cu 必备高中方程式（Cu high school equation）.docVIP

cu 必备高中方程式（Cu high school equation） Properties of aluminium and aluminium compounds 1, pure aluminum (learning from metal penetrating angle) A and Al reacted with (O2, S, Cl2) respectively: 4Al+3O2, 2Al2O3, 2Al+3S, Al2S3, 2Al+3Cl2, 2AlCl3 B, aluminum and non oxidizing acid reaction of hydrogen 2Al+3H2SO4 = Al2 (SO4 = 3+3H2) Ionic equation: C, aluminum and concentrated sodium hydroxide solution reaction ion equation 2NaOH+2Al+2H2O = 2NaAlO2+3H2 = Ionic equation: D and thermit reaction: 4Al+3MnO2 2Al2O3+3Mn 2, alumina (amphoteric oxide angle) a and Al2O3 + 6H+ acid = = 2Al3+ + 3H2O B reacted with strong base 2NaOH+Al2O3 = 2NaAlO2+H2O 3, aluminum hydroxide (aluminum acid) (amphoteric hydroxide angle) A Al (OH) and strong response to 3 + 3H+ = Al3+ + 2H2O B Al (OH) and alkali reaction OH== AlO2+ + 3 2H2O 4, aluminum salt (learning from salt characteristic angle) (1) aluminium chloride The reaction of Al3+ + 3OH== Al A and alkali (OH): 3 Al3+ + 4OH== AlO2+ 2H2O Al3+ + 3NH3? H2O = Al (OH): 3NH4+ + 3 B hydrolysis (strong acid, weak base salt) Al3+ + 3H2O Al (OH) 3 + 3H+ Al3+ + 3AlO2+ 6H2O== 4Al (OH): 3 3Na2CO3+2AlCl3+3H2O = 2Al (OH) 3: +3CO2 = +6NaCl (2Al3+ + 3CO32+ = = 2Al 3H2O (OH) 3CO2 3 + down arrow) 3NaHCO3+AlCl3 = Al (OH): +3CO2 = 3 (Al3+ + Al 3HCO3== (OH): 3CO2 = + 3) *2Al3+ 3S2+ + 6H2O = = 2Al (OH): 3H2S = 3 + *Al3+ 3HS+ + 3H2O = = Al (OH): 3H2S = 3 + (2) sodium metaaluminate (learning from salt alkaline hydrolysis of NaAlO2 showed characteristic angle) A reacts with acid AlO2+ H+ + H2O = Al (OH): 3 AlO2+ 4H+ = Al3+ + 2H2O 2NaAlO2+CO2+3H2O = 2Al (OH) 3: +Na2CO3 NaAlO2 + CO2 + 2H2O = Al (OH) 3: +NaHCO3 2AlO2+ CO2 + 3H2O ==2 Al (OH): 3 + CO32 AlO2+ CO2 + 2H2O = Al + 3 (OH): HCO3 The hydrolysis of B (NaHCO3) 3NaAlO2+AlCl3+6H2O = 4Al (OH) 3: +3NaCl (3) [KAl (SO4) 2] aluminum potassium sulfate compound aluminum potassium sulfate is composed of two kinds of metal cations and a radical ion, this class of compounds called salt. KAl (SO4) 2? 12H2O the name of alum, is a kin