(1) Al->Al2O3 (2) Al2O3->Al (3) Al2O3->Al2(SO4)3 (4) Al2(SO4)3->AlCl3 (5)AlCl3->Al(NO3)3 (6)Al(NO3)3->Al (7)Al->KAlO2 (8) Al(NO3)3->Al(OH)3 (9)Al(OH)3->Al(NO3)3 (10) Al(OH)3->AlCl3 (11) Al(OH)3->Al2(SO4)3 (12) Al(OH)3->Al2O3

Đáp án:

Giải thích các bước giải:

(1) 4Al+3O2 -t°->2Al2O3

(2) 2Al2O3 -t°->4Al+3O2

(3) Al2O3+3H2SO4 ->Al2(SO4)3 +3H2O

(4) Al2(SO4)3+3BaCl2->3AlCl3+3BaSO4

(5)AlCl3+3AgNO3->Al(NO3)3 +3AgCl

6)2Al(NO3)3+3Mg->3Mg(NO3)2+2Al

(7)2Al+2KOH+2H2O->2KAlO2+3H2

(8) Al(NO3)3+3NaOH->Al(OH)3+3NaNO3

(9)Al(OH)3+3HNO3->Al(NO3)3+3H2O

(10) Al(OH)3+3HCl->AlCl3+3H2O

(11) 2Al(OH)3+3H2SO4 ->Al2(SO4)3+6H2O

(12) 2Al(OH)3->Al2O3+3H2O

Các phản ứng xảy ra:

\(4{\text{A}}l + 3{{\text{O}}_2}\xrightarrow{{{t^o}}}2{\text{A}}{l_2}{O_3}\)

\(2{\text{A}}{l_2}{O_3}\xrightarrow{{c{\text{r}}i{\text{o}}lit}}4{\text{A}}l + 3{{\text{O}}_2}\)

\(A{l_2}{O_3} + 3{H_2}S{O_4}\xrightarrow{{}}A{l_2}{(S{O_4})_3} + 3{H_2}O\)

\(A{l_2}{(S{O_4})_3} + 3BaC{l_2}\xrightarrow{{}}3BaS{O_4} + 2{\text{A}}lC{l_3}\)

\(AlC{l_3} + 3{\text{A}}gN{O_3}\xrightarrow{{}}3{\text{A}}gCl + Al{(N{O_3})_3}\)

\(3Mg + 2{\text{A}}l{(N{O_3})_3}\xrightarrow{{}}3Mg{(N{O_3})_2} + 2{\text{A}}l\)

\(2KOH + 2{\text{A}}l + 2{H_2}O\xrightarrow{{}}2KAl{O_2} + 3{H_2}\)

\(Al{(N{O_3})_3} + 3NaOH\xrightarrow{{}}Al{(OH)_3} + 3NaN{{\text{O}}_3}\)

\(Al{(OH)_3} + 3HN{O_3}\xrightarrow{{}}Al{(N{O_3})_3} + 3{H_2}O\)

\(Al{(OH)_3} + 3HCl\xrightarrow{{}}AlC{l_3} + 3{H_2}O\)

\(2{\text{A}}l{(OH)_3} + 3{H_2}S{O_4}\xrightarrow{{}}A{l_2}{(S{O_4})_3} + 6{H_2}O\)

\(2{\text{A}}l{(OH)_3}\xrightarrow{{{t^o}}}A{l_2}{O_3} + 3{H_2}O\)