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

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

a) 

(1) \(2Al+3FeCl_2\rightarrow2AlCl_3+3Fe\)

(2) \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)

(3) \(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\)

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

b) 

(1) \(2Cu+O_2\underrightarrow{t^o}2CuO\)

(2) \(CuO+2HCl\rightarrow CuCl_2+H_2O\)

(3) \(CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\downarrow\)

(4) \(Cu\left(NO_3\right)_2+2NaOH\rightarrow Cu\left(OH\right)_2\downarrow+2NaNO_3\)

(5) \(Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\)

(6) \(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)

Cảm ơn cậu nhìu<3

\(CaC_2+2H_2O\rightarrow Ca\left(OH\right)_2+C_2H_2\\ C_2H_2+Br_{2\left(thiếu\right)}\rightarrow C_2H_2Br_2\\ 2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\\ CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)

\(\left(1\right)Zn+H_2SO_4\rightarrow ZnSO_4+H_2\\ \left(2\right)ZnSO_4+BaCl_2\rightarrow ZnCl_2+BaSO_4\\ \left(3\right)ZnCl_2+2NaOH\rightarrow Zn\left(OH\right)_2+2NaCl\\ \left(4\right)Zn\left(OH\right)_2\rightarrow^{t^o}ZnO+H_2O\)

\(C_2H_5OH+O_2\text{ }\underrightarrow{^{\text{men giấm}}}CH_3COOH+H_2O\)

\(CH_3COOH+C_2H_5OH⇌CH_3COOC_2H_5+H_2O\left(Dk:H_2SO_{4\left(đ\right)},t^0\right)\)

\(CH_3COOC_2H_5+NaOH\underrightarrow{^{t^0}}CH_3COONa+C_2H_5OH\)