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Electrochemistry
Electrodes
Catalog No. Description Dimensions
Zn Metal
(Anode)
1.1 Volts
Porous Cup
For voltaic cell experiments and other applications. Diameter: 3" x 11/2".
Catalog No. Description Price/Each
AP6359 Porous Cup, Economy $9.65
Voltaic Cell with Porous Cup
Includes a polystyrene voltaic cell body with a porous cup that sits inside, two
electrode brackets and electrodes—one each of iron, carbon, and aluminum and
two each of copper and zinc.
See free video at flinnsci.com.
Catalog No. Description Price/Each
AP5623 Voltaic Cell with Porous Cup $43.00
Voltaic Cell with
Porous Cup
AP5623
ELECTROCHEMISTRY continued on next page.
Porous Cup
AP6359
Metal Electrode Set
AP4602
Metal Electrode Set
Includes one strip each of aluminum, brass, copper, iron, lead and zinc. All are 6" x
1/2", except zinc, which is 5" x 1/2".
Catalog No. Description Price/Each
AP4602 Metal Electrode Set $10.10
Reduction
Half-Reaction
Standard Reduction
Potential, E°
Price/Pkg.
A0178 Aluminum Strips 6" x 1/2" Al3+ + 3e¯ → Al(s) –1.66 V $ 5.95/10
B0231 Brass Strips 6" x 1/2" — — 16.50/6
AP1817 Carbon, Graphite Pencil Leads 2 1/2" x 1/16" dia. Inert Electrode* 2.55/15
C0410 Carbon, Rods 4" x 1/4" dia. Inert Electrode* 11.90/6
C0182 Copper Strips 6" x 1/2" Cu2+ + 2e¯ → Cu(s) +0.34 V 11.15/6
Cu2+ + e¯ → Cu+ +0.15 V
Cu+ + e¯ → Cu(s) +0.52 V
I0058 Iron Strips 6" x 1/2" Fe3+ + 3e¯ → Fe(s) –0.04 V 7.42/10
Fe3+ + e¯ → Fe2+ +0.77 V
Fe2+ + 2e¯ → Fe(s) –0.45 V
L0065 Lead Strips 6" x 1/2" Pb2+ + 2e¯ → Pb(s) –0.13 V 9.05/6
N0089 Nickel (Plated steel, magnetic) 5" x 1/2" Ni2+ + 2e¯ → Ni(s) –0.26 V 19.30/6
S0270 Silver Foil** 3" x 2" Ag+ + e¯ → Ag(s) +0.80 V 50.30
T0087 Tin Strips 6" x 1/2" Sn4+ + 2e¯ → Sn2+ +0.15 V 12.10/6
Sn2+ + 2e¯ → Sn(s) –0.14 V
Z0024 Zinc Strips 5" x 1/2" Zn2+ + 2e¯ → Zn(s) –0.76 V 9.00/10
* Inert electrodes are electrodes made from a conducting, but unreactive, material. Thus, inert electrodes do not participate
in the cell reaction. Instead, they provide a support surface for the reaction and a means for electron transfer.
** Silver foil makes a great electrode. 3" x 2" is about 5 grams and can make 12–15 mini electrodes.
Prepare an
Electrolysis Solution
A 1 M sodium sulfate solution makes an excellent neutral electrolysis
solution. Prepare 100 mL of 1 M sodium sulfate solution
by dissolving
32 grams of sodium sulfate decahydrate in 70 mL of distilled or deionized
water. Once completely dissolved, dilute to a final volume of 100
mL using distilled or deionized water.
Use a Porous Cup for an
Electrochemical Cell
The porous cup prevents
the direct reaction between
the Zn metal and Cu2+. The
Cu2+ ions are contained
in the porous cup.
Conducting
Wire
Alligator
Clips
Cu Metal
(Cathode)
Cu2+(aq) and SO42–(aq)
inside the Porous Cup
Copper(II) Sulfate Solution
Zn2+(aq) and SO42–(aq)
inside the Beaker
Zinc Sulfate Solution
e¯
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