242
Components required:
1 x 220
Ω
resistor, 1 x moving-
coil instrument, 1 x breadboard,
1 x 9V battery with clip con-
nector
Fig. 2.217:
Generating hydrogen
Experiment
It is said that hydrogen promises future human mobility. A fuel cell transforms hydrogen and oxygen envi-
ronmentally neutral in water and generates electricity during this process. It is used to drive electro vehicles.
The common method used to mass produce hydrogen is via the electrolysis of water, that is the separation
of water molecules into the two components hydrogen and oxygen by means of electrical energy. Fill a glass
with tap water and build the circuit as described above. As soon as the battery is connected, gas bubbles
will move up along the electrodes. Hydrogen gas is generated at the electrode connected to the negative
battery terminal. The reaction is even more potent, if you add a bit of washing powder to the tap water.
Oxygen is generated at the positive electrode. The moving-coil instrument signals by a clear needle deflec-
tion that current is flowing.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.217.
Summary of Contents for ELECTRONICS EXPERIMENTS BOX
Page 4: ......
Page 265: ...267 Fig 3 56 Cir cuit 56 Audio limiter Fig 3 57 Circuit 57 Amplifier for a storm detector...
Page 269: ...271 Fig 3 64 Circuit 64 Stabilizer for 1 9 V Fig 3 65 Circuit 65 Stabilizer for 2 5 V...
Page 275: ...277 Fig 3 80 Circuit 80 Quiztimer 30 seconds Fig 3 81 Circuit 81 Handy diode tester...
Page 315: ...317 Fig 3 179 Circuit 179 HF generator 150 kHz Fig 3 180 Circuit 180 HF generator 420 kHz...
