The chemical properties of aluminum, its compounds, its generality, and chemical equations

First, the properties of aluminum, the chemical properties are relatively active, in the reaction is mostly oxidized to the positive trivalent state of aluminum ions, aluminum can be burned in pure oxygen oxidation into aluminum oxide, aluminum and hydrochloric acid reaction, aluminum dissolved in NaOH solution reaction, magnesium strips ignite aluminum powder, ferric oxide mixture, the reaction is called thermite reaction;

The second bond, an important compound of aluminum, alumina belongs to ionic compounds, alumina belongs to typical amphoteric oxides, and acid residue solution, strong alkali can react, alumina dissolves in hydrochloric acid, alumina reacts with caustic soda solution, aluminum hydroxide soluble aluminum salt and ammonia water reaction can produce aluminum hydroxide.

Chemical properties: Aluminum is a reactive metal, and a dense oxide film with a thickness of about 50 angstroms is immediately formed on the surface of aluminum in dry air, so that aluminum will not be further oxidized and can resist water; However, the powder of aluminum is extremely flammable when mixed with air; Molten aluminium reacts violently with water; At high altitude temperature, many metal oxides can be reduced to corresponding metals; Aluminum is amphoterectic, i.e., soluble in strong alkalis and soluble in dilute acids.

About chemical equations.

2al +6hcl ==2alcl3+ 3h2↑

2Al + 3H2SO4 (dilute) ==Al2 (SO4)3 + 3H2

2al + 2naoh + 2h2o ==2naalo2+3h2↑

AL + 6HNO3 (concentrated) = = AL (NO3) 3 + 3NO2 + 3H2O

AL + 4HNO3 (dilute) ==AL(NO3)3+ NO + 2H2O

8AL + 30HNO3 (a little thinner) ==8AL (NO3)3 + 3N2O + 15H2O

8AL + 30HNO3 (very rare) ==8AL (NO3)3 + 3NH4NO?↑+9h2o

8al + 3fe3o4===4al2o3+9fe

2al(oh)3==δal2o3+3 h2o

al2(so4)3+ 6nh4·h2o ==2al(oh)3↓+ 3(nh4)2so4

al2o3+ 6hcl=2alcl3+ 3h2o

al2o3+2naoh+2h20===2naalo2+3h2o

Guess Al2O3+ 2NaOH + 3H2O ==2Na[Al(OH)4].

alcl3+ 3naoh ==al(oh)3↓+ 3nacl

al(oh)3+ naoh ==na[al(oh)4]

Al2(SO4)3+ 6 NaHCO3===2 Al(OH)3 Bucket Finger + 3 Na2SO4+ 6 CO2

Naalo2 + HCl (a small amount) + H2O ==AL(OH)?↓nacl

al(oh)3+ 3 hcl ==alcl3+ 3 h2o

Naalo2 + 4 HCl (excess) ==ALCL3 + NaCl + 2 H2O

2Naalo2 + CO2 (a small amount) + 3 H2O ==2 Al(OH)3 + Na2CO3 strong acid to weak acid.

Naalo2 + CO2 (overdose) + 2H2O ==Al(OH)3 + NaHCO3

naalo2+nahco3+ h2o===al(oh)3↓+na2co3

alcl3+ 3 naalo2+ 6 h2o===4 al(oh)3↓+3nacl

4al+3o2===2al2o3 (ignition).

Chemical properties of aluminum: Aluminium is a reactive metal, and a dense oxide film with a thickness of about 50 angstroms (1 angstroms = nanometers) is immediately formed on the surface of aluminum in dry air, so that aluminum will not be further oxidized and can resist water; However, the powder of aluminum is extremely flammable when mixed with air; Molten aluminium reacts violently with water; Aluminum is amphoteric and highly soluble in strong alkali Youhu and can also be soluble in dilute acid.

Aluminum is a metallic element, the element symbol is AL, and it is a silvery-white light balance metal. Malleable. Products are often made in sticks, sheets, foils, powders, bands, and filaments.

In humid air, it can form an oxide film to prevent metal corrosion. When heated in the air, the aluminium powder burns violently and emits a dazzling white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solutions, insoluble in water.