Cách 1:
1. \(2Cu+O_2\xrightarrow[]{t^o}2CuO\)
2. \(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
3. \(2HgO\xrightarrow[]{t^o}2Hg+O_2\)
4. \(Fe_3O_4+4H_2SO_4\rightarrow FeSO_4+Fe_2\left(SO_4\right)_3+4H_2O\)
5. \(K_2O+H_2O\rightarrow2KOH\)
6. \(3KOH+AlCl_3\rightarrow Al\left(OH\right)_3\downarrow+3KCl\)
7. \(3Fe+2O_2\xrightarrow[]{t^o}Fe_3O_4\)
8. \(MgSO_4+2NaOH\rightarrow Mg\left(OH\right)_2\downarrow+Na_2SO_4\)
9. \(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)
10. \(FeO+H_2\xrightarrow[]{t^o}Fe+H_2O\)
11. \(Mg+2AgNO_3\rightarrow Mg\left(NO_3\right)_2+2Ag\)
12. \(CaCO_3+2HCl\rightarrow CaCl_2+CO_2\uparrow+H_2O\)
13. \(S+O_2\xrightarrow[]{t^o}SO_2\)
14. \(Fe+2HCl\rightarrow FeCl_2+H_2\)
15. \(Al_2O_3+2H_3PO_4\rightarrow AlPO_4\downarrow+3H_2O\)
16. \(MgSO_4+2KOH\rightarrow Mg\left(OH\right)_2\downarrow+K_2SO_4\)
17. \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
18. \(Fe_2O_3+3H_2\xrightarrow[]{t^o}2Fe+3H_2O\)
19. \(Mg+Cu\left(NO_3\right)_2\rightarrow Mg\left(NO_3\right)_2+Cu\downarrow\)
20. \(FeS+2HCl\rightarrow FeCl_2+H_2S\uparrow\)
21. \(Mg+H_2SO_4\rightarrow MgSO_4+H_2\)
22. \(2NaCl+2H_2O\xrightarrow[cmn]{đpdd}2NaOH+Cl_2+H_2\)
23. \(K_2SO_4+BaCl_2\rightarrow BaSO_4\downarrow+2KCl\)
Cách 4:
1. \(2A+2aHCl\rightarrow2ACl_a+aH_2\)
2. \(3A_2O_a+2aH_3PO_4\rightarrow2A_3\left(PO_4\right)_a+3aH_2O\)
3. \(4FeS_2+11O_2\xrightarrow[]{t^o}2Fe_2O_3+8SO_2\)
4. \(3CuCl_2+2Al\rightarrow2AlCl_3+3Cu\downarrow\)
5. \(ACl_a+aAgNO_3\rightarrow aAgCl\downarrow+A\left(NO_3\right)_a\)
6. \(A_xO_y+2yHCl\rightarrow xACl_{2y/x}+yH_2O\)
7. \(A_xO_y+yH_2SO_4\rightarrow A_x\left(SO_4\right)_y+yH_2O\)
8. \(3A_xO_y+2yH_3PO_4\rightarrow A_{3x}\left(PO_4\right)_{2y}+3yH_2O\)
9. \(2B\left(OH\right)_a+aH_2SO_4\rightarrow B_2\left(SO_4\right)_a+2aH_2O\)
10. \(3Pb\left(NO_3\right)_2+Al_2\left(SO_4\right)_3\rightarrow2Al\left(NO_3\right)_3+3PbSO_4\downarrow\)
11. \(6NaOH+Al_2\left(SO_4\right)_3\rightarrow2Al\left(OH\right)_3\downarrow+3Na_2SO_4\)
12. \(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)
13. \(3Ba\left(NO_3\right)_2+Al_2\left(SO_4\right)_3\rightarrow2Al\left(NO_3\right)_3+3BaSO_4\downarrow\)
14. \(K_2CO_3+2HNO_3\rightarrow2KNO_3+CO_2\uparrow+H_2O\)
15. \(ACl_a+aAgNO_3\rightarrow aAgCl\downarrow+A\left(NO_3\right)_a\)
16. \(2A\left(OH\right)_a+aH_2SO_4\rightarrow A_2\left(SO_4\right)_a+2aH_2O\)
17. \(3Pb\left(NO_3\right)_2+Al_2\left(SO_4\right)_3\rightarrow2Al\left(NO_3\right)_3+3PbSO_4\downarrow\)
18. \(3Ba\left(OH\right)_2+Al_2\left(SO_4\right)_3\rightarrow2Al\left(OH\right)_3\downarrow+3BaSO_4\downarrow\)
19. \(3BaSO_3+2H_3PO_4\rightarrow Ba_3\left(PO_4\right)_2\downarrow+3SO_2\uparrow+3H_2O\)
20. \(A_2O_n+2nHCl\rightarrow2ACl_n+nH_2O\)
21. \(2A\left(OH\right)_a+aH_2SO_4\rightarrow A_2\left(SO_4\right)_a+2aH_2O\)
22. \(3A\left(OH\right)_a+aH_3PO_4\rightarrow A_3\left(PO_4\right)_a+3aH_2O\)
23. \(A_2\left(CO_3\right)_a+2aHCl\rightarrow2ACl_a+aCO_2\uparrow+aH_2O\)
24. \(2A_3\left(PO_4\right)_a+3aNa_2CO_3\rightarrow3A_2\left(CO_3\right)_a+2aNa_3PO_4\)
