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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

The thermite reaction produces iron metal and aluminum oxide from a mixture of powdered aluminum metal and iron(III) oxide (page 172).

FezO3(s) + 2 Al(s) → 2 Fe(l) + Al2O3)

A mixture of 50.0 g each of Fe2O3, and Al is used. Which is the limiting reactant? What mass of iron metal can be produced?

Interpretation Introduction

Interpretation:

The limiting reactant and the mass of iron metal produced in the given reaction has to be determined.

Concept introduction:

Limiting reagent: limiting reagent is a reactant, which consumes completely in the chemical reaction. The quantity of the product depends on this limiting reagent, it can be determined with the help of balanced chemical equation for the reaction.

For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.

Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.

Explanation

Balanced chemical equation for the given reaction is,

  Fe2O3(s)+2Al(s)2Fe(l)+Al2O3(s)

The mass of iron metal produced can be determined by considering the amount of substance in both the reactant Fe2O3andAl

Therefore the mass of iron metal produced is,

  50gAl×1molAl26.98gAl×2molFe2molAl×55

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