Name: 
 

Chemistry 12 - Chapter 9 Quiz



True/False
Indicate whether the sentence or statement is true or false.
 

1. 

Oxidation corresponds to an increase in oxidation number.
 

2. 

Reduction is a process in which electrons are lost or donated by an atom or ion in a redox reaction.
 

3. 

An oxidizing agent gains electrons and one of its atoms decreases in oxidation number.
 

4. 

The strongest oxidizing agent in a galvanic cell is above the strongest reducing agent in the redox table, producing a cell potential that is negative.
 

5. 

The cathode of a cell is the electrode where electrons are lost or given up by the reducing agent.
 

6. 

Only the cell potential can be experimentally measured and a reference half-cell, assigned a zero value, is necessary to calculate reduction potentials.
 

7. 

The cell potential of a standard lead-nickel cell is –0.39 V.
 

8. 

Corrosion is an electrochemical process in which electrons are transferred.
 

9. 

The development of electric cars is closely related to advances in the hydrogen fuel cell.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

10. 

A reducing agent can be described as a substance that
a.
loses electrons and causes reduction.
b.
loses electrons and becomes reduced.
c.
gains electrons and causes oxidation.
d.
gains electrons and becomes reduced.
e.
gains electrons and becomes oxidized.
 

11. 

Which of the following solutions should not be stored in a tin-plated container?
      I      NaNO3(aq)      III      SnBr2(aq)
      II      AgNO3(aq)      IV      Cl2(aq)
a.
I only
b.
II, III, IV
c.
II and III
d.
II and IV
e.
III and IV
 

12. 

The oxidation number of the carbon atom in the carbonate ion is
a.
+8
b.
+6
c.
+4
d.
+2
e.
0
 

13. 

In a galvanic cell,
a.
electrons are provided by the reducing agent at the negative electrode.
b.
electrons are gained by the oxidizing agent at the negative electrode.
c.
electrons flow through the solution from the anode to the cathode.
d.
electrons flow through the solution from the cathode to the anode.
e.
electrons flow through the porous barrier from the cathode to the anode.
 

14. 

A porous boundary, or a salt bridge, is required in a standard cell to
a.
conduct electrons from the anode to the cathode.
b.
transfer ions between the half-cells.
c.
keep the electrodes from contacting.
d.
maintain standard conditions in both half cells.
e.
stop current flow when electrodes are connected.
 

15. 

If the electrodes of a standard copper-silver cell are connected with a wire,
a.
silver is plated at the anode.
b.
a voltmeter would show a reading of 1.14 V.
c.
electrons flow from the silver to copper electrodes.
d.
the solution at the anode becomes darker blue.
e.
the silver ion concentration increases.
 

16. 

The standard hydrogen half-cell can be represented as
a.
Pt(s) | H2(g)
b.
Pt(s) | H+(aq)
c.
Pt(s) | H2(g), H+(aq)
d.
Pt(s) | H2(g) || H+(aq)
e.
Pt(s) | H2(g) || H+(aq), OHc12-ch9_files/i0180000.jpg(aq)
 

17. 

The corrosion of iron is accelerated by
a.
low humidity.
b.
lack of oxygen.
c.
low temperature.
d.
nonelectrolytes.
e.
low pH.
 

18. 

Cathodic protection of iron is effective because the iron
a.
is forced to become the anode of a cell.
b.
is forced to become the cathode of a cell.
c.
is no longer a part of any electrochemical cell.
d.
is attached to the positive terminal of a battery.
e.
is electrically prevented from gaining electrons.
 



 
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