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Electrochemistry Worksheet: Redox Reactions and Standard Potentials - Prof. Zelda Ziegler, Assignments of Chemistry

This worksheet from ch 223 covers various questions related to electrochemistry, including identifying better reducing and oxidizing agents, balancing redox equations, and calculating standard potentials and spontaneity. Students are required to have a table of standard reduction potentials for completion.

Typology: Assignments

Pre 2010

Uploaded on 08/18/2009

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CH 223 Ziegler Worksheet on Electrochemistry
You will need a table of Standard reduction potentials to work this worksheet. See appendix
E in your book.
1. Which species of the following pairs is the better Reducing agent?
a. Ag or Au
b. Cl- or I-
c. Mn+2 or Fe+2
d. H2 in acidic solution or in basic solution
2. Which species in the following pairs is the better Oxidizing agent?
a. Br2 or H2O2
b. SO4
-2 or MnO4
-
c. AgBr(s) or Ag+
d. O2 in acidic solution or basic solution
3. Arrange the following in order of increasing strength of oxidizing agent
Al
+3 AgBr F2 ClO3
- (acidic) Ni+2
Balance the following redox equations.
4. 2
22
() () () ()
M
nO s I aq I s Mn aq
−+
+→+
pf3
pf4

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CH 223 Ziegler Worksheet on Electrochemistry

You will need a table of Standard reduction potentials to work this worksheet. See appendix E in your book.

  1. Which species of the following pairs is the better Reducing agent?

a. Ag or Au

b. Cl-^ or I-

c. Mn+2^ or Fe+

d. H 2 in acidic solution or in basic solution

  1. Which species in the following pairs is the better Oxidizing agent?

a. Br 2 or H 2 O 2

b. SO 4 -2^ or MnO 4 -

c. AgBr(s) or Ag+

d. O 2 in acidic solution or basic solution

  1. Arrange the following in order of increasing strength of oxidizing agent

Al+3^ AgBr F 2 ClO 3 -^ (acidic) Ni+

Balance the following redox equations.

2 MnO 2 (^) ( ) s I ( aq ) I (^) 2 ( ) s Mn ( aq )

− +

  • → +

H (^) 2 ( g ) S s ( ) H O 2 S ( aq )

  • → +

2 3 O 2 (^) ( g ) Fe ( aq ) Fe ( aq ) H O l 2 ( )

  • → +
  1. Consider the reaction.

Fe I 2 Fe I 2

a. Balance this equation

b. Calculate the E° for this reaction.

c. Is it spontaneous or not?

d. For what concentration of I- is the voltage zero, if all other species are at standard conditions?