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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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Exercise 18.1 For the following identify the element oxidized and the element reduced.

a. 2Cu ( s ) + O 2 ( g )  2CuO ( s )

b. 2Cs ( s ) +  F 2 ( g ) 2CsF ( 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)+O2(g)2CuO(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)+O2(g)2CuO(s)

Here, CuO copper oxide contains Cu2+ and O2- ions.

In reaction, oxidation state of copper increases that are from 0 to + 2 by losing two electrons and oxidation of state of oxygen decreases that are from 0 to -2 by gaining two electrons

Interpretation Introduction

(b)

Interpretation:

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

2Cs(s)+F(g)2CsF(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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