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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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Beverage and food: Water footprint price lists
These price lists show you how much water it costs to make certain drinks and meals. Nice to use to raise awareness about the water footprint at school parties, receptions ...
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Water Footprint: Infographics
In a few images we provide information about the water footprint in general, the water footprint of clothing, paper, food, snacks and drinks and some tips to reduce your water footprint.
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Phyphox: Experiments
A number of Phyphox experiments that students can perform with their smartphone.
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ArticleOther function -
La place de l'adjectif
Wall plate with an overview of the place of the adjective with a noun.
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Image (12)Teacher, ICT co-ordinator, … -
Negative phrase: Wall plate
Wall plate for the order of words in the negative sense in French.
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Image (9)Student (teacher training)