I have to solve the following redox reaction which occurs in an acidic environment, using the half-equation method.
$$\ce {Bi2S3_{(s)} + NO3-_{(aq)} -> BiO3-_{(aq)} + SO4^2-_{(aq)} + NO_{(g)}}$$
There seems to be a lot elements that change their oxidation numbers, except for oxygen:
- $\ce{Bi}$ from $\ce{+III}$ to $\ce{+V}$
- $\ce{S}$ from $\ce{-II}$ to $\ce{+VI}$
- $\ce{N}$ from $\ce{+V}$ to $\ce{+II}$
What should I begin with? How would one go about grouping three redox pairs?