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There are different groups of substances to which substances are assigned according to their characteristic properties. The film shows what these properties are, namely the state of aggregation, the melting or boiling temperature, metallic sheen, hardness, density, solubility and finally conductivity.

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The global carbon cycle - the process by which carbon gets moved around between Earth´s atmosphere and biosphere - can be divided up into a geological and a biological carbon cycle. This video explains both of them and gives insight into the risks to Earth´s equilibrium brought on by burning fossil fuels.

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We encounter sodium in various forms in many places in everyday life, including the kitchen. The film introduces sodium and sodium hydroxide, points out their differences, and demonstrates their material properties by means of experiments. The very different uses of the reactive element are also shown.

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Chemical equilibriums occur when reversible reactions take place in a closed system. Most chemical reactions are not only unidirectional, but are rather reversible. Chemical and dynamic equilibrium are demonstrated with various experiments. The equilibrium constant is explained and the law of mass action described.

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The simplest compounds in organic chemistry are the hydrocarbons. The film introduces the first alkanes (saturated hydrocarbons) and alkenes (unsaturated hydrocarbons) and explains their differences and properties. The substances can occur in many variants, which have correspondingly different properties.

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Materials that by their mere presence can enable or speed up reactions that would either not even happen at all or take much longer to run without them are called catalysts. Catalysts are not involved in those reactions and come out untouched. They lower the activation energy and therefore speed up the reaction rate.

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Carbon can form multiple bonds with itself and other substances, making it one of the most versatile elements. This becomes particularly apparent in organic carbon compounds. Examples include the carbohydrate group but also petroleum, natural gas and coal, which are made up of the remains of plants and animals.

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Chemical reactions take different forms: It pops or bubbles, but sometimes a reaction is barely visible. The film shows the common features of chemical reactions: Starting material and product, exothermic and endothermic reactions as well as the most important influencing variables of chemical reactions.

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As an alternative to petroleum, the possibilities of biomass are now being explored. The film presents biomass gasification and energy generation from biomass, explains how they work and names the advantages, but also the disadvantages of the new processes, which have not been sufficiently researched for a long time.

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A water molecule, one of the most important solvents, is made up of two hydrogen and one oxygen atom. Due to the position of the atoms, the electrical charge in the molecule is asymmetrical. The hydrogen molecule has an electrical plus and negative pole. The film shows what water´s property as a solvent is all about.

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With a density of only around 2.7 g/cm^3, aluminium is one of the lightest metals. It is the third most abundant element in Earth's crust, is very soft, has a low melting point and excellent conductivity, making it one of the most versatile materials used in construction, packaging, and electrical engineering.

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The six alkaline earth metals - beryllium, magnesium, calcium, strontium, barium, and radium - rank among the most reactive elements, coming in second after alkaline metals. They don´t occur in their elemental state. This video shows the properties and reactions of alkaline earth metals in different experiments.

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Topic of this film is the reaction of water with different substance groups, acidic and alkaline solutions. Substances that give off protons when they react with water are called acids, and substances that take up protons in a reaction with water are called bases. Gaseous acids and bases are often extremely soluble in water.

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Due to its properties, the element zinc is an important working metal and in combination with other metals plays an important in metalworking. The film presents zinc´s properties and how it reacts with acids and bases. It also looks into the role of zinc in electrochemistry and in the human body´s metabolic processes.

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This film is about the organic compounds we call alcohols. Alcohol is not a human invention - it occurs naturally wherever yeast spores find the right conditions to reproduce. The video shows the molecular structure of alcohols, the differences between them, explains their properties and uses and looks at their production.

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The first group of the periodic table consists of hydrogen and the six alkali metals lithium, sodium, potassium, rubidium, caesium, and francium. With only one electron in their outer shell, alkali metals are very reactive. This film explains some of the most important properties of the alkali metals.

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Wasser ist der einzige Stoff, der auf der Erde natürlich in allen drei Aggregatzuständen vorkommt: flüssig, fest und gasförmig. In diesem Video geht es um die physikalischen Eigenschaften von festem Wasser - also Eis. Unter anderem geht es um die Dichteanomalie, Druckaufschmelzung und Kristallisationskerne.

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The air we breathe consists of nitrogen, oxygen, very little carbon dioxide and numerous other substances. The film explains what its composition is and how people have explored it over time. Another topic of the video are the five different layers that make up the vital atmosphere around the earth.

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Menschen sind schon früh auf die Idee einer atomaren Struktur der Materie gekommen. Der Film vollzieht diese Geschichte nach und erklärt den Unterschied zwischen der relativen und der absoluten Atommasse. Außerdem werden Situationen aufgezeigt, für die die Bestimmung relativer Atommassen wichtig ist.

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Die Oberfläche der Erde ist zu rund zwei Dritteln von Wasser bedeckt. Kein anderer Stoff kommt natürlich auf der Erde flüssig, fest und gasförmig vor. In diesem Video geht es um die physikalischen Eigenschaften von flüssigem Wasser. Beleuchtet werden unter anderem die Kohäsion, sowie der Siedepunkt und der Gefrierpunkt von Wasser.

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The substances dealt with in chemistry almost never occur in pure form naturally. Even substances that we consider to be "pure" contain admixtures of other substances. Topics of this film are the different mixtures of solid, liquid and gaseous substances and their different types of heterogeneous and homogeneous mixtures.

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Electroplating, colloquially known as galvanising, is the electrochemical deposition of metal layers on so-called substrates - for example, coating a piece of metal with a usually very thin layer of a more noble metal. The process is named after the man who discovered it, the Italian doctor Luigi Galvani.

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Copper is one of the metals humans have been using the longest. In nature, it can be found in its pure form as nuggets, and humans began using it 10,000 years ago. Copper can be worked easily when smelted and cast. Using various experiments, this film demonstrates copper´s properties and its reactions with other substances.

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Imagining modern life without plastics is almost impossible. We use them in construction, as food packaging, paints, or clothing. Polymerization is the reaction used in their manufacture. This video takes a closer look at how monomers are combined to form polymers and gives a brief overview over the history of plastics.

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This film is about the technical limestone cycle. Limestone is mined and processed industrially. Carbon dioxide bound in limestone is dissolved and forms calcium oxide. When water is added, calcium carbonate forms in an exothermal reaction. It reacts with carbon dioxide in the air, forming calcium carbonate again.

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The natural limestone cycle: Carbonated water flows over limestone, the calcium carbonate reacts with the carbonic acid and forms calcium hydrogen carbonate. When this water evaporites, the mixture of dissolved carbon dioxide, carbonic acid and calcium hydrogen carbonate turns back into calcium carbonate and carbon dioxide.

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Nitrogen from the Earth´s atmosphere is converted by bacteria and then processed by plants. Humans and animals ingest these nitrogen compounds in their food. The nitrogen is returned to the soil in animal excrement that contains urea and in rotting plants. This film shows the nitrogen cycle and the Haber-Bosch process.

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White deposits on water taps and scale in kettles are the result of hard water. Water hardness is a measure of the concentration of calcium and magnesium ions in water. This film shows how water hardness is measured and which consequences the hardness of water has. Also methods for softening water are shown.

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Each element has a name. The subject of this film is how the naming is done. The names consist of the names of the elements in combination with a multiplication affix and a suffix. This film explains the nomenclature (i.e., the naming system) of inorganic compounds in an entertaining and step-by-step manner.

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Oxidation is a chemical reaction. It runs when a candle is burning or a rocket is launched. An old rusted iron fence is actually the result of oxidation. And oxidation reactions even take place in our bodies. In this video, the characteristics of chemical reactions are explained and illustrated through different examples.

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