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Principle
In this experiment the reactivity of nitrogen with various metals is investigated. Nitrogen as a typical non-metal should react with metals to the corresponding salt in the form of an exothermic reaction. However metals react only very little with nitrogen. Nitrogen reacts at room ...
Ammonia (which is of technical and economic importance) is obtained from the reaction of nitrogen with hydrogen. But this reaction is strongly inhibited (high activation energy is needed to start the reaction) and leads normally to poor yields. Beacuse of this reason Fritz ...
In this experiment, the properties of graphite powder and diamond are examined and compared.
Benefits
In this experiment students investigate the formation of a complex compound. They recognize that a complex compound is already present in aqueous solution for many metal ions of the subgroup elements. The central ion is surrounded by a hydrath nozzle (water ...
The pH-value of a prepared salt solution can be predicted by the strength of the acids and bases which are part of the salt solution. Salts of equally strong acids and bases (e.g., NaCl) react neutral in aqueous solution. Salts of a weak acid / base and strong base / ...
During an electrolysis reaction, the deposited mass m of a substance is directly proportional to the flow of charge (First Faraday's law). The second Faraday law states that the electrochemical equivalents k (deposited mass per charge unit) behave like the equivalent masses ...
The redox series is one of the most important tools in "electrochemistry". The redox series arrange metals according to their efforts to emit electrons. The redox series generally begins with the base metals (e.g., iron, zinc) and goes to noble metals (e.g., gold, ...
Organic substances contain carbon and hydrogen atoms in their molecular structures. This is the reason why carbon dioxide and water is always produced when these substances are burned.
In this experiment, different organic substances are combusted and students investigate which ...
Keto-enol tautomerism is understood in chemistry as the equilibrium between the structural form of an aldehyde and a ketone (the compounds must be constitution isomers). The name "enol" reflects the double bond (-en) and the OH group (-ol) in the molecular structure.
In this ...
The suitability of a U-tube partially filled with liquid as an instrument for measuring pressure (manometer) it is to be demonstrated.
The dependence of the hydrostatic pressure on the depth of immersion h and on the density ρ of a liquid, and the relationship between the pressure p and the quantities h and p, are to be demonstrated.
PHYWE presenta la nueva unidad de rayos X: tecnología innovadora, máxima seguridad y comodidad.
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