Système d'Expérimentation Élèves TESS

 
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The detection of carbon with lime-water

Principle

Organic substances contain carbon and hydrogen atoms in their molecular structures. This is the reason why carbon dioxide and water is always produced when these substances are burned.

In this experiment, different organic substances are combusted and students investigate which ...

 
Détails

Numéro d´article: P1149701

Méthode de base de l'imagerie de micro et nanostructuresavec le microscope à force atomique (AFM)



Principle

Approaching a sharp silicon tip mounted on a cantilever to a sample surface leads to an atomic scale interaction. The result is a bend of the cantilever which is detected by a laser. In static mode the resulting deflection is used to investigate the topography of the ...

 
Détails

Numéro d´article: P2538000

Properties of Matter,hardness, colour,magnetisability,water, solubility

Principle

This experiment shows in a simple way to investigate the properties of ( chemical ) substances to be investigated. In this experiment, students work with materials from everyday life  and study the difference of substances in terms of hardness , color , ...

 
Détails

Numéro d´article: P7150100

Solubility of a substance

Principle

The solubility of a substance in a specific solvent (e.g. water) is a unique characteristic of this substance. In addition, all substances can be divided into specific groups of classes of substances (e.g. water-soluble substances).

Benefits

  • Experiment guides are very easy to ...
 
Détails

Numéro d´article: P7150102

Acidic or basic character of solutions

Principle

This experiment demonstrates how the characteristics of (chemical) substances can be examined. The students work with substances that they know from their everyday life and they determine the pH value or character (acidic, neutral or alkaline) of various solutions. For this purpose, ...

 
Détails

Numéro d´article: P7150104

Properties of material - combustibility, melting point

Principle

Substances can be identified and described by means of their characteristic properties. The combustibility and the melting point belong to these properties and will be invetigated of iron, sand, sodium chloride, sulphur and naphtalene

 
Détails

Numéro d´article: P7150200

Properties of matter - density determination

Principle


The density of a substance is an essential feature to identify a substance at specified temperature and pressure conditions  . With the help of the " density " substances can be characterized and divided in different classes ( metals in heavy and light metals ) . In this ...

 
Détails

Numéro d´article: P7150500

Properties of matter - density determination

Principle

The density of a substance corresponds to the mass of a cubic centimetre of this substance. The density is thus defined as mass : volume (g/cm3). The density of irregular objects can be established by determining the mass by weighing it and the volume by the displacement of ...

 
Détails

Numéro d´article: P7150501

Properties of mixtures

Principle

In this experiment students study mixtures and their properties (eg. water solubility). This experiment shows that finely divided materials and gases can be mixed in any proportion. Mixtures of solids generally appear heterogeneous, the individual components can be ...

 
Détails

Numéro d´article: P7150600

Properties of mixtures

Benefits
  • Experiment guides are very easy to understand, especially for younger students
  • Associated competences are directly linked to the experiments
  • Curriculum compatible
  • Fit for the future: implementation of tablets possible

 

...
 
Détails

Numéro d´article: P7150601

Liquid mixtures

Principle

Mixtures can consist of solids, liquids or gases. Finely divided solids or gases can be mixed in any proportion with each other. In contrast some liquids can not be mixed together. There are liquids which mix completely with each other and others which mix hardly. In this ...

 
Détails

Numéro d´article: P7150700

Mixture separation - evaporation

Principle

Most of substances in nature are a mixture of two or more components. These mixtures can be separated by different physical separation processes (for example filtration or evaporation) into the  individual components. One known methode is the evaporation of the solvent from a ...
 
Détails

Numéro d´article: P7150800

Mixture separations - filtration, magnatic separation

Principle


Many substances in nature are a mixture of two or more components. These mixtures can be separated into individual comonents by physical separation processes (for example by filtration). This experiment demonstrates how a mixture of salt and sand can be separated into its ...

 
Détails

Numéro d´article: P7150900

Mixture separations by sieving and filtration

Benefits
  • Experiment guides are very easy to understand, especially for younger students
  • Associated competences are directly linked to the experiments
  • Curriculum compatible
  • Fit for the future: implementation of tablets possible


...
 
Détails

Numéro d´article: P7150901

Mixture separations by magnetic separation

Principle

This student experiment includes a demonstration of the principle of magnetic separation. In order to demonstrate the technical separation of mixtures, iron filings are separated from sand. The student experiment demonstrates the importance of this method, which is also known as ...

 
Détails

Numéro d´article: P7150902

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