A、S₂O₈^2-+Mn²⁺======MnO₄^-+2SO₄2-

B、S₂O₈^2-+Mn²⁺+8OH^-========MnO₄^-+2SO₄^2-+4H₂O

C、S₂O₈^2-+Mn²⁺+4H₂O========MnO₄^-+2SO₄^2-+8H⁺                                           Ag⁺

D、5S₂O₈^2-+2Mn²⁺+8H₂O===========2MnO₄^-+10SO₄^2-+16H⁺