3B Scientific Hofmann's Voltameter, Small - Manual

3B SCIENTIFIC® PHYSICS
1
Hofmann's Voltameter, S U58010
Instruction Sheet
11/08 ALF
1 Stand base with rod
2 Sockets
3 Gold leaf electrodes
4 Gas collection tube
5 Stop cock
6 Water reservoir
1. Safety instructions
The apparatus is made of glass. There is a risk of
breakage and resulting injury.
• Handle the apparatus with care when carrying it
and make sure it is stable on the desk.
• Do not subject the glass components to
mechanical stress.
Hydrogen and oxygen form an explosive mixture.
• Never re-combine the gases in a test tube.
Since the conductivity of distilled water is too low
electrolysis is carried out using dilute sulphuric acid
(c = 1 mol/l approx.). Students should always be
informed of the dangers of the chemicals needed for
the experiment.
• Carefully add the sulphuric acid to the water
while stirring. Never do this the other way round.
• Wear protective goggles when mixing the solution
and when releasing the gases.
Caution! Any acid that escapes can cause irreparable
stains and holes in clothing.