Iron metal can be produced from the mineral hematite, Fe2O3, by reaction with carbon. How many kilograms of iron are present in 105 kg of hematite?

검증된 단계별 안내

Identify the chemical reaction: \( \text{Fe}_2\text{O}_3 + 3\text{C} \rightarrow 2\text{Fe} + 3\text{CO} \).

Calculate the molar mass of \( \text{Fe}_2\text{O}_3 \) using the atomic masses of Fe and O.

Determine the molar mass of iron (Fe).

Use stoichiometry to find the moles of iron produced from 1 mole of \( \text{Fe}_2\text{O}_3 \).

Convert the mass of \( \text{Fe}_2\text{O}_3 \) (105 kg) to moles, then use the stoichiometric ratio to find the mass of iron produced.

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영상 길이:

주요 개념

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Stoichiometry

Stoichiometry is the branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It allows us to calculate the amounts of substances consumed and produced in a reaction based on balanced chemical equations. Understanding stoichiometry is essential for determining how much iron can be produced from a given mass of hematite.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For hematite (Fe2O3), the molar mass can be calculated by summing the atomic masses of its constituent elements: iron (Fe) and oxygen (O). Knowing the molar mass is crucial for converting between mass and moles, which is necessary for stoichiometric calculations.

Reduction Reaction

A reduction reaction involves the gain of electrons or a decrease in oxidation state by a substance. In the context of producing iron from hematite, carbon acts as a reducing agent, converting Fe2O3 to iron (Fe) by removing oxygen. Understanding reduction reactions is vital for grasping how iron is extracted from its ore and the overall chemical process involved.