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pH and Outdoor Education - the Example of the Hromnice Lake and the Kladská Peat Bog
| Citace: |
HRDLIČKA, J.; ŠRÁMOVÁ, A. pH and Outdoor Education - the Example of the Hromnice Lake and the Kladská Peat Bog. Kraków, 2023.DidSci 2023.
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| Druh: | PŘEDNÁŠKA, POSTER |
| Jazyk publikace: | eng |
| Anglický název: | pH and Outdoor Education - the Example of the Hromnice Lake and the Kladská Peat Bog |
| Rok vydání: | 2023 |
| Místo konání: | Kraków |
| Autoři: | Ing. Jan Hrdlička Ph.D. , Mgr. Alena Šrámová |
| Abstrakt EN: | The paper is focused on the description of the outdoor teaching project preparation with the topic of pH. The different available methods usable for in-situ pH determination were addressed. The problems that may arise when measuring in real natural samples were discussed too. Two interesting sites in western Bohemia were chosen. The Hromnice lake, which was formed as tailings dump after vitriol shale extraction, is an example of the extreme properties of the water. Due to its origin, it has a significant content of ferric sulfate and free sulphuric acid. pH of about 3 corresponds to the content of these. Determination of pH by pH paper is problematic due tointerference of ferric ions. The high conductivity corresponds to the salt content, and presence of ferric ions can be proved easily in the water sample. The relationship with geology and biology is also significant in this project, as is the overlap with the history of chemical technology. The peat bog near Kladská is another example of the extreme environment. It is an upland peatland. The water has a typical colour due to humic acid content, low pH and also a low mineral content. There is also a significant relationship to biology (typical flora and fauna, occurrence of carnivorous plants). The described projects are also useful in interdisciplinary education combined chemistry with other subjects (geography, biology). In connection with the topic of pH, they are suitable projects for secondary schools, but they can be used also for primary school pupils with a reduced scope of knowledge. |
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