Principle
In principle, a galvanic cell consists of two different metallic
electrodes which dip into an aqueous solution of an electrolyte. A
voltage is generated between the electrodes, whose origin can
be explained, in a simplified way, by the passage of positive metal
ions from the surface of the electrodes into
the solution. Consequently freely mobile electrons
are left behind on the electrodes.
As this process occurs to different extents with different
metals, the strengths of their negative charges are different. This
difference in charge is the source of the voltage.
In this experiment, the students should become acquainted with
the construction and mode of action of single cells which are
frequently used in practice, but then are more
complicated.
Benefits
- No additional cable connections between the building blocks needed - clear arragned and quick setup
- Contact saftey due to puzzle blocks system
- Corrosion-free gold plated contacts
- Doubled earning sucess: Electric circuit diagram on top, real components can be seen unterside
Tasks
How can electric current be generated from chemical
processes?
Examine whether voltages are generated between two
electrodes of different materials held in an aqueous solution of an
electrolyte.