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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. In each of the following reactions, identify which element is being oxidized and which is being reduced by assigning oxidation states.

a. 2Cu ( s ) + S ( s ) Cu 2 S ( s ) b. 2Cu 2 O ( s ) + O 2 ( g ) 4CuO ( s )    C. 4B ( s ) + 3O 2 ( g ) 2B 2 O 3 ( s )    d. 6Na ( s ) + N 2 ( g ) 2 Na 3 N ( s )

Interpretation Introduction

(a)

Interpretation:

The element which one is oxidized and which one is reduced should be identified in the given reaction.

2Cu(s)+S(s)Cu2S(s).

Concept Introduction:

The chemical reaction in which both oxidation and reduction process takes place is known as redox reaction. In this reaction, transfer of electrons takes place among the elements.

Oxidation is the process in which either loss of electrons, oxidation number increases, or loss of hydrogen atoms takes place. An element is oxidized, when oxidation number increases.

Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.

Explanation

The given reaction is:

2Cu(s)+S(s)Cu2S(s)

Here, Cu2S contains Cu+ and S2- ions.

In reaction, oxidation state of copper increases that are from 0 to + 1 by losing electron and oxidation of state of sulfur decreases that are from 0 to -2 by gaining electron

Interpretation Introduction

(b)

Interpretation:

The element which one is oxidized and which one is reduced should be identified in the given reaction.

2Cu2O(s)+O2(g)4CuO(s).

Concept Introduction:

The chemical reaction in which both oxidation and reduction process takes place is known as redox reaction. In this reaction, transfer of electrons takes place among the elements.

Oxidation is the process in which either loss of electrons, oxidation number increases, or loss of hydrogen atoms takes place. An element is oxidized, when oxidation number increases.

Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.

Interpretation Introduction

(c)

Interpretation:

The element which one is oxidized and which one is reduced should be identified in the given reaction.

4B(s)+3O2(g)2B2O3(s).

Concept Introduction:

The chemical reaction in which both oxidation and reduction process takes place is known as redox reaction. In this reaction, transfer of electrons takes place among the elements.

Oxidation is the process in which either loss of electrons, oxidation number increases, or loss of hydrogen atoms takes place. An element is oxidized, when oxidation number increases.

Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.

Interpretation Introduction

(d)

Interpretation:

The element which one is oxidized and which one is reduced should be identified in the given reaction.

6Na(s)+N2(g)2Na3N(s).

Concept Introduction:

The chemical reaction in which both oxidation and reduction process takes place is known as redox reaction. In this reaction, transfer of electrons takes place among the elements.

Oxidation is the process in which either loss of electrons, oxidation number increases, or loss of hydrogen atoms takes place. An element is oxidized, when oxidation number increases.

Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.

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