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20 tháng 12 2023

\(4Al+3O_2\underrightarrow{^{^{t^0}}}2Al_2O_3\)

\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)

\(2Al\left(OH\right)_3^{ }\underrightarrow{^{^{t^0}}}Al_2O_3+3H_2O\)

\(2Al_2O_3\underrightarrow{^{^{đpnc}}}4Al+3O_2\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

10 tháng 1 2023

\(\left(1\right)2Al+6HCl\rightarrow2AlCl_3+3H_2\)

\(\left(2\right)AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)

\(\left(3\right)2Al\left(OH\right)_3\rightarrow Al_2O_3+3H_2O\)

\(\left(4\right)Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

3 tháng 1 2023

(1) \(2Al+3Cl_2\xrightarrow[]{t^\circ}2AlCl_3\)

(2) \(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3\downarrow+3NaCl\)

(3) \(2Al\left(OH\right)_3\xrightarrow[]{t^\circ}Al_2O_3+3H_2O\uparrow\)

(4) \(2Al_2O_3\xrightarrow[]{\text{đpnc}}4Al+3O_2\uparrow\)

16 tháng 11 2021

a. 

\(\left(1\right)Fe+2HCl--->FeCl_2+H_2\)

\(\left(2\right)FeCl_2+2NaOH--->2NaCl+Fe\left(OH\right)_2\)

\(\left(3\right)4Fe\left(OH\right)_2+O_2+2H_2O\overset{t^o}{--->}4Fe\left(OH\right)_3\)

\(\left(4\right)2Fe\left(OH\right)_3\overset{t^o}{--->}Fe_2O_3+3H_2O\)

\(\left(5\right)Fe_2O_3+6HCl--->2FeCl_3+3H_2O\)

b.

\(\left(1\right)4Al+3O_2\overset{t^o}{--->}2Al_2O_3\)

\(\left(2\right)Al_2O_3+6HCl--->2AlCl_3+3H_2O\)

\(\left(3\right)AlCl_3+3NaOH--->Al\left(OH\right)_3+3NaCl\)

\(\left(4\right)2Al\left(OH\right)_3\overset{t^o}{--->}Al_2O_3+3H_2O\)

\(\left(5\right)Al_2O_3+3H_2SO_4--->Al_2\left(SO_4\right)_3+3H_2O\)

25 tháng 11 2021

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18 tháng 11 2021

\(b,\left(1\right)4Al+3O_2\rightarrow^{t^o}2Al_2O_3\\ \left(2\right)Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\\ \left(3\right)AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\\ \left(4\right)2Al\left(OH\right)_3\rightarrow^{t^o}Al_2O_3+3H_2O\\ \left(5\right)Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

18 tháng 11 2021

\(a,\left(1\right)Fe+2HCl\rightarrow FeCl_2+H_2\\ \left(2\right)FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl_2\\ \left(3\right)4Fe\left(OH\right)_2+O_2+2H_2O\rightarrow4Fe\left(OH\right)_3\\ \left(4\right)2Fe\left(OH\right)_3\rightarrow^{t^o}Fe_2O_3+3H_2O\\ \left(5\right)Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)

20 tháng 12 2023

\(2Al+3O_2\underrightarrow{^{^{t^o}}}2Al_2O_3\)

\(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

\(Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow2AlCl_3+3BaSO_4\)

\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)

\(2Al\left(OH\right)_3\underrightarrow{^{^{t^o}}}Al_2O_3+3H_2O\)

\(2NaOH+Al_2O_3\rightarrow2NaAlO_2+H_2O\)

23 tháng 12 2021

\(a,2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ FeCl_3+3NaOH\to Fe(OH)_3\downarrow+3NaCl\\ 2Fe(OH)_3+3H_2SO_4\to Fe_2(SO_4)_3+6H_2O\\ Fe_2(SO_4)_3+3Zn\to 3ZnSO_4+2Fe\\ Fe+2HCl\to FeCl_2+H_2\\ b,4Al+3O_2\xrightarrow{t^o}2Al_2O_3\\ Al_2O_3\xrightarrow[cryolit]{đpnc}4Al+3O_2\\ 2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+6NaOH\to 2Al(OH)_3\downarrow+3Na_2SO_4\\ 2Al(OH)_3\xrightarrow{t^o}Al_2O_3+3H_2O\)