Răspuns:
Explicație:
a.
4Al +3 O2=2Al2O3
Al2 O3 +6 HCl =2 AlCl3 +3H2O
AlCl3 +3NaOH=Al(OH)3 + 3NaCl
2Al(OH)3 + 3H2SO4=Al2 (SO4 )3 +6H2O
b.
2Al2 O3=4 Al +3O2
2Al + 3Cl2= 2AlCl3
AlCl3+ 3NaNO3=Al(NO3 )3 +3 NaCl
2Al +6 H20= 2Al(OH)3 +3H2
c.
4Al +3 O2=2Al2O3
Al2O3 +3H20=2 Al(OH )3
Al(OH )3 +3HCl=AlCl3 +3H2O
Al(OH )3 + NaOH= Na[ Al (OH)4 ]
