Eudiometer
The eudiometer (Gr .: air quality meter) is a glass tube closed on one side and provided with a scale . It is used to quantify gas volumes that arise during a chemical reaction .
Working principle
For this purpose, the eudiometer is completely filled with liquid and the open end is immersed in a bath of the same liquid. In the simplest case, this is water. A chemical reaction, which takes place below the eudiometer and produces gases, releases them into the eudiometer above, thereby displacing liquid from this. The volume of displaced liquid corresponds to the volume of the gas produced. Statements about the chemical reaction and the gas density can be obtained from this.
The eudiometer finds a technical application in the determination of the oxygen content of z. B. digester gases .
School experiment
For school purposes, the eudiometer is filled with hydrogen gas and oxygen gas. This mixture is then ignited by means of an electrical spark. Using this experiment, the law of the constant volume ratio is taught.
Web links
Individual evidence
- ↑ Gerhard Meyendorf: Laboratory Equipment and Chemicals , People and Knowledge Volkseigener Verlag Berlin, 1965, p. 21.