Preparative Chemistry

Preparation of nitric oxide from nitric acid

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

The charcoal filter and its practical application

Hydrogen chloride I

Fractional petroleum distillation

Preparation of ethylene (ethene)

Preparation of p-toluenesulfonic acid

Aldehydes - reactions with ammonia

Ester saponification

Production of soup seasoning

Composition of starch

Principle

Starch consists of the polysaccharides amylose and amylopectin. Their different solubility in water makes it possible to separate these two components from one another by heating the starch with water and pouring the warm solution through a pleated filter. Du ...

Obtaining vegetable oils by extraction

Quantitavie determination of fat

Principle

The discussion of healthy nutrition focuses on the fat content of foodstuffs. For this reason, it is important to know the exact fat content of individual foodstuffs. The experiment shown here presents a method for the quantitative determination of the fat conte ...

The purity of fats

Principle

A small share of vegetable and animal fats cannot be saponified. For this reason, that part is referred to as the 'unsaponifiable' component. It is a mixture of different organic substances such as hydrocarbons, sterols, dyes and vitamins. In order to determine ...

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 ...