Chapter 20Electrochemistry

Chemistry: The Central Science, 10th edition

Theodore L. Brown, H. Eugene LeMay, Jr., and Bruce E. Bursten

Todd Austell, The University of North Carolina 2006, Pearson Prentice Hall

1. Yes

2. No

1. Yes

2. No

1. because they are being repelled by the negative charges building up in the cathode.

2. because a negative charge must be maintained in the anode to keep the cell working.

3. because positive charge builds up in the anode and must be neutralized as oxidation takes place there.

4. because the anions provide a carrier for the cell’s electrical current.

1. because they are being repelled by the negative charges building up in the cathode.

2. because a negative charge must be maintained in the anode to keep the cell working.

3. because positive charge builds up in the anode and must be neutralized as oxidation takes place there.

4. because the anions provide a carrier for the cell’s electrical current.

1. the interior Zn atoms

2. the surface Zn atoms

3. Both the interior and surface Zn atoms are equally involved.

1. the interior Zn atoms

2. the surface Zn atoms

3. Both the interior and surface Zn atoms are equally involved.

1. Yes

2. We need more information to determine spontaneity.

3. No

1. Yes

2. We need more information to determine spontaneity.

3. No

1. 1 barr pressure for Cl2(g) and 1 M solution for Cl–(aq).

2. 1 M solution for Cl2(g) and for Cl–(aq).

3. 1 atm pressure for Cl2(g) and for Cl–(aq).

4. 1 atm pressure for Cl2(g) and 1 M solution for Cl–(aq).

1. 1 barr pressure for Cl2(g) and 1 M solution for Cl–(aq).

2. 1 M solution for Cl2(g) and for Cl–(aq).

3. 1 atm pressure for Cl2(g) and for Cl–(aq).

4. 1 atm pressure for Cl2(g) and 1 M solution for Cl–(aq).

1. We need more information to determine driving force.

2. True

3. False

1. We need more information to determine driving force.

2. True

3. False

1. Hg(l)

2. Pb(s)

1. Hg(l)

2. Pb(s)

1. only Cu

2. only Ni

3. Al, Zn

4. Cu, Ni

1. only Cu

2. only Ni

3. Al, Zn

4. Cu, Ni