初中化学常考化学方程式

初中化学常考化学方程式
初中化学常考化学方程式

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

life.09:346.16.202009:346.16.202009:3409:34:336.16.202009:346.16.2020

4、The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle.6.16.20206.16.202009:3409:3409:34:3309:34:33

5、Be brave and clear. Follow your heart and don't be overly influenced by outside factors. Be true to yourself.Tuesday, June 16, 2020June 20Tuesday, June 16, 20206/16/2020

6、I have no trouble being taken seriously as a woman and a diplomat [in Ghana].。9时34分9时34分16-Jun-206.16.2020

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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