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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

Write balanced chemical equations for the following reactions.

(a) The reaction of aluminum and iron(III) oxide to form iron and aluminum oxide (known as the thermite reaction).

(b) The reaction of carbon and water at high temperature to form a mixture of gaseous CO and H2 (known as water gas and once used as a fuel).

(c) The reaction of liquid silicon tetrachloride and magnesium forming silicon and magnesium chloride. This is one step in the preparation of ultrapure silicon used in the semiconductor industry

(a)

Interpretation Introduction

Interpretation:

The balanced chemical equation for given reaction should be written.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

Explanation

Aluminium and iron(III) oxide reacts together and  produces liquid iron and aluminum oxide which is highly exothermic reaction. The unbalanced equation is given below using correct molecular formula, the given reaction aluminium reduces the oxide of iron.

  

Balance the aluminum atom in the given equation, when balancing the equation, we should not alter the subscripts and we can change coefficients.

There is one aluminium in the left side and two aluminium in the right side. Therefore according to the aluminium atom the balanced equation is given below.

  

(b)

Interpretation Introduction

Interpretation:

The balanced chemical equation for given reaction should be written.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

(c)

Interpretation Introduction

Interpretation:

The balanced chemical equation for given reaction should be written.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

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