easy CHEM question~~~

KSO32- 應是 K2SO3­（或 SO32-）之誤。而 solphuric acid 應是 sulphuric acid 之誤。

Mix 的 substances 是：
一個 oxidizing agent: acidified KMnO4 (即 KMnO4 + H2SO4)
兩個 reducing agents: K2SO3 和 KI

兩個 reducing agent 會分別同個 oxidizing agent 產生 redox reactions.

K2SO3 + acidified KMnO4:
5SO32-(aq) + 2MnO4-(aq) + 6H+(aq) → 5SO42-(aq) + 2Mn2+(aq) + 3H2O(l)
The purple KMnO4 is decolorized.

KI + acidified KMnO4:
2MnO4-(aq) + 16H+(aq) + 10I-(aq) → 2Mn2+(aq) + 8H2O(l) + 5I2(aq)
The purple KMnO4 is decolorized, and a brown solution of I2 is formed.

Overall observable change:
The mixture changes from purple to brown.
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