Other chemistry

Model experiment on the fractional distillation of petroleum

Principle

When the model experiment on the distillation of petroleum is conducted using the comprehensive chemistry/biotechnology experiments system, the glass equipment clearly stands out against the dark background of the large-format base plate.  The strong contra ...

Column chromatography - separation of leaf pigments

Principle

In this investigation, a uniformly green raw extract of fresh leaves is first separated into different fractions by means of column chromatography. To do so, the extract is added to a column filled with starch and drawn through the column under slightly reduced ...

Faraday's laws

Principle

Passing an electric current through a solution can cause chemical reactions. Here the current is the driving force of the redox reactions that occur.
If ions are added to water to make it conductive and that water is then electrolysed, hydrogen collects at ...

Avogadro's law

Air analysis (nitrogen in air)

Obtaining vegetable oils by extraction

Boiling point elevation

The contact process

Synthesis of water

Principle

In the apparatus, hydrogen is burned in a pure oxygen atmosphere, whereby water is generated as a reaction product. In a complete conversion, 100 ml of hydrogen combines with 50 ml of oxygen, i.e. the volume ratio of the reaction is 2 to 1.

2 H_{2< ...}

Immobilised cells in the service of biotechnology - micro-bial synthesis of acetic acid with Acetobacter aceti