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![](https://rs.olm.vn/images/avt/0.png?1311)
\(S+O_2\underrightarrow{t^o}SO_2\)
\(2SO_2+O_2\xrightarrow[t^o]{V_2O_5}2SO_3\)
\(SO_3+H_2O->H_2SO_4\)
\(2NaOH+H_2SO_4->Na_2SO_4+2H_2O\)
\(Na_2SO_4+BaCl_2->BaSO_4\downarrow+2NaCl\)
![](https://rs.olm.vn/images/avt/0.png?1311)
b) \(SO_2\underrightarrow{1}Na_2SO_3\underrightarrow{2}Na_2SO_4\underrightarrow{3}NaOH\underrightarrow{4}Na_2CO_3\)
(1) \(SO_2+2NaOH\rightarrow Na_2SO_3+H_2O\)
(2) \(Na_2SO_3+H_2SO_4\rightarrow Na_2SO_4+SO_2+H_2O\)
(3) \(Na_2SO_4+Ba\left(OH\right)_2\rightarrow2NaOH+BaSO_4\)
(4) \(2NaOH+CO_2\rightarrow Na_2CO_3+H_2O\)
Chúc bạn học tốt
c) \(CaO\underrightarrow{1}CaCO_3\underrightarrow{2}CaO\underrightarrow{3}Ca\left(OH\right)_2\underrightarrow{4}CaCO_3\underrightarrow{5}CaSO_4\)
(1) \(CaO+CO_2\rightarrow CaCO_3\)
(2) \(CaCO_3\underrightarrow{t^o}CaO+CO_2\)
(3) \(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)
(4) \(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)
(5) \(CaCO_3+H_2SO_4\rightarrow CaSO_4+CO_2+H_2O\)
Chúc bạn học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(1\right)2Al_2O_3\xrightarrow[Na_3AlF_6]{đpnc}4Al+3O_2\uparrow\)
\(\left(2\right)2Al+3H_2SO_4--->Al_2\left(SO_4\right)_3+3H_2\uparrow\)
\(\left(3\right)Al_2\left(SO_4\right)_3+3BaCl_2--->3BaSO_4\downarrow+2AlCl_3\)
\(\left(4\right)AlCl_3+3NaOH--->Al\left(OH\right)_3\downarrow+3NaCl\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1) 3Fe+3Cl2 -) 2FeCl3
2) FeCl3+3NaOH -) Fe(OH)3+3Nacl
3) 2Fe(OH)3 -t độ-) Fe2O3 + 3H20
4) Fe2O3+ 3H2SO4 -) Fe2(SO4)3 + 3H2O
5) Fe2(SO4)3 + 3Bacl2 -) 2FeCl3 + 3BaSO4
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+3BaCl_2\to 2AlCl_3+3BaSO_4\downarrow\\ AlCl_3+3NaOH\to Al(OH)_3\downarrow +3NaCl\\ 2Al(OH)_3\xrightarrow{t^o}Al_2O_3+3H_2O\\ 2Al_2O_3\xrightarrow{đpnc}4Al+3O_2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(1) \(C_2H_2+H_2\underrightarrow{t^o,Pd}C_2H_4\)
(2) \(C_2H_4+H_2O\underrightarrow{t^o,xt}C_2H_5OH\)
(3) \(C_2H_5OH+O_2\underrightarrow{^{mengiam}}CH_3COOH+H_2O\)
(4) \(2CH_3COOH+CuO\rightarrow\left(CH_3COO\right)_2Cu+H_2O\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 2:
\(2Fe\left(OH\right)_3\rightarrow\left(t^o\right)Fe_2O_3+3H_2O\\ Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\\ FeCl_3+3AgNO_3\rightarrow Fe\left(NO_3\right)_3+3AgCl\downarrow\\ Fe\left(NO_3\right)_3+3KOH\rightarrow Fe\left(OH\right)_3\downarrow+3KNO_3\\2 Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
$a)(1)S+O_2\xrightarrow{t^o}SO_2$
$(2)2SO_2+O_2\xrightarrow[V_2O_5]{t^o}2SO_3$
$(3)SO_3+H_2O\to H_2SO_4$
$(4)H_2SO_4+2NaOH\to Na_2SO_4+2H_2O$
$(5)Na_2SO_4+BaCl_2\to BaSO_4\downarrow+2NaCll$
$b)(1)SO_2+2NaOH\to Na_2SO_3+H_2O$
$(2)Na_2SO_3+H_2SO_4\to Na_2SO_4+H_2O+SO_2\uparrow$
$(3)Na_2SO_4+Ba(OH)_2\to BaSO_4\downarrow+2NaOH$
$(4)2NaOH+CO_2\to Na_2CO_3+H_2O$
$c)(1)CaO+CO_2\to CaCO_3$
$(2)CaCO_3\xrightarrow{t^o}CaO+CO_2$
$(3)CaO+H_2O\to Ca(OH)_2$
$(4)Ca(OH)_2+CO_2\to CaCO_3\downarrow+H_2O$
$(5)CaCO_3+H_2SO_4\to CaSO_4+H_2O+CO_2\uparrow$
$d)(1)2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3$
$(2)FeCl_3+3NaOH\to Fe(OH)_3\downarrow+3NaCl$
$(3)2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O$
$(4)Fe_2O_3+3H_2SO_4\to Fe_2(SO_4)_3+3H_2O$
$(5)Fe_2(SO_4)_3+3BaCl_2\to 2FeCl_3+3BaSO_4\downarrow$
$e)(1)Fe+2HCl\to FeCl_2+H_2$
$(2)FeCl_2+2AgNO_3\to Fe(NO_3)_2+2AgCl\downarrow$
$(3)Fe(NO_3)_2+2NaOH\to Fe(OH)_2\downarrow+2NaNO_3$
$(4)Fe(OH)_2+H_2SO_4\to FeSO_4+2H_2O$
$f)(1)2Cu+O_2\xrightarrow{t^o}2CuO$
$(2)CuO+2HCl\to CuCl_2+H_2O$
$(3)CuCl_2+2NaOH\to Cu(OH)_2\downarrow+2NaCl$
$(4)Cu(OH)_2\xrightarrow{t^o}CuO+H_2O$
$(5)CuO+H_2\xrightarrow{t^o}Cu+H_2O$
$(6)Cu+2H_2SO_{4(đ)}\to CuSO_4+SO_2\uparrow+2H_2O$
$g)(1)2Al_2O_3\xrightarrow[criolit]{đpnc}4Al+3O_2$
$(2)2Al+6HCl\to 2AlCl_3+3H_2$
$(3)AlCl_3+3NaOH\to Al(OH)_3\downarrow+3NaCl$
$(4)2NaCl+2H_2O\xrightarrow[cmn]{đpdd}2NaOH+Cl_2\uparrow+H_2\uparrow$
$(5)NaOH+CuCl_2\to Cu(OH)_2\downarrow+2NaCl$