Química

 
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Enlace del nitrógeno por metales base

Principle

In this experiment the reactivity of nitrogen with various metals is investigated. Nitrogen as a typical non-metal should react with metals to the corresponding salt in the form of an exothermic reaction. However metals react only very little with nitrogen. Nitrogen reacts at room ...

 
Detalles

Num.Producto: P1140500

Preparación del amoniaco a partir de los elementos (proceso de Haber-Bosch) (CT 16.4)

Principle

 Ammonia (which is of technical and economic importance) is obtained from the reaction of nitrogen with hydrogen. But this reaction is strongly inhibited (high activation energy is needed to start the reaction) and leads normally to poor yields. Beacuse of this reason Fritz ...

 
Detalles

Num.Producto: P1140700

Grafito y diamante

Principle

In this experiment, the properties of graphite powder and diamond are examined and compared.The experiments show that graphite, diamond and coal are very different from the external impression, and are used in very different industrial fields. In chemical reactions it
...
 
Detalles

Num.Producto: P1142200

Propiedades de Aluminio

Principle

In this experiment, the properties of graphite powder and diamond are examined and compared.

Benefits

  • Experimental literature available for pupils and teachers: Minimum preparation time
  • Hazard assessment for pupils and teachers available
  • Easy teaching and efficient ...
 
Detalles

Num.Producto: P1143400

Producción de aleaciones de metales

What you can learn about
  • Preparation of alloys
  • Brass and bronze
  • Alloys are mixtures not compounds
 
Detalles

Num.Producto: P1143901

Sales complejas

Principle 

In this experiment students investigate the formation of a complex compound. They recognize that a complex compound is already present in aqueous solution for many metal ions of the subgroup elements. The central ion is surrounded by a hydrath nozzle (water ...

 
Detalles

Num.Producto: P1145500

Soluciones salinas: reacciones ácidas, neutras y alcalinas

Principle

The pH-value of a prepared salt solution can be predicted by the strength of the acids and bases which are part of the salt solution. Salts of equally strong acids and bases (e.g., NaCl) react neutral in aqueous solution. Salts of a weak acid / base and strong base / ...

 
Detalles

Num.Producto: P1145600

Deposición electrolítica y cantidad de electricidad (Primera ley de Faraday)

Principle

During an electrolysis reaction, the deposited mass m of a substance is directly proportional to the flow of charge (First Faraday's law). The second Faraday law states that the electrochemical equivalents k (deposited mass per charge unit) behave like the equivalent masses ...

 
Detalles

Num.Producto: P1147500

Hidrógeno en las series redox: electrodo normal de hidrógeno

Principle

The redox series is one of the most important tools in "electrochemistry". The redox series arrange metals according to their efforts to emit electrons. The redox series generally begins with the base metals (e.g., iron, zinc) and goes to noble metals (e.g., gold, ...

 
Detalles

Num.Producto: P1148400

Relación entre la velocidad de reacción y concentración (Landolt reaction)

What you can learn about
  • Landolt reaction
  • reaction rate
  • reaction rate depends on concentration of reactants

 

 
Detalles

Num.Producto: P1149300

Detección de carbón con agua de cal

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 ...

 
Detalles

Num.Producto: P1149701

Comportamiento de la temperatura de los compuestos orgánicos

What you can learn about
  • Properties of organic compounds
  • Thermal stability
  • Many organic compounds are sensitive to heating

 

 
Detalles

Num.Producto: P1149800

Tautomería ceto-enol del acetoacetato de etilo

Principle

Keto-enol tautomerism is understood in chemistry as the equilibrium between the structural form of an aldehyde and a ketone (the compounds must be constitution isomers). The name "enol" reflects the double bond (-en) and the OH group (-ol) in the molecular structure.

In this ...

 
Detalles

Num.Producto: P1154000

Manómetro de tubo en forma de U

Principle

The suitability of a U-tube partially filled with liquid as an instrument for measuring pressure (manometer) it is to be demonstrated.

 

Benefits

  • Optimised for demonstration experiments: Transformation from horizontal into vertical direction
  • Very good visibility: Big ...
 
Detalles

Num.Producto: P1296700

Presión Hidrostática en tablero magnético

Principle

The dependence of the hydrostatic pressure on the depth of immersion h and on the density ρ of a liquid, and the relationship between the pressure p and the quantities h and p, are to be demonstrated.

Benefits

  • Optimised for demonstration experiments: Transformation from ...
 
Detalles

Num.Producto: P1296800

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