Unit - Electrochemistry
Worksheet 4 Galvanic Cells
Knowledge -
/ 35 marks
1) What is charge of the anode? _____________ Is it gaining or losing mass? _________________.
2) What is the charge of the cathode?____________ Is it gaining or losing mass? ________________.
3) The species reduced is known as ? ______________________.
4) The species oxidized is known as? ______________________.
5) What is moving through the wire? ___________, and in what direction? ______________________.
6) What is moving through the salt bridge? _______, and in what direction? _____________________.
E.g.)
Cu2+ (aq) + Zn (s)
 Cu(s) + Zn2+(aq)
7) Is the Cu2+(aq) / Cu(s) half reaction an oxidation or a reduction? ________________.
8) Is the Zn(s) / Zn2+(aq) half reaction an oxidation or a reduction? _______________.
9) Indicate the cathode_________________ and the anode_________________ for the reaction above.
10. .
Label each component of the following shorthand representation of a
galvanic cell. (3 marks)
(a)
(b) What does the location (left or right of the double vertical line) of each substance in the shorthand
representation tell you about the cell? (3 marks)
(c) If you were to draw a diagram of the cell, would it matter whether the cathode was shown to the
right or to the left of the anode? Explain
your answer. (2 marks)
11. Use galvanic cell notation to represent a galvanic cell that has a copper electrode in copper(II) sulfate
solution and an iron electrode in iron(II) nitrate solution. (3 marks)
12. Consider the following half-reactions:
Oxidation: 2I–(aq) → I2(s) + 2e–
Reduction: MnO4–(aq) + 8H+(aq) + 5e– → Mn2+(aq) + 4H2O(l)
(a) Write the overall reaction. (2 marks)
(b) A galvanic cell based on this reaction uses inert electrodes, such as graphite electrodes. Explain
why. (2 marks)
(c) Write the shorthand representation of the cell using galvanic cell notation. (2 marks)
13. Use the following shorthand representation to sketch a possible design for the following cell. (4 marks)
Cd(s) | Cd2+(aq) || H+(aq), H2(g) | Pt(s)