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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 14, Problem 28E
Textbook Problem
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For each reaction, indicate which elements are oxidized and which are reduced:

a . WO 3 +3H 2 W+3H 2 O b . 2Na+Cl 2 2NaCl c . 2Fe 2 O 3 +3C 4Fe+3CO 2

Interpretation Introduction

Interpretation:

The oxidized and reduced substances for each of the given reaction are to be identified.

Concept Introduction:

Oxidation is the addition of an electronegative element or the removal of an electropositive element in a chemical reaction.

Reduction is the addition of an electropositive element or the removal of an electronegative element in a chemical reaction.

The chemical reaction in which both oxidation and reduction takes place simultaneously, is called a redox reaction.

Explanation of Solution

a) WO3+3H2W+3H2O

The equation for the reaction of WO3 with H2 is as follows:

WO3+3H2W+3H2O

Oxidation is the loss of electrons or gain of oxygen in a chemical reaction. Reduction is the gain of electrons or loss of oxygen in a chemical reaction.

W+6O32+3H20W0+3H2+1O2

In this chemical reaction, the oxidation state of H2 is increased from 0 to +1 and the gain of oxygen occurs to it. Therefore, H2 is oxidized.

In this chemical reaction, the oxidation state of W is reduced from +6 to 0 and the loss of oxygen occurs to it. Therefore, W is reduced.

b) 2Na+Cl22NaCl.

The equation for the reaction of Na with Cl is as follows:

2Na+Cl22NaCl

Oxidation is the loss of electrons or gain of oxygen in a chemical reaction. Reduction is the gain of electrons or loss of oxygen in a chemical reaction.

2Na0+Cl202Na+1Cl1

In this chemical reaction, the oxidation state of Na is increased from 0 to +1 and the loss of electrons occurs to it

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Chapter 14 Solutions

Chemistry In Focus
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