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2Сa+O2 = 2CaO                            2Cr(OH)3 = Cr2O3 + 3H2O

K2O + H2O = 2KOH                      CH4 +2 O2 = CO2 + 2H2O

2K+Cl2 = 2KCl                               2H3PO4 = P2O5 +3 H2O

CO2 + H2O = H2CO3                   Cl2O7 + H2O =2 HClO4

2HgO = 2Hg + O2                        Al2O3 + 3H2 = 3H2O + 2Al

2Na+Cl2 = 2NaCl                         AlCl3 + 3KOH = Al(OH)3 +3 KCl                 

2Cu+O2=2CuO                            2Fe(OH)3 = Fe2O3 + 3H2O

2Fe+3Cl2 = 2FeCl3                    2KJ + Br2 = J2 + 2KBr

2H2O=2H2+O2                           2ZnS +3 O2 =2 ZnO + 2SO2

Na2O + H2O = 2NaOH                 CuCl2 + 2KOH = Cu(OH)2 + 2KCl

2NH3 = N2+3H2                                 CaO + 2HCl = CaCl2 + H2O

2Na + H2SO4 = Na2SO4 + H2          4P+5O2 =2 P2O5

4Al + 3O2 = 2Al2O3                           Zn + 2HCl = ZnCl2 + H2

2KBr + Cl2 = 2KCl + Br2                    SiH4 + 2O2 = SiO2 +2 H2O

MgO + 2HCl=MgCl2 + H2O              2Na + 2H2O = 2NaOH + H2