\(1a.\left(1\right)Al\left(NO_3\right)_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\\ \left(2\right)2Al\left(OH\right)_3-^{t^o}\rightarrow Al_2O_3+3H_2O\\ \left(3\right)2Al_2O_3-^{đpnccriolit}\rightarrow4Al+3O_2\\ \left(4\right)2Al+6HCl\rightarrow AlCl_3+3H_2\\ Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ \left(5\right)Al_2\left(SO_4\right)_3+8NaOH\rightarrow3NaAlO_2+2NaAlO_2+4H_2O\\ NaAlO_2+CO_2+2H_2O\rightarrow NaHCO_3+Al\left(OH\right)_3\)
\(b.\left(1\right)Mg+O_2-^{t^o}\rightarrow MgO\\ \left(2\right)MgO+2HCl\rightarrow MgCl_2+H_2O\\ \left(3\right)MgCl_2+2AgNO_3\rightarrow Mg\left(NO_3\right)_2+AgCl\\\left( 4\right)Mg\left(NO_3\right)_2+Ba\left(OH\right)_2\rightarrow Mg\left(OH\right)_2+Ba\left(NO_3\right)_2\)
