Combustion of magnesium in air: 2Mg+O2 2MgO ★
Combustion of iron in oxygen: 3Fe+2O2 Fe3O4 ★
Copper is heated in air: 2Cu+O2 2CuO ★
Combustion of aluminum in oxygen: 4al+3o2al2o3 ★
2. Reaction of nonmetallic simple substance with oxygen
Combustion in hydrogen and air: 2h2+O2 2h2o★
Combustion of red phosphorus in air: 4P+5O2 2P2O5 ★
Complete combustion of carbon in oxygen: C+O2 CO2 ★
Incomplete combustion of carbon in oxygen: 2C+O2 2CO ★
3. Reaction of compounds with oxygen
Combustion of carbon monoxide in oxygen: 2CO+O2 2CO2 ★
Combustion of methane in air: CH4+2O2 CO2+2H2O ★
Alcohol burns in air: C2H5OH+3O2CO2+3H2O★
Second, the reaction of making gas.
1. Hydrogen peroxide decomposes with manganese dioxide as catalyst to produce oxygen;
2H2O2 2H2O + O2 ↑★★
2. Reaction of marble with dilute hydrochloric acid (carbon dioxide made in laboratory): ★★★
CaCO3 + 2HCl == CaCl2 + H2O + CO2
Calcining limestone at high temperature (industrial carbon dioxide production): ★
CaCO3 CaO + CO2↑
Third, the chemical properties of carbon dioxide.
1. Reaction of carbon dioxide with water: H2O+CO2 == H2CO3 ★
Carbonic acid is unstable. Decomposition: H2CO3 = = H2O+CO2 =★
2. Explain the reaction between limewater and carbon dioxide (identify carbon dioxide): ★★★★
Calcium hydroxide+carbon dioxide = = calcium carbonate ↓+ H2O
The reason why water drops penetrate the stone is CaCO3+H2O+CO2 = = Ca (HCO3) 2) 2.
The formation of stalactites: Ca (Ca (HCO3) 2 = = CaCO3+H2O+CO2 =
Lime reacts with water to produce hydrated lime: CaO+H2O == Ca(OH)2 ★
3. Caustic soda deteriorates when exposed to air: 2NaOH+CO2 == Na2CO3+H2O ★★
Four, the composition of water experiment
Decomposition of water under the action of direct current (water composition experiment);
2H2O 2H2↑+ O2 ↑★★
Verb (abbreviation of verb) double decomposition reaction
1. Acid+alkali → salt+water
Reaction between hydrochloric acid and caustic soda: HCl+NaOH = = NaCl+H2O★★
Reaction between hydrochloric acid and calcium hydroxide: 2 HCl+Ca (OH) 2 = = CaCl2+2H2O★★★
Treatment of hyperacidity with aluminum hydroxide: 3HCl+Al (OH) 3 = = AlCl3+3H2O★★★
Reaction between sulfuric acid and caustic soda: H2SO4+2NaOH = = Na2SO4+2H2O★★★
2. Acid+salt → new salt+new acid
Reaction of marble with dilute hydrochloric acid (carbon dioxide produced in laboratory): ★★★★
CaCO3 + 2HCl == CaCl2 + H2O + CO2
Na2CO3 + 2HCl == 2NaCl+ H2O + CO2↑ ★
Sodium carbonate+sulfuric acid = = sodium sulfate+H2O+carbon dioxide =
The reaction between sulfuric acid and barium chloride solution: H2SO4+BaCl2 == BaSO4 ↓+ 2HCl ★★
3. Alkali+salt → new salt+new alkali
Calcium hydroxide and sodium carbonate: Ca(OH)2+Na2CO3 == CaCO3↓+ 2NaOH★★
Sodium hydroxide and copper chloride: 2NaOH+CuCl2 == Cu(OH)2↓+ 2NaCl★★
Calcium hydroxide and ammonium chloride: 2nh4cl+Ca (OH) 2 = CaCl2+2nh3 =+2h2o★
4. Salt+Salt → Two New Salts
Reaction of sodium chloride solution and silver nitrate solution;
NaCl + AgNO3 == AgCl↓ + NaNO3 ★★
Na2CO3 + BaCl2== BaCO3↓ + 2NaCl ★★
5. Metal oxide+acid → salt+water
Reaction of iron oxide with dilute hydrochloric acid: Fe2O3+6HCl = = 2fecl3+3H2O★★
Reaction of iron oxide with dilute sulfuric acid: Fe2O3+3H2SO4 == Fe2(SO4)3+3H2O ★
Reaction of copper oxide with dilute sulfuric acid: CuO+H2SO4 == CuSO4+3H2O ★
This is what I use when reviewing for my students. I hope I can help you.