Question
One of the problems with roasting sulfide ores is the air pollution caused by the gas that is produced. Describe some consequences of releasing this gas into the atmosphere.
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This is because sulfur dioxide is a strong irritant, capable of causing inflammation and discomfort in the respiratory tract. Show more…
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Name the undesirable gaseous product formed during the roasting of copper and other sulfide ores. Why is it undesirable?
Many metals occur naturally as sulfide compounds; examples include $\mathrm{ZnS}$ and $\mathrm{CoS}$. Air pollution often accompanies the processing of these ores, because toxic sulfur dioxide is released as the ore is converted from the sulfide to the oxide by roasting (smelting). For example, consider the unbalanced equation for the roasting reaction for zinc: $$\mathrm{ZnS}(s)+\mathrm{O}_{2}(g) \rightarrow \mathrm{ZnO}(s)+\mathrm{SO}_{2}(g)$$ How many kilograms of sulfur dioxide are produced when $1.0 \times 10^{2} \mathrm{kg}$ of $\mathrm{ZnS}$ is roasted in excess oxygen by this process?
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