____Mn2+ +____BiO3- + ____H+ → 2MnO4- + ____Bi3+ + ____H2O ;
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____H3AsO3+____I2+ ____ → ____HAsO42-+____I-+____H+;
____I-+ ____O2+ ____H+→____ I2+ ____;
____KMnO4+____K2SO3+____ → ____MnO2+____K2SO4+____ KOH;
____MnO4-+____H2C2O4+____H+→ ____Mn2++____CO2+____;