Mn goes from +7 to +4 for a loss of 3, and S goes from +4 to +6 for a gain of 2. You need 2 Mn per 3 S.
In basic solution, you form base and react with water in most cases.
2KMnO4(aq) + 3Na2SO3(aq) + H2O(l) → 2MnO2(s) + 3Na2SO4(aq) + 2KOH(aq)
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Mn goes from +7 to +4 for a loss of 3, and S goes from +4 to +6 for a gain of 2. You need 2 Mn per 3 S.
In basic solution, you form base and react with water in most cases.
2KMnO4(aq) + 3Na2SO3(aq) + H2O(l) → 2MnO2(s) + 3Na2SO4(aq) + 2KOH(aq)