Question
a. $\mathrm{Bi}_2 \mathrm{O}_3$ is treated with $\mathrm{HNO}_3$. Write balanced equation for the reaction.
b. Why does Bismuth not form pentahalide?

Answer

  1. $\text{BI}_2\text{O}_3+6\text{HNO}_3\xrightarrow{\ \ \ \ \ \ \ \ \ \ }2\text{Bi}(\text{NO}_3)_3+3\text{H}_2\text{O}$
  2. $\mathrm{Bi}^{3+}$ is more stable than $\mathrm{Bi}^{5+}$, therefore Bismuth does not penta$-$halide.

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