Química Preparativa

Filtración, separación magnética

Principle

This experiment to be performed by students themselves, demonstrates how a mixture of salt and sand can be separated into its components. This involves adding some water to a mixture of solid salt and solid sand to make a suspension which is then poured through a fi ...

Destilación

Principle

In the experiment introduced here, a mixture of water and methylated spirits made up by students themselves is to be separated into its components. The alcohol contained in the mixture will be distilled and collected in a conical flask. The simple distillation ...

Dióxido de carbono, preparación y propiedades

Principle

Carbon dioxide can be obtained very simply from carbonates (e.g. marble) by dripping acid onto them. The properties of the gas obtained in this way can then be investigated with little difficulty. The student experiment described here demonstrates, among other th ...

Preparación de metano

Principle

With the help of the simple experiment set-up shown here, methane can be made from aluminium carbide and water. If the methane gas is collected in a test tube, it is then possible to investigate its properties.

Condensation of gases through an increase of pressure and through cooling

Principle

Gases are condensing when they are cooled and at high pressure. In this experiment butane is condensed by cooling it to ca. -15 °C. In the second part of the experiment butane is condensed by compressing it.

Tasks< ...

Separation methods for suspensions and solutions (decanta-tion, centrifugation, filtration, crystallisation)

Separation of mixtures of liquids and of solutions byextraction, stirring, centrifugation

Air- a mixture of the gases oxygen and nitrogen

Preparation of hydrogen

Sublimación y solubilidad del Iodo

Sulfuros - sulfuro de hidrógeno

Preparing ammonia for experimental purposes

Quantitative analysis of ammonia

Preparation of nitric oxide from nitric acid

Preparation of nitric acid from potassium nitrate and sul-phuric acid