Sistema de Entrenamiento y Experimentación para Estudiantes TESS

 
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Síntesis del agua

Principle

"The combustion of hydrogen forms water (hydrogen oxide)". This statement is checked and verified in this student experiment. In this experiment hydrogen is generated and ignited in a  test tube.  After the addition of white anhydrous copper sulfate (into the tet ...

 
Detalles

Num.Producto: P7155600

Producción de yeso

Principle

Alabaster (amorphous calcium sulfate) can be produced by burning calcium sulfate. Gypsum piaster can be produced by burning calcium sulphate which contains water of crystallisation In this experiment students investigate the production of gypsum plaster out of hydrous calcium ...

 
Detalles

Num.Producto: P7155700

Procesado del yeso

Principle

Burnt gypsum can be cured by adding water and is used as a building material. This process is based on the absorption of water and of the consequent reformation of crystalline structures. In this experiment calcined gypsum is hardened by adding water and examined and proofed that ...

 
Detalles

Num.Producto: P7155800

Moldes de yeso

Principle

Gypsum can be used as versatile material, for example "prints" from different small objects can be built with gypsum. Such "negatives" can be filled with other materials which  create the so called "positive". In this experiment students produce imprints of coins and ...

 
Detalles

Num.Producto: P7155900

Composición mineral de las plantas

Principle

Plants contain many water-soluble minerals such as sodium chloride and sodium carbonate. In this experiment students extract and evaporate water-soluble minerals from plants. This obtained mineral salts are investigated with the flame test to determine the different ...

 
Detalles

Num.Producto: P7156000

Absoción de minerales en plantas

Principle

 Plants absorb mineral components through the roots from the soil and transport them to the leaves. In this experiment students examine how mineral components are "absorbed" in plants. . Therfore students let plants grow in water containing mineral fertilizers as weil as in ...

 
Detalles

Num.Producto: P7156100

Fertilización amonia

Principle

A main constituent of fertilizers is nitrogen. Nitrogen is supplied to the soil in form of ammonia salts. In this experiment students produce ammonia fertilizer. Therfore the let react ammonia solution with sulfuric acid and after evaporation of the solvent ammonium sulfate is ...

 
Detalles

Num.Producto: P7156200

Cal quemada

Principle

To "heavy" soils are often added ammonia fertilizer . Burnt lime loosens up and neutralized such soils and accelerates the decomposition of ammonia fertilizer and promotes plant growth. In this experiment students examine the effect of adding quicklime to ammonia ...

 
Detalles

Num.Producto: P7156300

Perlas de vidrio sódico-cálcico

Principle

Glass, one of the most important materials, is a solidified melt of metal oxides and silica. In this experiment students manufacture glass in a simple manner by melting a mixture of calcium carbonate, sodium carbonate and silica sand.

 

What you can learn about

  • How ...
 
Detalles

Num.Producto: P7156400

Precauciones generales de seguridad a tener en cuenta cuando se trabaja con ácidos

Principle

Concentrated acids decompose natural substances and are highly corrosive (e.g. in contact with metalls). When handling with acids safety precautions must be maintained. In this experiment students examine the effect of concentrated acids in contact with meat, paper and ...

 
Detalles

Num.Producto: P7157000

Peligrosidad del concentrado de ácido sulfúrico

Principle

Concentrated sulfuric acid is not only highly corrosive, but has also a strong dehydrating effect especially on natural substances. In this experiment students examine reactions of concentrated sulfuric acid with sugar, water and paper and observed the reactivity of ...

 
Detalles

Num.Producto: P7157100

Pigmentos de plantas como indicadores

Principle

To determine the pH (acidity or alkalinity) of an aqueous solution you can use pH meters or indicators. When using indicators the most known indicators are phenolphthalein or litmus. pH indicators can also be extracted from flowers or some vegetables such as red cabbage juice. In ...

 
Detalles

Num.Producto: P7157200

Efectos de los ácidos en los indicadores

Principle

Indicators are dyes that indicate by a color change the presence of acids. A large number of vegetable colorants, which act as indicators, can be found. In this experiment students examine the effect of different acids on different natural substances (for example flower ...

 
Detalles

Num.Producto: P7157300

Efecto de los ácidos y sosa caústica en indicadores naturales y comerciales

Principle

Indicators are dyes that indicate by a color change the presence of acids. Many of these indicators are dyes from naturally occurring fruits and vegetables. There are in addition to these naturally occurring technical manufactured dyes that can serve as indicators such as ...

 
Detalles

Num.Producto: P7157400

Efecto de los ácidos en metales

Principle

In general acids are highly caustic. In addition acids can also be used as an oxidizing agent, they react with metals. The results of this reaction are the corresponding salts ("metal cation and the acid anion") and hydrogen. In this experiment students examine ...

 
Detalles

Num.Producto: P7157500

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