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- An apparatus for collecting gases produced by
- the electrolysis of a liquid. It consists of
- a vertical E-shaped glass tube with taps at
- the upper ends of the outer limbs and a
- reservoir at the top of the central limb.
- Platinum electrodes fused into the lower ends
- of the outer limbs are connected to a source
- of direct current. At the beginning of an
- experiment, the outer limbs are completely
- filled with electrolyte by opening the taps.
- The taps are then closed and the current
- switched on. Gases evolved at the electrodes
- bubble up the outer limbs and collect at the
- top, where they can be measured.
-