优质解答
Al单质:
2Al+3Cl2===2AlCl3
4Al+3O2===2Al2O3(钝化)
4Al(Hg)+3O2+2xH2O===2(Al2O3.xH2O)+4Hg
4Al+3MnO2===2Al2O3+3Mn
2Al+Cr2O3===Al2O3+2Cr
2Al+Fe2O3===Al2O3+2Fe
2Al+3FeO===Al2O3+3Fe
2Al+6HCl===2AlCl3+3H2
2Al+3H2SO4===Al2(SO4)3+3H2
2Al+6H2SO4(浓)===Al2(SO4)3+3SO2+6H2O
(Al,Fe在冷,浓的H2SO4,HNO3中钝化)
Al+4HNO(稀)===Al(NO3)3+NO+2H2O
2Al+2NaOH+2H2O===2NaAlO2+3H2
Al2O3是两性氧化物:
Al2O3+3H2SO4===Al2(SO4)3+3H2O
Al2O3+2NaOH===2NaAlO2+H2O)
NaAlO2
CO2(不足)+2NaAlO2+3H2O===2Al(OH)3↓+Na2CO3
CO2+3H2O+AlO2–=Al(OH)3↓+CO32–
CO2(足)+NaAlO2+2H2O===Al(OH)3↓+NaHCO3
CO2+2H2O+AlO2–=Al(OH)3↓+HCO3–
Al(OH)3
氢氧化铝与酸反应:Al(OH)3+3HCl==AlCl3+3H2O(可用来中和胃酸)
Al(OH)3+3H+→Al3++3H2O
氢氧化铝与碱反应:Al(OH)3+NaOH→Na[Al(OH)4]==NaAlO2+2H2O
Al单质:
2Al+3Cl2===2AlCl3
4Al+3O2===2Al2O3(钝化)
4Al(Hg)+3O2+2xH2O===2(Al2O3.xH2O)+4Hg
4Al+3MnO2===2Al2O3+3Mn
2Al+Cr2O3===Al2O3+2Cr
2Al+Fe2O3===Al2O3+2Fe
2Al+3FeO===Al2O3+3Fe
2Al+6HCl===2AlCl3+3H2
2Al+3H2SO4===Al2(SO4)3+3H2
2Al+6H2SO4(浓)===Al2(SO4)3+3SO2+6H2O
(Al,Fe在冷,浓的H2SO4,HNO3中钝化)
Al+4HNO(稀)===Al(NO3)3+NO+2H2O
2Al+2NaOH+2H2O===2NaAlO2+3H2
Al2O3是两性氧化物:
Al2O3+3H2SO4===Al2(SO4)3+3H2O
Al2O3+2NaOH===2NaAlO2+H2O)
NaAlO2
CO2(不足)+2NaAlO2+3H2O===2Al(OH)3↓+Na2CO3
CO2+3H2O+AlO2–=Al(OH)3↓+CO32–
CO2(足)+NaAlO2+2H2O===Al(OH)3↓+NaHCO3
CO2+2H2O+AlO2–=Al(OH)3↓+HCO3–
Al(OH)3
氢氧化铝与酸反应:Al(OH)3+3HCl==AlCl3+3H2O(可用来中和胃酸)
Al(OH)3+3H+→Al3++3H2O
氢氧化铝与碱反应:Al(OH)3+NaOH→Na[Al(OH)4]==NaAlO2+2H2O