鋁三角涉及反應(yīng)
(1) 2Al + 2NaOH + 2H2O === 2NaAlO2 + 3H2
(2) 4Al + 3O2 === 2Al2O3(條件:點(diǎn)燃)
[2Al + Fe2O3 === Al2O3 + 2Fe(條件:高溫)]
(3) 2Al2O3 === 4Al + 3O2↑(條件:電解)
(4) 2Al + 3Cl2 === 2AlCl3(條件:點(diǎn)燃)
[2Al + 6HCl === 2AlCl3 + 3H2↑]
(5) Al2O3 + 2NaOH === 2NaAlO2 + H2O
(6) Al2O3 + 6HCl === 2AlCl3 + 3H2O
(7) NaAlO2 + HCl + H2O === NaCl + Al(OH)3 ↓
(8) Al(OH)3 + NaOH === NaAlO2 + 2H2O
(9) 2Al(OH)3 === Al2O3 + 3H2O(條件:加熱)
(10)Al(OH)3 + 3HCl === AlCl3 + 3H2O
(11)AlCl3 + 3NH3.H2O === Al(OH)3 ↓+ 3NH4Cl
[AlCl3 + 3NaOH === Al(OH)3 ↓ + 3NaCl]
(12) NaAlO2 + 4HCl(過) === AlCl3 + NaCl + 2H2O
(13)AlCl3+ 3 NaAlO2+ 6 H2O====4 Al(OH)3↓+3NaCl
(14)Al2(SO4)3+ 6 NaHCO3==== 2 Al(OH)3↓+ 3 Na2SO4+ 6 CO2↑
(15)2NaAlO2+ CO2(少量)+ 3 H2O ==== 2 Al(OH)3↓+ Na2CO3
(16)NaAlO2+ CO2(過量)+ 2H2O ==== Al(OH)3↓+ NaHCO3
離子方程式：
1 Al3+ + 3OH- = Al(OH)3 ↓
2 Al(OH)3 + 3H+ = Al3+ + 3H2O
3 Al(OH)3 + OH- = AlO2- + 2H2O
4 AlO2- + H+ + H2O = Al(OH)3 ↓
5 Al3+ + 4OH- = AlO2- + 2H2O
6 AlO2-+ 4H+ = Al3+ + 2H2O