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Term for a chemical reaction in which one atom or molecule emits electrons (oxidized) and another substance absorbs (reduces) these electrons. With the oxidation is always always a reduction connected. Both processes together are partial reactions of a so-called redox reaction, Originally, the oxidation was only the chemical reaction of a substance with oxygen Roger that. Later, the term was extended to include reactions in which hydrogen atoms are removed from a compound (dehydrogenation).

Oxidizing agents are those substances that can easily absorb electrons, such as oxygen. chlorine and fluorine. The oxidizing agents are reduced in the redox reaction itself. And reducing agents are those substances that easily release electrons, such as hydrogen, carbon and base metals like iron. magnesium and sodium, The reducing agents are themselves oxidized in the redox reaction. In the winemaking Oxidation should only take place in the most precisely dosed and controlled form, because uncontrolled occur frequently wine faults on.

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