Sistema de Entrenamiento y Experimentación para Estudiantes TESS

 
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Separación de mezclas - extracción

Principle

Mixtures can be "decomposed" by various separation processes into their component parts. One of these separation process is the so-called "extraction", wherein with the aid of an extraction agent only one component is dissolved from a solid or liquid mixture. In this ...
 
Detalles

Num.Producto: P7151000

Separación de mezcla - cromatografía

Principle

Mixtures can be separated by different physical separation processes into its components. An important separation method is chromatography. In this experiment dyes are separated by chromatography into individual components. This experiment shows that monochrome appearing dyes can be ...
 
Detalles

Num.Producto: P7151100

Separación de mezclas - cromatografía

Principle

Pigments can be separated by chromatography. Pigments which appear to be of a uniform colour can in reality be composed of several different-coloured substances. A further segregation of the prepared leaf pigment and a felt-tipped pen ink are shown in this experiment.

...
 
Detalles

Num.Producto: P7151101

Oxidación de los metales

Principle

Many metalls are still used for technical applications today. A disadvantage is that metals (when heated in air) undergo chemical and physical changes. But not all metals undergo these changes, means that metals differ in their reactivity to heating in air. While for some ...

 
Detalles

Num.Producto: P7153000

Factores determinantes del comportamiento de reacción de los metales

Principle

If you heat metals (in air) many of them undergo chemical changes. This experiment shows that different metals  undergo this change with different velocity rates. The rapidity and the rate of the reactions depends on the one hand of the type of metal ...

 
Detalles

Num.Producto: P7153100

Oxígeno, causa de oxidación

Principle

Metals react on heating with the surrounding air. The oxygen in the air causes an oxidation with the metall, which is determined in this experiment.   Students will so find out which factors are responsible for the chemical reaction of metals on ...

 
Detalles

Num.Producto: P7153200

La importancia del aire en los procesos de combustión

Principle

The combustion of compounds is also a chemical reaction with (components of) air. In this experiment students determine the importance of air for combustion processes and learn that the presence of air is required for combustion. It is demonstrated that even very highly ...

 
Detalles

Num.Producto: P7153300

Aire, una mezcla de sustancias

Principle

Air (oxygen) is needed for many reactions, e.g. for combustions.  In  this  experiment students determine whether air as a whole is required for combustion. This experiment shows that in combustion reactions only a part of the air is consumed. This result means that ...

 
Detalles

Num.Producto: P7153400

Propiedades del oxígeno

Principle

Oxygen is a component of many compounds. Pure oxygen can be obtained from oxygen-rich compounds, which is shown in this expriment. Oxygen is prepared from a compound and its properties investigated. This experiment also shows that oxygen has characteristic properties, which ...

 
Detalles

Num.Producto: P7153500

reacciones del oxígeno puro

Principle

In pure oxygen substances burn much faster than in air and the reaction of elements with oxygen results in oxides. In this experiment metals (such as zinc) and non-metals (such as charcoal) are  heated in air and in pure oxygen. So Students find out that pure ...

 
Detalles

Num.Producto: P7153600

Análisis cuantitativo del oxígeno

Principle

In all chemical reactions the law of conservation of mass is valid, this means the sum of the mass of starting materials ís the same as the sum of the mass of products. This law is also valid for combustion reactions in air and means that oxides as binary ...

 
Detalles

Num.Producto: P7153700

Nitrógeno, preparación y propiedades

Principle

Nitrogen as a major component of  air can be obtained from it by removing the oxygen. In this experiment an air stream is passed over heated steel wool and passed into a pneumatic pan. This so "produced" nitrogen is examined for its characteristic properties ...

 
Detalles

Num.Producto: P7153800

Dióxido de carbono, preparación y propiedades

Principle

Carbon dioxide (as a component of air) is a substance that surrounds us every day. In laboratory, carbon dioxide is not obtained from the air, carbon dioxide is prepared  from carbonates by adding acids to the carbonates. In this experiment carbon dioxide is prepared by ...

 
Detalles

Num.Producto: P7153900

Modelo de extinguidor de fuego

Principle

Carbon dioxide has characteristic properties which are used in the technical applications. For example the flame-smothering effect of the carbon dioxide is used for firefighting. In foam extinguishers carbon dioxide is produced and sprayed as a foam into the burning substances ...

 
Detalles

Num.Producto: P7154000

Estructura y modo de operación de un quemador Bunsen

Principle

The Bunsen burner is based on the principle of adjustable gas combustion with air supply. By varying the quantity of air supplied, different burner temperatures can be achieved. Students investigate in this experiment the construction and mode of operation of a Bunsen ...

 
Detalles

Num.Producto: P7154100

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