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When balancing aqueous redox reactions in basic media,

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 16Q Chapter 16

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 16Q

When balancing aqueous redox reactions in basic media, hydrogen ions are neutralized using _____.

Step-by-Step Solution:
Step 1 of 3

Solution: Here, we are going to fill in the blank.

Step1:

Redox reactions are the reactions in which oxidation(loss of electrons) and reduction(gain of electrons) occurs simultaneously. While balancing the redox reaction, several steps are followed:

Suppose we are to balance the equation showing the oxidation of Fe2+ ions to Fe3+ ions by dichromate ions (Cr2O7)2– in acidic medium, wherein, (Cr2O7)2– ions are reduced to Cr3+ ions. The following steps are involved in this task.

 Produce unbalanced equation for the reaction in ionic form :

 Fe2+(aq) + (Cr2O7)2– (aq) → Fe3+ (aq) + Cr3+(aq)

Separate the equation into half reactions:

 Oxidation half : Fe2+ (aq) → Fe3+(aq)

        Reduction half : (Cr2O7)2–(aq) → Cr3+(aq)

Balance the atoms other than O and H in each half reaction individually. Here the oxidation half reaction is already balanced with respect to Fe atoms. For the reduction half reaction, we multiply the Cr3+ by 2 to balance Cr atoms

(Cr2O7)2–(aq) → 2Cr3+(aq)

For reactions occurring in acidic medium, add H2O to balance O atoms and H+ to balance H atoms. Thus, we get :

(Cr2O7)2– (aq) + 14H+ (aq) → 2Cr3+(aq) + 7H2O

Add electrons to one side of the half reaction to balance the charges. If need be, make the number of electrons equal in the two half reactions by multiplying one or both half reactions by appropriate coefficients. The oxidation half reaction is thus rewritten to balance the...
Step 2 of 3

Chapter 16, Problem 16Q is Solved
Step 3 of 3

Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

Introductory Chemistry was written by and is associated to the ISBN: 9780321910295. This full solution covers the following key subjects: aqueous, balancing, basic, hydrogen, ions. This expansive textbook survival guide covers 19 chapters, and 2045 solutions. The answer to “When balancing aqueous redox reactions in basic media, hydrogen ions are neutralized using _____.” is broken down into a number of easy to follow steps, and 14 words. The full step-by-step solution to problem: 16Q from chapter: 16 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. Since the solution to 16Q from 16 chapter was answered, more than 343 students have viewed the full step-by-step answer.

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