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results

Dünnschichtchromatographie

Chromatografische Verfahren sind physikalische / chemische Trenntechniken von Stoffen.

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Lerneinheit Chemie 8 – Kalk

In unserem Arbeitsheft „Lerneinheit Chemie 8 – Kalk“ finden Sie 10 interaktive und didaktisch aufbereitete Aufgaben zum Thema Kalk.

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Chemische Bindungen

Chemische Bindungen sind ein zentrales Element der Chemie. Unter der Bezeichnung „Chemische Bindung“ versteht man im Allgemeinen den Zusammenhalt der kleinsten Teilchen in chemischen Stoffen. Wenn also zwei oder mehrere Atome oder Ionen stark miteinander verbunden sind, liegt eine Chemische Bindung vor.

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World of Crystals

What have salt, iron, diamonds and a snow flake in common? At first glance, not very much.

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Wasserstoff

Wasserstoff ist das häufigste Element im Universum. Auf der Erde ist der Wasserstoff größtenteils in Verbindung mit Sauerstoff im Wasser gebunden.

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Halogens

The compounds of halogens are - with the exception of astatine - widespread, can be encountered in nature and are versatile substances. This fact is taken up on this DVD in order to teach the students the chemistry of the halogens by illustrating their special qualities and explaining the correlation of their structure with their chemical properties. In the first part, an overview of the element group of halogens lays emphasis on the common as well as on the distinguishing characteristics of fluorine, chlorine, bromine and iodine. In a second part, the specific properties of fluorine and chlorine are presented. This topic is linked to the students‘ everyday experience (fluorine as a protection against caries, chlorine as a disinfectant, etc.) on the one hand. On the other hand, the DVD presents carefully selected experiments. As a rule, they are of a kind that can only be realized with difficulty, or high expenditure in the chemistry classroom. With the help of these experiments, students are introduced to the chemistry of the halogens in a way that enables them to draw conclusions on the basis of their observations.

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Chemie im Haushalt

Backen, Abwaschen, reinigen, – ganz normale Tätigkeiten im Haushalt. Dazu nutzen wir meist vielfältige Helfer wie Back- und Reinigungsmittel. Die Allgegenwärtigkeit von Chemie und der damit verbundenen chemischen Reaktionen sind uns oft nicht bewusst.

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Halogens

The compounds of halogens are - with the exception of astatine - widespread, can be encountered in nature and are versatile substances. This fact is taken up on this DVD in order to teach the students the chemistry of the halogens by illustrating their special qualities and explaining the correlation of their structure with their chemical properties. In the first part, an overview of the element group of halogens lays emphasis on the common as well as on the distinguishing characteristics of fluorine, chlorine, bromine and iodine. In a second part, the specific properties of bromine and iodine are presented. This topic is linked to the students‘ everyday experience on the one hand (bromine as a catalyst for reactolite sunglasses, iodine as an agent in medicine, etc.) on the one hand. As a rule, they are of a kind that can only be realized with difficulty, or high expenditure in the chemistry classroom. With the help of these experiments, students are introduced to the chemistry of the halogens in a way that enables them to draw conclusions on the basis of their observations.

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Chemie im Haushalt

Backen, Abwaschen, reinigen, – ganz normale Tätigkeiten im Haushalt. Dazu nutzen wir meist vielfältige Helfer wie Back- und Reinigungsmittel. Die Allgegenwärtigkeit von Chemie und der damit verbundenen chemischen Reaktionen sind uns oft nicht bewusst.

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Acids and Bases

We can find acids and bases in every supermarket, some of them in our food, others in cleaning agents. In everyday products, acids and bases as well as acidic and alkaline reacting salts have extremely different functions. In food, acids are either present or added as flavouring agents such as citric acid, tartaric acid and acetic acid, as antioxidants such as ascorbic acid or generally as acidifiers, sequestrants (citric acid and tartaric acid) and preservatives (acetic acid).

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Wie Chemiker arbeiten

Chemie begegnet uns permanent im Alltag, beim Kochen, Putzen oder Backen.

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Basics of Chemistry II

When we take a closer look at substances, we discover that they consist of either one single element or of mixtures of several elements. Chemists therefore divide the world of substances into pure and mixed chemical substances. A pure substance is of homogeneous composition. Substance mixtures, however, consist of two or more pure substances. The many mixtures are subdivided not only into homogeneous and heterogeneous mixtures but depending on the respective aggregate states of their components, are classified into various groups of mixtures.

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