Iron(III) oxide reacts with carbon monoxide according to the...

Iron(III) oxide reacts with carbon monoxide according to the equation: $$\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{CO}(g) \longrightarrow 2 \mathrm{Fe}(s)+3 \mathrm{CO}_{2}(g)$$ A reaction mixture initially contains 22.55 $\mathrm{g} \mathrm{Fe}_{2} \mathrm{O}_{3}$ and 14.78 $\mathrm{gCO}$ . Once the reaction has occurred as completely as possible, what mass (in $\mathrm{g} )$ of the excess reactant remains?

Iron(III) oxide reacts with carbon monoxide according to the equation:
$$\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{CO}(g) \longrightarrow 2 \mathrm{Fe}(s)+3 \mathrm{CO}_{2}(g)$$
A reaction mixture initially contains 22.55 $\mathrm{g} \mathrm{Fe}_{2} \mathrm{O}_{3}$ and 14.78 $\mathrm{gCO}$ .
Once the reaction has occurred as completely as possible, what mass
(in $\mathrm{g} )$ of the excess reactant remains?

Key Concepts

Limiting Reactant

The limiting reactant is the substance that is completely consumed first during a chemical reaction, thereby limiting the amount of products formed. Identifying the limiting reactant is essential for predicting the maximum yield and determining the quantities of remaining reactants after the reaction.

Balanced Chemical Equation

A balanced chemical equation is a representation of a chemical reaction that shows the correct stoichiometric proportions of reactants and products. It ensures that the number of atoms for each element is consistent on both sides of the diagram, which is essential for calculating the precise amounts in which substances react or are produced.

Molar Mass and Conversion

Molar mass is the mass of one mole of a substance and is used to convert between the mass of a substance and the number of moles. This conversion is crucial in stoichiometry for determining how many particles are involved in a reaction, since reactions occur based on mole-to-mole interactions.

Stoichiometry

Stoichiometry involves using the balanced chemical equation to determine the relationships between the amounts of reactants and products. It allows one to calculate the required or resultant quantities of substances, based on their mole ratios in the balanced equation.

Excess Reactant Calculation

Excess reactant calculation involves determining the amount of reactant left over after the reaction has reached completion. Once the limiting reactant has been fully used, the remaining moles of the other reactants are calculated using the initial moles and the stoichiometric ratios from the balanced equation.

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