(Solved): Unit 5: Electrochemistry Activity 1: Electrons - It's a Game of Give and Take Oxidation-Reduction P ...

Unit 5: Electrochemistry Activity 1: Electrons - It's a Game of Give and Take Oxidation-Reduction Part A - Assign an oxidation number to the underlined element in each compound. (Knowledge marks \( =5) \) i) \( \underline{\mathrm{O} 2} \) ii) \( \underline{A s} 2 S 5 \) iii) \( \mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O7} \) iv) \( \mathrm{HAsO}^{2} \) v) \( \mathrm{NaBrO} 3 \) Part B - Balance the following redox reaction in an acidic solution, using the half-reaction method. \[ \begin{array}{l} \mathrm{BrO} 3-(\mathrm{aq})+\mathrm{NO} 2(\mathrm{aq}) \text { à } \mathrm{Br}-(\mathrm{aq})+ \\ \mathrm{NO} 3-(\mathrm{aq}) \end{array} \]