Chlorine gas was first prepared in 1774 by C. W. Scheele by...

Chlorine gas was first prepared in 1774 by C. W. Scheele by oxidizing sodium chloride with manganese(IV) oxide. The reaction is $\mathrm{NaCl}(a q)+\mathrm{H}_{2} \mathrm{SO}_{4}(a q)+\mathrm{MnO}_{2}(s) \longrightarrow$ $\mathrm{Na}_{2} \mathrm{SO}_{4}(a q)+\mathrm{MnCl}_{2}(a q)+\mathrm{H}_{2} \mathrm{O}(l)+\mathrm{Cl}_{2}(g)$ Balance this equation.

Chlorine gas was first prepared in 1774 by C. W. Scheele by oxidizing sodium chloride with manganese(IV) oxide. The reaction is $\mathrm{NaCl}(a q)+\mathrm{H}_{2} \mathrm{SO}_{4}(a q)+\mathrm{MnO}_{2}(s) \longrightarrow$
$\mathrm{Na}_{2} \mathrm{SO}_{4}(a q)+\mathrm{MnCl}_{2}(a q)+\mathrm{H}_{2} \mathrm{O}(l)+\mathrm{Cl}_{2}(g)$ Balance this equation.

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Key Concepts

Law of Conservation of Mass

This principle states that matter is neither created nor destroyed in a chemical reaction, meaning the total mass of the reactants must equal the total mass of the products. When balancing chemical equations, this law ensures that the number of atoms for each element is the same on both sides of the equation.

Chemical Equation Balancing

This process involves adjusting the stoichiometric coefficients of reactants and products so that the same number of atoms for each element appears on both sides of the chemical equation. It is essential for accurately representing a chemical reaction and obeying the law of conservation of mass.

Stoichiometry

Stoichiometry is the quantitative study of reactants and products in a chemical reaction. It involves using ratios derived from balanced chemical equations to calculate the amounts of substances consumed and produced, ensuring that the proportions are consistent with the reaction's overall mass and energy balance.

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