1 Electrochemical Cells Worksheet
Electrochemical Cells Worksheet
CK-12 Foundation Chemistry
Name______________________ Date_________
Use the standard cell sketched above to answer questions 1 - 9.
1. Which electrode is the cathode?
A.
B.
C. Neither.
2. Which electrode is the anode?
A.
B.
C. Neither.
3. At which electrode will oxidation occur?
A.
B.
C. Neither.
4. What is the maximum voltage for this standard cell?
A.
B.
C.
D.
E.
5. Which way do the electrons flow in the external circuit?
A. From
to
.
B. From
to
.
C. No electron flow occurs.
2 Electrochemical Cells Worksheet
6. Which way do cations flow through the salt bridge?
A. Toward the
electrode.
B. Toward the
electrode.
C. No cation flow occurs.
7. What happens to the cell voltage when the reaction reaches equilibrium?
A. Becomes maximum.
B. Drops to zero.
C. Becomes a positive value less than maximum.
8. Which electrode will gain mass as the cell runs?
A.
B.
C. Neither.
9. What happens to the cell voltage as the cell runs?
A. Remains constant.
B. Increases.
C. Decreases.
D. May increase or decrease.
Use the standard cell sketched above to answer questions 10 - 21.
10. Which electrode is the anode?
A.
B.
C. Neither.
11. At which electrode does reduction occur?
A.
B.
C. Neither.
3 Electrochemical Cells Worksheet
12. What is the voltage of this standard cell?
A.
B.
C.
D.
E.
13. Which way do the electrons flow in the external circuit?
A. From
to
.
B. From
to
.
C. No electron flow occurs.
14. Which way do anions flows through the salt bridge?
A. Toward the
electrode.
B. Toward the
electrode.
C. No cation flow occurs.
15. Which electrode loses mass as the cell runs?
A.
B.
C. Neither.
16. How many moles of electrons pass through the external circuit in order for
of
atoms to be deposited on the cathode?
A. 6
B. 3
C. 4
D. 2
E. 1
17. If 24 electrons pass through the external circuit, how many atoms of zinc must react?
A. 24
B. 12
C. 8
D. 4
E. 0
18. If 24 electrons pass through the external circuit, how many atoms of aluminum must
react?
A. 24
B. 12
C. 8
D. 4
E. 0
19. What will happen to the voltage of the cell if the molarity of
is increased?
A. Increase.
B. Decrease.
C. Remain the same.
4 Electrochemical Cells Worksheet
20. What will happen to the voltage of the cell if the molarity of
is increased?
A. Increase.
B. Decrease.
C. Remain the same.
21. What will happen to the voltage of the cell if the salt bridge is removed?
A. Increase slightly.
B. Decrease slightly.
C. Remain the same.
D. Drop to zero.
22. In the two cells in this worksheet, there are a total of three reduction half-reaction
indicated,
,
, and
. Which of these three metals is most easily oxidized?
A.
B.
C.
23. Will a reaction occur if aluminum metal is placed in a solution of
?
A. Yes
B. No
24. Will a reaction occur if Pb metal is placed in a solution of
?
A. Yes
B. No
25. Will a reaction occur if aluminum metal is placed in a solution of
?
A. Yes
B. No