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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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. Potassium iodide in solution reacts readily with many reagents. In the following reactions, identify the atoms that are being oxidized and reduced, and specify the oxidizing and reducing agents.

a. Cl 2 ( g ) + KI ( aq ) KCl ( aq ) + I 2 ( s )    b. 2FeCI 3 ( aq ) + 2Kl ( aq ) 2FeCl 2 ( aq ) + 2KCl ( aq ) + I 2 ( s )    c. 2CuCl 2 ( aq ) + 4Kl ( aq ) 2 CuI ( s ) + 4KCl ( aq ) + I 2 ( s )

Interpretation Introduction

Interpretation:

The atoms being oxidized and reduced, and the oxidizing and reducing agents in the given reaction should be determined.

Concept Introduction:

The oxidation state is defined as the charge(s) that an atom would have when electron(s) were transferred completely from a molecule or ion.

The element being oxidized is the one whose oxidation increases in the reaction whereas the reduced element is the one whose oxidation number decreases in the reaction.

The atom which gains electrons in the reaction that is which gets reduced in the reaction is said to be the oxidizing agent also known as the electron acceptor whereas the atom which loses electrons in the reaction that is which gets oxidized in the reaction is said to be the reducing agent also known as the electron donor.

Explanation

Given:

Cl2g + KIaq  KClaq+I2(s)

The oxidation state is defined as the charge(s) that an atom would have when electron(s) were transferred completely from a molecule or ion.

While determining the oxidation state of compound, the element with greater electronegativity is assigned with negative value of oxidation state which is equal to the charge as an anion in ionic compounds and element whose oxidation states are fixed are assigned. For compounds with no charge, the sum of oxidation states is zero.

The oxidation states are determined as:

Since, Cl2 and I2 are in its stable elemental state so; the oxidation state of Cl2 and I2 is zero for KI and KCl the oxidation is determined as:

For KI:

The oxidation state of K is assigned as + 1 and the oxidation state of I is assigned as x:

Since, KI has no charge so; the sum of oxidation state must be zero

Interpretation Introduction

Interpretation:

The atoms being oxidized and reduced, and the oxidizing and reducing agents in the given reaction should be determined.

Concept Introduction:

The oxidation state is defined as the charge(s) that an atom would have when electron(s) were transferred completely from a molecule or ion.

The element being oxidized is the one whose oxidation increases in the reaction whereas the reduced element is the one whose oxidation number decreases in the reaction.

The atom which gains electrons in the reaction that is which gets reduced in the reaction is said to be the oxidizing agent also known as the electron acceptor whereas the atom which loses electrons in the reaction that is which gets oxidized in the reaction is said to be the reducing agent also known as the electron donor.

Interpretation Introduction

Interpretation:

The atoms being oxidized and reduced, and the oxidizing and reducing agents in the given reaction should be determined.

Concept Introduction:

The oxidation state is defined as the charge(s) that an atom would have when electron(s) were transferred completely from a molecule or ion.

The element being oxidized is the one whose oxidation increases in the reaction whereas the reduced element is the one whose oxidation number decreases in the reaction.

The atom which gains electrons in the reaction that is which gets reduced in the reaction is said to be the oxidizing agent also known as the electron acceptor whereas the atom which loses electrons in the reaction that is which gets oxidized in the reaction is said to be the reducing agent also known as the electron donor.

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