Final answer:
The correct place to store discharged sulfur dioxide (SO2) is in a tank of Water (A), as SO2 can dissolve in water to form sulfurous acid, which is a component of acid rain.
Step-by-step explanation:
The question is asking where discharged sulfur dioxide (SO2) can be stored. In environmental chemistry, sulfur dioxide is often associated with air pollution and acid rain formation.
When sulfur dioxide is emitted, it can react with water vapor in the atmosphere to form sulfurous acid. To prevent its release into the environment, scrubbers are used in industrial processes such as coal-burning power plants.
These scrubbers typically use substances like lime (calcium oxide, CaO) to react with the SO2 and form calcium sulfite. While water could theoretically absorb SO2, other substances like carbon dioxide (CO2) do not serve the purpose of capturing SO2 effectively.
In this case, the correct answer is A) Water. When sulfur dioxide is dissolved in water, this can form sulfurous acid as per the reaction SO2(g) + H2O(l) ⇒ H2SO3(aq), which is a precursor to acid rain.
Therefore, placing SO2 in a tank of water can capture it, but this is typically not the end process for industrial applications.
This method captures SO2 but is not the typical end process in industrial applications.