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Which of the following reactions are oxidation-reduction reactions? 1. NaOH(aq) + HNO 3 (aq) → NaNO 3 (aq) + H 2 O( l ) 2. Cu(s) + Cl 2 (g) → CuC1 2 (s) 3. Na 2 CO 3 (aq) + 2 HClO 3 (aq) → CO 2 (g) + H 2 O( l ) + 2 NaCl 4 (aq) 4. 2S 2 O 3 2− (aq) + l 2 (aq) → S 4 O 6 2− (aq) + 2l−(aq) (a) all of them (b) 2, 3, and 4 (c) 2 and 4 (d) 2 only

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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 3.8, Problem 2RC
Textbook Problem
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Which of the following reactions are oxidation-reduction reactions?

  1. 1. NaOH(aq) + HNO3(aq) → NaNO3(aq) + H2O(l)
  2. 2. Cu(s) + Cl2(g) → CuC12(s)
  3. 3. Na2CO3(aq) + 2 HClO3(aq) → CO2(g) + H2O(l) + 2 NaCl4(aq)
  4. 4. 2S2O32−(aq) + l2(aq) → S4O62−(aq) + 2l−(aq)
  5. (a) all of them
  6. (b) 2, 3, and 4
  7. (c) 2 and 4
  8. (d) 2 only

Interpretation Introduction

Interpretation:

The oxidation – reduction reaction should be identified.

Concept introduction:

Oxidation - reduction reaction: The electrons are transferred to one to other is called oxidation reduction reaction.

An oxidizing agent gains the electrons and is reduced in a chemical reaction and it is electron acceptor.

A reducing agent loses electrons and is oxidized in a chemical reaction and it is electron donor.

The oxidation state is called as oxidation number, which describes degree of oxidation (loss of electrons) of an atom in a chemical compound. Theoretically, the oxidation state is positive, negative or zero.

Explanation of Solution

(a)

The oxidation – reduction reaction is given below,

CuS(s) + Cl2(g)  CuCl2(s)

In this reaction the oxidation state of chlorine is zero in the reactant where as 1 in the product. Therefore it is comes under oxidation – reduction reaction

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Chapter 3 Solutions

Chemistry & Chemical Reactivity
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Ch. 3.5 - In each of the following cases, aqueous solutions...Ch. 3.5 - Aqueous solutions of the two reactants listed...Ch. 3.5 - What is the net ionic equation for the reaction of...Ch. 3.6 - (a) Write a balanced equation for the reaction...Ch. 3.6 - Write the balanced, overall equation and the net...Ch. 3.6 - Which of the following is a strong add in aqueous...Ch. 3.6 - 2. The hydrogen phosphate ion is amphiprotic....Ch. 3.6 - What is the net ionic equation for the reaction of...Ch. 3.6 - Identify the basic oxide from those listed below....Ch. 3.7 - Barium carbonate, BaC0)3, is used in the brick,...Ch. 3.7 - Which of the following compounds, when treated...Ch. 3.8 - Assign an oxidation number to the underlined atom...Ch. 3.8 - The following reaction is used in a device for...Ch. 3.8 - 1. What is the oxidation number of Mn in...Ch. 3.8 - 2. Which of the following reactions are...Ch. 3.8 - 3. 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