Question

1.             Na   +   H₂O   - - >                                                     15. BaO +  H₂O  - ->

2.             H₂      +  CuO   - ->                                                     16. H₂      +   Cl₂     - ->

3.             H₂      +    O₂    - ->                                                      17. P₂O₅ +  H₂O   - ->

4.             KMnO₄ - - - >                                                            18. KClO₃ - - - >

5.             Al + H₂SO₄ l - - - >                                                   19. Fe + O₂ - - - >

6.             H₂      +  Fe₂O₃   - ->                                                   20. KNO₃ - - - >

7.             Al    +   O₂      - ->                                                      21. H₂  +  PbO  - - - >

8.             H₂O  - ->                                                                    22. Na₂O  +   H₂O - - - >

9.             K  +  H₂O - ->                                                           23. K₂O  +   H₂O - - - >

10.          CaO +  H₂O  - ->                                                      24. CO₂   +   H₂O - ->

11.         SO₃   +   H₂O - ->                                                      25. Zn + HCl - ->

12.          SO₂   +   H₂O - ->                                                     26. Fe + HCl - ->

13.         Ca + H₂O  - ->                                                           27. Fe + H₂SO₄ - ->

14.         S + O₂ - ->                                                                 28. Ba  +  H₂O - ->  

Answer 1

\(Na+H_2O\rightarrow NaOH+\dfrac{1}{2}H_2\\ H_2+CuO\underrightarrow{t^o}H_2O+Cu\\ 2H_2+O_2\underrightarrow{t^o}2H_2O\\ 2KMnO_4\underrightarrow{t^o}K_2MnO_4+MnO_2+O_2\\ 2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ 3H_2+Fe_2O_3\underrightarrow{t^o}2Fe+3H_2O\\ 4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)   
\(2H_2O\underrightarrow{\text{đ}p}2H_2+O_2\\ K+H_2O\rightarrow KOH+\dfrac{1}{2}H_2\\ CaO+H_2O\rightarrow Ca\left(OH\right)_2\\ SO_3+H_2O\rightarrow H_2SO_4\\ SO_2+H_2O\rightarrow H_2SO_3\\ Ca+2H_2O\rightarrow Ca\left(OH\right)_2+H_2\\ S+O_2\underrightarrow{t^o}SO_2\\ BaO+H_2O\rightarrow Ba\left(OH\right)_2\\ H_2+Cl_2\underrightarrow{t^o}2HCl\\ P_2O_5+3H_2O\rightarrow2H_3PO_4\\ 2KClO_3\xrightarrow[xtMnO_2]{t^o}2KCl+3O_2\)  
\(3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\\ 2KNO_3\underrightarrow{t^o}2KNO_2+O_2\\ H_2+PbO\underrightarrow{t^o}Pb+H_2O\\ Na_2O+H_2O\rightarrow NaOH\\ K_2O+H_2O\rightarrow2KOH\\ CO_2+H_2O\rightarrow H_2CO_3\\ Zn+2HCl\rightarrow ZnCl_2+H_2\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ Fe+H_2SO_4\rightarrow FeSO_4+H_2\\ Ba+2H_2O\rightarrow Ba\left(OH\right)_2+H_2\)