Oksidlanish-qaytarilish reaksiyalarining turlari

_{+                              2+}      

                               MnO₄   +    8H +5e  ®   Mn   +   4H₂O      2

                                                          _{-                                                           -                     +}

                               NO₂    +     H₂O  -2e®  NO₃   +    2H         5

                 Bu reaksiyalardagi strelkalarni tenglik ishorasiga aylantirish uchun  o’ng va     chap  tomondagi zaryadlar sonini tenglashtirish kerak. 

                                 _{-        +                  2+}

                         MnO₄+H+5e=Mn+4H₂O

                                _{-                                 -              +}