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a) Các PTHH:
(1) 2 Fe +3 Cl2 -to-> 2 FeCl3
(2) FeCl3 + 3 NaOH -> Fe(OH)3 +3 NaCl
(3) 2 Fe(OH)3 -to-> Fe2O3 + 3 H2O
(4) Fe2O3 + 3 CO -to-> 2 Fe + 3 CO2
(5) Fe + 2 HCl -> FeCl2 + H2
(6) FeCl2 + 2 AgNO3 -> Fe(NO3)2 + 2 AgCl
b) Các PTHH:
(1) MnO2 + 4 HCl(đặc) -to-> MnCl2 + Cl2 + 2 H2O
(2) 3 Cl2 + 2 Fe -to-> 2 FeCl3
(3) FeCl3 + 3 NaOH -> Fe(OH)3 + 3 NaCl
(4) NaCl + H2O -ddpdddcmnx-> NaOH + 1/2 H2 + 1/2 Cl2
(5) Cl2 + Cu -to-> CuCl2
(6) CuCl2 + 2 AgNO3 -> Cu(NO3)2 + 2 AgCl
c) Các PTHH:
(1) 4 Al + 3 O2 -to-> 2 Al2O3
(2) Al2O3 + 6 HCl -> 2 AlCl3 + 3 H2O
(3) AlCl3 + 3 KOH -> 3 KCl + Al(OH)3
(4) 2 Al(OH)3 -to-> Al2O3 +3 H2O
(5) 2 Al2O3 -đpnc-> 4 Al + 3 O2
1,
\(4HCl+MnO_2\rightarrow MnCl_2+2H_2O+Cl_2\\ 2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\\ FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\\ 2NaCl+H_2SO_4\rightarrow Na_2SO_4+2HCl\uparrow\\ CuO+2HCl\rightarrow CuCl_2+H_2O\\ CuCl_2+2AgNO_3\rightarrow2AgCl\downarrow+Cu\left(NO_3\right)_2\)
2,
\(2KMnO_4+16HCl\rightarrow2KCl+8H_2O+5Cl_2+2MnCl_2\\ Cl_2+H_2\underrightarrow{as}2HCl\\ 6HCl+Fe_2O_3\rightarrow2FeCl_3+3H_2O\\ FeCl_3+3AgNO_3\rightarrow3AgCl\downarrow+Fe\left(NO_3\right)_3\\ 2AgCl\underrightarrow{as}2Ag+Cl_2\\ Cl_2+2NaBr\rightarrow2NaCl+Br_2\\ Br_2+2NaI\rightarrow2NaBr+I_2\)
3,
2 pthh đầu giống ở 2
\(Fe+2HCl\rightarrow FeCl_2+H_2\\ FeCl_2+2AgNO_3\rightarrow2AgCl\downarrow+Fe\left(NO_3\right)_2\\ 2AgCl\underrightarrow{as}2Ag+Cl_2\)
4, 2 pthh đầu gióng ở 1
\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\\ 2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
\(2KMnO_4+16HCl_{đặc,nóng}\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\\ 2Na+Cl_2\rightarrow\left(t^o\right)2NaCl\\ 2NaCl+2H_2O\rightarrow\left(dpdd.cmnx\right)2NaOH+Cl_2+H_2\\ 2NaOH+CuCl_2\rightarrow Cu\left(OH\right)_2\downarrow+2NaCl\\ Cu\left(OH\right)_2\rightarrow\left(t^o\right)CuO+H_2O\\ CuO+CO\rightarrow\left(t^o\right)Cu+CO_2\\ Cu+Cl_2\rightarrow\left(t^o\right)CuCl_2\\ CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\downarrow\)
\(KMnO_4\underrightarrow{1}Cl_2\underrightarrow{2}NaCl\underrightarrow{3}NaOH\underrightarrow{4}Cu\left(OH\right)_2\underrightarrow{5}CuO\underrightarrow{6}Cu\underrightarrow{7}CuCl_2\underrightarrow{8}cu\left(NO_3\right)_2\)
(1) \(2KMnO_4+16HCl_{đặc}\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
(2) \(2Na+Cl_2\underrightarrow{t^o}2NaCl\)
(3) \(2NaCl+2H_2O\xrightarrow[có.màng.ngăn]{điện.phân}2NaOH+H_2+Cl_2\)
(4) \(CuSO_4+2NaOH\rightarrow Cu\left(OH\right)_2+Na_2SO_4\)
(5) \(Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\)
(6) \(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
(7) \(Cu+Cl_2\underrightarrow{t^o}CuCl_2\)
(8) \(CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+AgCl\)
Chúc bạn học tốt
4Al + 3O2 \(\underrightarrow{t^o}\) 2Al2O3
Al2O3 + 6HCl -> 2AlCl3 + 3H2O
AlCl3 + 3NaOH -> Al(OH)3 + 3NaCl
2Al(OH)3 \(\underrightarrow{t^o}\) Al2O3 + 3H2O
\(\left(1\right)2Al_2O_3\xrightarrow[Na_3AlF_6]{đpnc}4Al+3O_2\uparrow\)
\(\left(2\right)2Al+3H_2SO_4--->Al_2\left(SO_4\right)_3+3H_2\uparrow\)
\(\left(3\right)Al_2\left(SO_4\right)_3+3BaCl_2--->3BaSO_4\downarrow+2AlCl_3\)
\(\left(4\right)AlCl_3+3NaOH--->Al\left(OH\right)_3\downarrow+3NaCl\)
\(MnO_2+4HCl_{đặc,nóng}\rightarrow MnCl_2+Cl_2+2H_2O\\ H_2+Cl_2\rightarrow\left(t^o\right)2HCl\\ NaOH+HCl\rightarrow NaCl+H_2O\\ 2NaCl\rightarrow\left(đpnc\right)2Na+Cl_2\\ 2Al+3Cl_2\rightarrow\left(t^o\right)2AlCl_3\\ AlCl_3+3KOH\rightarrow Al\left(OH\right)_3\downarrow+3KCl\\ Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2o\\ AlCl_3+3AgNO_3\rightarrow Al\left(NO_3\right)_3+3AgCl\downarrow\)
\(MnO_2\underrightarrow{1}Cl\underrightarrow{2}HCl\underrightarrow{3}NaCl\underrightarrow{4}Cl_2\underrightarrow{5}AlCl_3\underrightarrow{6}Al\left(OH\right)_3\underrightarrow{7}AlCl_3\underrightarrow{8}AgCl\)
(1) \(MnO_2+4HCl_{đặc}\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)
(2) \(H_2+Cl_2\xrightarrow[ánh.sáng]{t^o}2HCl\)
(3) \(NaOH+HCl\rightarrow NaCl+H_2O\)
(4) \(2NaCl+2H_2O\xrightarrow[có.màng.ngăn]{điện.phân}2NaOH+H_2+Cl_2\)
(5) \(2Al+3Cl_2\underrightarrow{t^o}2AlCl_3\)
(6) \(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)
(7) \(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)
(8) \(AlCl_3+3AgNO_3\rightarrow Al\left(NO_3\right)_3+3AgCl\)
Chúc bạn học tốt