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One of the
most elegant pieces of laboratory equipment, the Hoffman
Apparatus, used to produce Hydrogen & Oxygen gas from water... or other gases from other liquids. This is a top quality
piece of laboratory equipment, not 'student grade' or similar
designations. Our Hoffman Apparatus comes complete with two sets
of electrodes, one Carbon and the other Platinum. The Platinum
set of electrodes are used for the electrolysis of water and the
Carbon electrodes are used for the electrolysis of Ammonia or
Hydrochloric Acid. The glass unit has two connected limbs
graduated to 60 ml capacity, integral with reservoir tube and
funnel shaped bulb, with a stopcock at the top of each limb. The
lower part of the limbs accept the electrodes. The overall
length of the unit (apparatus only, without the stand) is about
2 feet.
To produce Hydrogen & Oxygen gas, simply fill the unit with
water (with a little Citric Acid or Potassium Hydroxide added to
make the water more conductive) and apply a DC voltage to the
two electrodes
(a 12 volt battery works fine if no DC power supplies are
available). When power is applied, Hydrogen gas will begin
to bubble off of one electrode and Oxygen gas the other.
Perfect for demonstrations on the production of Hydrogen. Fill
balloons with Hydrogen gas or use the gasses produced for other
experiments.
The unit comes complete with stand and clamp(s). New units have an upgraded double clamp or clamps and the stand & clamp mounting may differ from the image shown - but is essentially similar.
Packaged in a solid block of
Styrofoam for damage-free delivery.
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