# Chapter 18 - Electrochemistry - Worked Example - Page 760: 1

a)$MnO_{4}^{-}(aq)+3e^{-} \rightarrow MnO_{2}(s)$ , $IO_{3}^{-}(aq) \rightarrow IO_{4}^{-}(aq)+2e^-$ b)$NO_{3}^{-}(aq)+e^- \rightarrow NO_{2}(g)$ , $SO_{2}(aq) \rightarrow SO_{4}^{-}(aq)+3e^-$

#### Work Step by Step

a)$Mn$ is reduced from 7+ to 4+ and $I$ is oxidized from 5+ to 7+ b)$N$ is reduced from 5+ to 4+ and $S$ is oxidized from 4+ to 7+

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