One method of reducing acid rain is "scrubbing" the...

One method of reducing acid rain is "scrubbing" the combustion products before they are emitted from power plant smoke stacks. The process involves addition of an aqueous suspension of lime $(\mathrm{CaO})$ to the combustion chamber and stack, where the lime reacts with $\mathrm{SO}_{2}$ to give calcium sulfite $\left(\mathrm{CaSO}_{3}\right): \mathrm{CaO}(a q)+\mathrm{SO}_{2}(g) \longrightarrow \mathrm{CaSO}_{3}(a q)$ (a) How much lime (in grams) is needed to remove $1 \mathrm{~mol}$ of $\mathrm{SO}_{2} ?$ (b) How much lime (in kilograms) is needed to remove $1 \mathrm{~kg}$ of $\mathrm{SO}_{2} ?$

One method of reducing acid rain is "scrubbing" the combustion products before they are emitted from power plant smoke stacks. The process involves addition of an aqueous suspension of lime $(\mathrm{CaO})$ to the combustion chamber and stack, where the lime reacts with $\mathrm{SO}_{2}$ to give calcium sulfite $\left(\mathrm{CaSO}_{3}\right): \mathrm{CaO}(a q)+\mathrm{SO}_{2}(g) \longrightarrow \mathrm{CaSO}_{3}(a q)$
(a) How much lime (in grams) is needed to remove $1 \mathrm{~mol}$ of $\mathrm{SO}_{2} ?$
(b) How much lime (in kilograms) is needed to remove $1 \mathrm{~kg}$ of $\mathrm{SO}_{2} ?$

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Key Concepts

Stoichiometry

Stoichiometry involves using a balanced chemical equation to relate the quantities of reactants and products in a chemical reaction. This concept is key for calculating how much of one substance is needed to react completely with a given amount of another substance.

Mole Concept

The mole is a fundamental unit in chemistry that represents a specific number of particles. It serves as a bridge between the atomic scale and measurable quantities, allowing chemists to convert between mass and the number of molecules or atoms using molar masses.

Molar Mass and Unit Conversion

Molar mass is the mass of one mole of a substance and is used to convert between moles and grams. Unit conversion is also critical, as it ensures that quantities are expressed in the correct units (for example, converting grams to kilograms) for practical applications.

Environmental Pollution Control through Chemical Reactions

Environmental pollution control uses chemical reactions to mitigate the effects of harmful emissions. By reacting pollutants with suitable chemicals, the process transforms toxic compounds into less harmful forms, thereby reducing environmental damage.

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