Middle School Chemistry All Chemistry Equations Good 10

1. Zinc and dilute sulfuric acid: Zn + H2SO4 = ZnSO4 + H2 2, iron and dilute sulfuric acid: Fe + H2SO4 = FeSO4 + H2 3, magnesium and dilute sulfuric acid:

Mg + H2SO4 = MgSO4 + H24, Aluminium and dilute sulfuric acid: 2Al + 3H2SO4 = Al2(SO4)3 +3 H2

5. Zinc and dilute hydrochloric acid: Zn + 2HCl ==ZnCl2 + H2 6, iron and dilute hydrochloric acid: Fe + 2HCl ==FeCl2 + H2 7, magnesium and dilute hydrochloric acid:

Mg+ 2HCl ==MgCl2 + H2 8, Aluminum and dilute hydrochloric acid: 2AL + 6HCl ==2ALCL3 + 3 H2

9. Hydrochloric acid and caustic soda reaction: HCL + NaOH ==NaCl + H2O10, hydrochloric acid and potassium hydroxide reaction: HCL + KOH ==KCl + H2O11, hydrochloric acid and copper hydroxide reaction:

2hcl + cu(oh)2== cacl2 + 2h2o

1. Reaction between lime water and carbon dioxide: Ca(OH)2

co2= caco3

h2o；2. Reaction between marble and dilute hydrochloric acid: caCO3

2hcl = cacl2

h2o + co2

3. Hydrogen peroxide under the condition of manganese dioxide as catalyst: H2O2Mno2

2h2o+ o2

4. Heating potassium permanganate: 2kmNO4

k2mno4

mno2+ o2

5. Heating potassium chlorate and manganese dioxide mixed heating: 2kclo3=mno2, heating = 2kcl+3o2;

6. High temperature calcined limestone (industrial carbon dioxide): CaCO3 high temperature. cao + co2

7. Electrolyzed water: 2H2O energized.

2h2↑+ o2

8. Carbon monoxide reduced iron oxide: 3CO+FE2O3=high temperature=2FE+3CO2;

9. Sodium chloride solution and silver nitrate solution: NaCl + Agno3 = AgCl + Nano3

10. Sodium sulfate and barium chloride: Na2

so4 + bacl2

baso4

2nacl；

11. Caustic soda deteriorates when exposed to air: 2NaOH + CO2 = Na2CO3

h2o ；12. Calcium hydroxide and sodium carbonate: Ca(OH)2

na2co3

caco3+ 2naoh。

1. Calcium hydroxide aqueous solution reacts with carbon dioxide: Ca(OH)2+ CO2= CaCO3

h2o；2. Calcium carbonate reacts with dilute hydrochloric acid: CaCO3

2hcl = cacl2

h2o + co2

3. Hydrogen peroxide under the condition of manganese dioxide as catalyst: H2O2Mno2

2h2o+ o2

4. Heating potassium permanganate: 2kmNO4

k2mno4

mno2+ o2

5. Heating potassium chlorate and manganese dioxide mixed heating: 2kclo3=mno2, heating = 2kcl+3o2;

6. High-temperature calcined calcium carbonate (industrial carbon dioxide): CaCO3 high temperature. cao + co2

7. Electrolyzed water: 2H2O energized.

2h2↑+ o2

8. Carbon monoxide reduction of ferric oxide: 3CO + FE2O3 = high temperature = 2FE + 3CO2;

9. Sodium chloride solution and silver nitrate solution: NaCl + Agno3 = AgCl + Nano3

10. Sodium sulfate and barium chloride: Na2

so4 + bacl2

baso4

2nacl；

11. Sodium hydroxide deteriorates when exposed to air: 2NaOH + CO2 = Na2CO3

h2o ；12. Calcium hydroxide and sodium carbonate: Ca(OH)2

na2co3

caco3+ 2naoh

zn + cu so4 = znso4 + cu

cuo + h2 so4 = cu so4 + h2o

The sodium hydroxide solution reacts with the copper sulfate solution: 2NaOH + CuSO4 ==Cu(OH)2 + Na2SO4

Methane burns in air: CH4 + 2O2 ignites CO2 + 2H2O

Alcohol burns in air: C2H5OH + 3O2 ignites 2CO2 + 3H2O

Carbon monoxide reduced copper oxide: CO+ Cuo heated Cu + CO2

Carbon monoxide reduces iron oxide: 3CO + Fe2O3 High temperature 2Fe + 3CO2

Carbon dioxide passes through clarified lime water (test carbon dioxide): Ca(OH)2 + CO2 ==CaCO3 + H2O

Sodium hydroxide and carbon dioxide reaction (carbon dioxide removed): 2NaOH + CO2 ==Na2CO3 + H2O

Reaction of limestone (or marble) with dilute hydrochloric acid (laboratory preparation of carbon dioxide): CaCO3 + 2HCl ==CaCl2 + H2O + CO2

Sodium carbonate reacts with concentrated hydrochloric acid (principle of foam fire extinguisher): Na2CO3 + 2HCl ==2NaCl + H2O + CO2

These are common chemistry equations in junior high school and are used in exams.

01. Carbon monoxide is burned in oxygen, 2CO+O2===2CO2

02. Quicklime reacts with water: CaO+H2O==Ca(OH)2

03. Reaction of iron and copper sulfate solution: Fe+CuSO4==FeSO4+Cu

05. Magnesium and dilute hydrochloric acid reaction: mg+2HCl==mgCl2+H2

06. Hydrochloric acid and caustic soda react: HCl+Naoh==NaCl+H2O

07. Sodium hydroxide and copper sulfate: 2NaOH+CuSO4==Cu(OH)2+Na2SO4

08. Sodium chloride solution and silver nitrate solution: NaCl+AgNO3==AGCL+Nano3

09. Sodium sulfate and barium chloride: Na2SO4 + BACl2 = = BaSO4 + 2NaCl

10. Methane burns in the air: CH4+2O2 ignites CO2+2H2O

11. Alcohol burns in the air: C2H5OH+3O2 ignites 2CO2+3H2O

12. Carbon monoxide reduces iron oxide: 3CO+Fe2O3 and high temperature 2FE+3CO2

13. Carbon dioxide through clarified lime water (test carbon dioxide): Ca(OH)2+CO2==CaCO3+H2O

14. Reaction of sodium hydroxide and carbon dioxide (removing carbon dioxide): 2NaOH + CO2 = = Na2CO3 + H2O

15. Caustic soda absorbs sulfur dioxide gas: 2NaOH + SO2 = = Na2SO3 + H2O

16. Reaction between sulfuric acid and caustic soda: H2SO4 + 2NaOH = = Na2SO4 + 2H2O

17. Aluminum hydroxide drug ** hyperacidity: 3HCl + AL (OH) 3 = = ALCL3 + 3H2O

18. High-temperature calcined limestone (carbon dioxide industrial production method): CaCO3 high-temperature CaO+CO2

19. Water is divided into 2H2O energized 2H2+O2 under the action of direct current

20. Heating potassium permanganate: 2kmNO4 K2MNO4 + MNO2 + O2