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Electrochemistry, continued
Hofmann Electrolysis Apparatus
One-way glass stopcocks conveniently located on the top of this high-quality apparatus
allow for easy collection of gases during electrolysis experiments. The large
center reservoir bulb will easily handle the liquid displacement from the two side
columns and prevent any overflow during your experiments. Electrodes and directions
included. Requires ring stand, support clamp and a 9-V battery or DC power
supply. Measures 41 x 17 cm.
Catalog No. Description Price/Each
AP5879 Hofmann Electrolysis Apparatus $177.00
Hofmann Electrolysis Demonstration Apparatus
The clear glass collecting tubes are calibrated for easy measurement and observation.
The apparatus has its own rugged ring stand base. The built-in thistle tube and
stopcocks make for easy no-mess filling. Operates on a 9-V battery or DC power supply.
Platinum electrodes are included. Replacement glass assembly and electrodes are
available separately.
Catalog No. Description Price/Each
AP5439 Hofmann Electrolysis Demonstration Apparatus $291.00
AP6410 Replacement Glass Assembly for AP5439 91.75
AP6217 Replacement Electrodes for AP5439, Pkg. of 2 47.90
APPARATUS ELECTROCHEMISTRY
Hofmann
Electrolysis
Apparatus
AP5879
Hofmann
Electrolysis
Demonstration
Apparatus
AP5439
Equipment Drawer Sets
Lab Equipment
Drawer Set
AP7450
Lab Equipment Drawer Set
Save money, as well as valuable time, by eliminating
the need to set out supplies for each lab!
Contains: Support stand (4" x 6"), ring clamp (4"), two utility clamps, pH paper, digital
thermometer, crucible tongs (9"), forceps, flint lighter, wash bottle, test tube rack, two
test tube holders, test tube brush, wire gauze, clay triangle (2"), nichrome wire, marking
pencil, metric ruler, two glass stirring rods, one plastic stirring rod, rubber policeman,
three medicine droppers, two plastic funnels (23/4"), two spatulas, and a scoop.
Catalog No. Description Price/Each
AP7450 Lab Equipment Drawer Set $133.00
Advanced Equipment
Drawer Set
Save time and money with our advanced equipment
drawer set! Contains: four 50-mL beakers, two 150-mL beakers, two 250-mL
beakers, two 400-mL beakers, crucible tongs, two 50-mL Erlenmeyer flasks, two
125-mL Erlenmeyer flasks, 250-mL, forceps, long-stem funnel, short-stem funnel,
10-mL graduated cylinder, 25-mL graduated cylinder, 100-mL graduated cylinder, pH
test strips, spatula, stirring rod, test tube clamp, test tub rack, eight small test tubes,
eight large test tubes and two watch glasses.
Catalog No. Description Price/Each
AP8726 Advanced Equipment Drawer Set $181.00
Titration Equipment
Drawer Set
Equip your laboratory with our titration set! The
set contains 12 burets, 12 buret filling funnels, 6 buret brushes, 6 support stands and
6 double buret clamps. Neatly store your burets in the included rack between labs.
Catalogue No. Description Price/Each
AP9678 Titration Equipment Drawer Set $1660.00
Determine an Electrochemical Cell Potential
What causes an electric current to flow? There must be an electrical potential difference between two points in a circuit.
Electrodes made of materials that have different standard reduction potentials can provide these two points and allow
a current to flow through an electrochemical cell.
An electrochemical cell should be designed such that oxidation occurs at one of the electrodes (the anode) while
reduction occurs at the other electrode (the cathode). You can mix and match electrodes, using their standard reduction
potentials, to design your own electrochemical cell. If the net cell potential is positive, electrons will flow from the
anode to the cathode spontaneously. This is referred to as a voltaic cell. If the net cell potential is negative, an outside
source of electrical energy, such as a battery, is required for a current to flow. A non-spontaneous cell like this is referred
to as an electrolytic cell. The larger the difference between standard reduction potentials of two electrodes, the larger
the voltage produced (voltaic cell) or needed to run the cell
(electrolytic cell).
For tips on how to use a porous cup in an electrochemical
cell, see above How To box.
Titration
Equipment
Drawer Set
AP9678
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