NaHCO3+HCl==NaCl+H2O+CO2↑
★用熟石灰中和含有硫酸的污水:
Ca(OH)2+H2SO4==CaSO4+2H2O
★稀盐酸除铁锈:
Fe2O3+6HCl==2FeCl3+3H2O
稀硫酸除铁锈:
Fe2O3+3H2SO4==Fe2(SO4)3+3H2O
★误食碳酸钡后发生中毒的原因:
BaCO3+2HCl==BaCl2+H2O+CO2↑
泻盐(MgSO4)解毒:
BaCl2+MgSO4==MgCl2+BaSO4↓
★工业制取烧碱:
Ca(OH)2+Na2CO3==2NaOH+CaCO3↓
硫酸铵与氢氧化钠溶液反应:
(NH4)2SO4+2NaOH==Na2SO4+2NH3↑+2H2O
★将熟石灰与氯化铵两种固体一起研磨,闻到刺激性气味:
2NH4Cl+Ca(OH)2==CaCl2+2NH3↑+2H2O
将熟石灰与硫酸铵两种固体一起研磨,闻到刺激性气味:
(NH4)2SO4+Ca(OH)2==CaSO4+2NH3↑+2H2O
★生成蓝色沉淀的反应:
CuSO4+2NaOH==Cu(OH)2↓+Na2SO4
生成红褐色沉淀的反应:
FeCl3+3NaOH==Fe(OH)3↓+3NaCl
生成白色沉淀的反应:
MgCl2+2NaOH==Mg(OH)2↓+2NaCl
生成白色沉淀的反应:
MgSO4+Ba(OH)2==Mg(OH)2↓+BaSO4↓
生成蓝白沉淀的反应:
CuSO4+Ba(OH)2==Cu(OH)2↓+BaSO4↓
生成红白沉淀的反应:
Fe2(SO4)3+3Ba(OH)2==2Fe(OH)3↓+3BaSO4↓配制波尔多液时发生的反应:
CuSO4+Ca(OH)2==CaSO4+Cu(OH)2↓
1、Great works are performed not by strengh, but by perseverance.
20.6.166.16.202009:3409:34:33Jun-2009:34 2、I stopped believing in Santa Claus when I was six. Mother took me to see him in a department store and he asked for my autograph.。二〇二〇年六月十六日2020年6月16日星期二
3、Your time is limited, so don't waste it living someone else's
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7、When the fight begins within himself a man's worth something.20.6.1620.6.1620.6.16。2020年6月16日星期二二〇二〇年六月十六日
8、What's bred in the bone will come out in the flesh.09:3409:34:336.16.2020Tuesday, June 16, 2020
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