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Qualitative determination of sulphites in wine
Almost every label on a bottle of wine states that the wine contains 'sulfites'. Sulphites are therefore a frequently used additive during the vinification process because many winegrowers are convinced that they are indispensable to …
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The critical micelle concentration of sodium dodecyl sulfate
The determinations of the critical micelle concentrations (cmc) for ionic surfactants using specific conductivity measurements are excellent research projects for students and pupils to gain insight into some properties of substances in solution. …
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Giving an extra dimension to classic equilibrium tests
Chemical equilibrium is a difficult topic theoretically. By studying the complexation reactions in an aqueous solution of a copper salt with hydrogen chloride and with ammonia, it can be made clear that there is a single reaction system.
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Experiment with copper nanoparticles to show color changes
In this contribution, we discuss a student project where copper nanoparticles were prepared by reducing copper (II) sulfate using sodium borohydride. The use of iodide ions provides the necessary stabilization of the nanoparticles formed. The …
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The discovery of argon and the importance of accurate data analysis
John William Strutt, third baron of Rayleigh (1842-1919), is one of the most impressive figures in the history of the natural sciences. He is best known for his explanation of the blue color in the sky caused by Rayleigh scattering. It is less …
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Synthesis of gold colloids from honey
Gold colloid synthesis is a colorful nanochemical experiment. In this
contribution we discuss a student project where gold colloids are prepared from
a gold (III) salt using honey. The experiment is simple in execution.Translated by
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Determine the critical micelle concentration
Surfactants tend to form micelles in solution. The critical
micelle concentration is an important parameter for describing stability
of micelles. In this article we describe a relatively simple experiment through which
conductivity measurements the …Translated by
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Phyphox: Experiments
A number of Phyphox experiments that students can perform with their smartphone.
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Nature and environmental education for sustainable development: From theory to practice
The reflection instrument gives you an incentive to think about your educational effect.
To what extent is your educational effect focused on education for sustainable development (ESD)?It consists of three parts:
- schedule
- implementation …
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The Educational Effects of MOS: Study Report
How do you approach MOS or EDO at school to achieve the desired effects?
Thanks to this study report, you gain insight into what you can and cannot do better. An integrated approach, with broad support and a supportive school policy, is one of the …
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The measuring box: A suitcase with measuring instruments
The measuring box is a suitcase in which you can find useful material for the first degree a-current and b-current. On the basis of this material, the students become acquainted with the various measuring instruments that will be discussed in the …
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Balancing: The physics of the levers
The authors illustrate a series of fun activities that allow participants to explore the idea of levers, moments and balance. Teachers can discover these inquiry-based hands-on activities with their students through the guided steps themselves.
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Article (5)Other function