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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

Commercial electrolysis is performed on both moltenand aqueoussolutions. Identify the anode product, cathode product, species reduced, and species oxidized for the anode.

(a) molten electrolysis and

(b) aqueous electrolysis.

You are given the following three half-reactions:

(1) Fe3 +(aq) +e-鈬�Fe2 +(aq)(2) Fe2 +(aq) + 2e-鈬�Fe(s)(3) Fe3 +(aq) + 3e-鈬�Fe(s)

(a). Use Eohalf - cellvalues for ( 1 ) and ( 2 ) to find Eohalf - cell for ( 3 ).

(b) Calculate鈭�G0 for ( 1) and ( 2) from their Eohalf - cellvalues.

(c) Calculate鈭�G0 for (3) from (1) and ( 2 ).

(d) Calculate Eohalf - cellfor ( 3) from its 鈭�G0.

(e) What is the relationship between the Eohalf - cellvalues for (1) and (2) and theEohalf - cellvalue for (3 )?

You are investigating a particular chemical reaction. State all the types of data available in standard tables that enable you to calculate the equilibrium constant for the reaction at298 K.

Consider the following balanced redox reaction:

2CrO2-(aq)+2H2O(l)+6ClO-(aq)鈫�2CrO42-(aq)+3Cl2(g)+4OH-(aq)

(a) Which species is being oxidized?

(b) Which species is being reduced?

(c) Which species is the oxidizing agent?

(d) Which species is the reducing agent?

(e) From which species to which does electron transfer occur?

(f) Write the balanced molecular equation, with the spectator ion.

Which statements are true? Correct any that are false.

(a) In a voltaic cell, the anode is negative relative to the cathode.

(b) Oxidation occurs at the anode of a voltaic or electrolytic cell.

(c) Electrons flow into the cathode of an electrolytic cell.

(d) In a voltaic cell, the surroundings do work on the system.

(e) A metal that plates out of an electrolytic cell appears on the cathode.

(f) The cell electrolyte provides a solution of mobile electrons.
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