Bismuth is an element in Group 15 of the Periodic Table. $$\(\mathrm{Bi}_{2} \mathrm{O}_{3}\)$$ can be used to form $$\(\mathrm{NaBiO}_{3}\)$$, as shown in equation 1 . equation 1 $$\[ \mathrm{Na}_{2} \mathrm{O}+\mathrm{Bi}_{2} \mathrm{O}_{3}+\mathrm{O}_{2} \rightarrow 2 \mathrm{NaBiO}_{3} \]$$ (i) Deduce the oxidation number of Bi in $$\(\mathrm{Bi}_{2} \mathrm{O}_{3}\)$$ and in $$\(\mathrm{NaBiO}_{3}\)$$. oxidation number of Bi : in $$\(\mathrm{Bi}_{2} \mathrm{O}_{3}\)$$ ............................................. in $$\(\mathrm{NaBiO}_{3}\)$$ ....................................................... .. (ii) Identify the reducing agent in equation 1 . .................................................................................................................................

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