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CHM 112
Section 1

Homework Assignment #30
Due April 26, 2006 by 8:05 a.m.

Practice (not to be turned in): 18.53, 18.54

Part 1

For the electrochemical cells described below, complete and balance the reaction and find the thermodynamic equilibrium constant and Go (in units of kJ/mole) at 25 °C corresponding to the last digit of your Student ID Number.

0) Pt(s) | MnO2(s) | MnO4(aq) | pH=0 || Co2+(aq) | Co3+(aq) | Pt(s)

1) Pt(s) | Mn2+(aq) | MnO4(aq) | pH = 0 || Au3+(aq) | Au(s)

2) Pt(s) | Au3+(aq) | Au+(aq) || ClO3(aq) | Cl(aq) | pH = 0 | Pt(s)

3) Pt(s) | NO2(g) | HNO2(aq) | pH = 0 || MnO2(s) | Mn2+(aq) | pH = 0 | Pt(s)

4) Hg(l) | Hg22+(aq) || NO(g) | NO3(aq) | pH = 0 | Pt(s)

5) Pt(s) | MnO4(aq) | MnO42–(aq) || O2(g) | H2O2(aq) | pH = 0 | Pt(s)

6) Cu(s) | Cu2+(aq) || H2SO3(aq) | S(s) | pH = 0 | Pt(s)

7) Hg(l) | HgCl2(s) | Cl(aq) || VO2+(aq) | V3+(aq) | pH = 0 | Pt(s)

8) Fe(s) | Fe3+(aq) || H2S(g) | S(s) | pH = 0 | Pt(s)

9) Pb(s) | PbSO4(s) | SO42–(aq) || H3PO4(aq) | H3PO3(aq) | pH = 0 | Pt(s)


Part 2

Complete and balance the reaction corresponding to the eighth digit of your Student ID Number.

0) Cd(ClO4)2(aq) + H2S(aq)

1) Co(ClO4)2(aq) + H2S(aq)

2) Cu(ClO4)2(aq) + H2S(aq)

3) Fe(ClO4)2(aq) + H2S(aq)

4) Hg(ClO4)2(aq) + H2S(aq)

5) Mn(ClO4)2(aq) + H2S(aq)

6) Ni(ClO4)2(aq) + H2S(aq)

7) Pb(ClO4)2(aq) + H2S(aq)

8) Sn(ClO4)2(aq) + H2S(aq)

9) Zn(ClO4)2(aq) + H2S(aq)



Turn in the following on a clean, full sheet of paper (not torn out of a notebook):

Name
Student ID Number
The answers to the questions assigned. Show your work. This assignment will be worth 20 points.