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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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Atomic orbitals of hydrogen
Visualizing atomic orbitals of hydrogen using parametric equations.
Atomic orbitals are not a standard subject in secondary chemistry education in the Netherlands and Flanders. Teachers do pay attention to this subject. Simplified artistic …
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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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Greenhouse Effect: PhET Simulation
In the simulation of PhET Colorado, a number of questions are asked about the amplification and the natural greenhouse effect.
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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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Synthesis of gold colloids from electronic waste
In this article, we discuss the synthesis of starch stabilized gold colloids, starting from gold recovered from electronic waste. The recycled gold was cleaned with concentrated nitric acid and dissolved in aqua regia. After evaporating the acidic …
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Chemical naming: Memory
Memory game with the most important chemical elements to practice their naming.
If you print this document, you will have the memory game three times.
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Researcher/research: Broaden your own horizon
This sheet is a translation of Competency Pictures : On the way with artistic competences to classroom practice and provides an answer to the question: how can you translate the researcher/research competence picture : broaden your own horizon …
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Researcher/research: making process visible
This sheet is a translation of Competency Pictures : On the way with artistic competences to classroom practice and provides an answer to the question: how can you translate the researcher/research competence picture: making the process visible …
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