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Chapter 21: Q21.5P (page 972)

During the redox balancing process, what step is taken to ensure thatloss equalsgain?

Short Answer

Expert verified

To make the gain and loss of electrons equal, half-reactions are multiplied by appropriate integers.

Step by step solution

01

Redox balancing process means,

Redox responses must be balanced. The component half-reactions for oxidation and reduction must be balanced in order to describe the total electrochemical reaction for a redox process. In general, this entails supplying H+, OH, H2O, and electrons to compensate for oxidation changes in aqueous solutions.

02

Determining the steps taken during the redox balancing process 

We verify that gained equals e-lost throughout the redox balancing procedure by multiplying both half-reactions by appropriate integers (the lowest common multiple).

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Most popular questions from this chapter

A voltaic cell consists of a standard hydrogen electrode in one half-cell and a Cu/Cu2+ half-cell. Calculate[Cu2+] whenEcell° is 0.22V

Use the emf series (Appendix D) to arrange the species.

(a) In order of decreasing strength as oxidizing agents:Fe3+,Br2,Cu2+

(b) In order of increasing strength as oxidizingagents :Ca2+,Cr2O72-,Ag+

Can one half-reaction in a redox process take place independently of the other? Explain

Why must an electrochemical process involve a redox reaction?


Use the following half-reactions to write three spontaneous reactions, calculate E°cell for each reaction, and rank the strengths of the oxidizing and reducing agents

(1)I2(s)+ 2e-n2I-(aq)E0=0.53V(2)S2O82 -(aq) + 2e-n2SO42 -(aq)E0=2.01V(3)Cr2O72 -(aq) + 14H+(aq) + 6e-n2Cr3 +(aq) + 7H2O(l)E0=1.33V
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