As explained in the book, the Voltaic cell is where the two components of a spontaneous redox reaction are separated by an electric circuit. The electrons being transferred travel through the electric circuit, and their kinetic energy can thus be utilized by devices such as a light. a. Note the half-reaction on the oxidation side. As the electron is taken away through the electric circuit, what is left? Which component of the salt bridge (the cation, Na*, or the anion, Cl") will migrate towards this side to balance the charges? As shown on the figure, the electrode where oxidation is taking place is called the b. Now note the half-reaction on the reduction side. As the electron arrives from the electric circuit, what does it consume? Which component of the salt bridge (the cation, Na*, or the anion, Cl) will migrate towards this side to balance the charges? As shown on the figure, the electrode where reduction is taking place is called the c. What is the direction of the electron flow through the external electric circuit? The electrons flow from the to the
As explained in the book, the Voltaic cell is where the two components of a spontaneous redox reaction are separated by an electric circuit. The electrons being transferred travel through the electric circuit, and their kinetic energy can thus be utilized by devices such as a light. a. Note the half-reaction on the oxidation side. As the electron is taken away through the electric circuit, what is left? Which component of the salt bridge (the cation, Na*, or the anion, Cl") will migrate towards this side to balance the charges? As shown on the figure, the electrode where oxidation is taking place is called the b. Now note the half-reaction on the reduction side. As the electron arrives from the electric circuit, what does it consume? Which component of the salt bridge (the cation, Na*, or the anion, Cl) will migrate towards this side to balance the charges? As shown on the figure, the electrode where reduction is taking place is called the c. What is the direction of the electron flow through the external electric circuit? The electrons flow from the to the
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter13: Electrochemistry
Section: Chapter Questions
Problem 13.9PAE: The following oxidationreduction reactions are used in electrochemical cells. Write them using cell...
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Transcribed Image Text:Activity 2: Half Reactions and the Galvanic Cell
We cannot have an introduction to electrochemistry without introducing the electrochemical cell (or
Galvanic/Voltaic cell). The common example of a Voltaic cell is one made of a copper electrode and a
zinc electrode, as shown in the figure below:
(a)
voltmeter
2Na+
Cu
cathode
shell
salt bridge,
NaCl(aq)
Cu²+
Zn
anode
1 M Zn(NO₂)₂(aq)
NO
1.10
NO₁
oxidation half-reaction:
Zn(s) →→→ Zn² (aq) + 2e
overall reaction: Zn(s) + Cu²(aq) → Zn²+ (aq) + Cu(s)
reduction half-reaction:
Cu2(aq) + 2e → Cu(s)
1
I M Cu(NO₂)₂(aq)
Zn anode
(b)
Cu cathode
Transcribed Image Text:As explained in the book, the Voltaic cell is where the two components of a spontaneous redox reaction
are separated by an electric circuit. The electrons being transferred travel through the electric circuit,
and their kinetic energy can thus be utilized by devices such as a light.
a. Note the half-reaction on the oxidation side. As the electron is taken away through the electric
circuit, what is left? Which component of the salt bridge (the cation, Na*, or the anion, CI") will
migrate towards this side to balance the charges?
As shown on the figure, the electrode where oxidation is taking place is called the
b. Now note the half-reaction on the reduction side. As the electron arrives from the electric
circuit, what does it consume? Which component of the salt bridge (the cation, Na*, or the
anion, Cl) will migrate towards this side to balance the charges?
As shown on the figure, the electrode where reduction is taking place is called the
c. What is the direction of the electron flow through the external electric circuit?
The electrons flow from the
to the
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Q
6
M
&
7
8
1
9
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