What is oxidation reaction in chemistry

A substance loses electrons after reacting with an oxidant to produce corresponding oxidation products. Increased valency.

Oxidation Reaction The electron loss of a substance is called oxidation reaction; The function of gaining electrons is called reduction. Oxidation in the narrow sense refers to the combination of substances and oxidation; Reduction refers to the action of a substance losing oxygen. The oxidation value increases during oxidation; The oxidation value decreases when reduced.

Oxidation, reduction both refer to reactants (molecules, ions, or atoms). Oxidation is also known as oxidation or oxidation reaction. When organic matter reacts, the effect of introducing organic matter into oxygen or removing hydrogen is called oxidation; The action of introducing hydrogen or losing oxygen is called reduction.

The oxidation of a substance that reacts slowly with oxygen and slowly heats up without emitting light is called slow oxidation, such as metal rust, biological respiration, etc. Intense luminous oxidation is called combustion. When the general substance oxidizes with oxygen, it is exothermic, and some may absorb heat such as the reaction between nitrogen and oxygen.

In electrochemistry, the anode is oxidized and the cathode is reduced. According to the different oxidants and oxidation processes, the oxidation reaction is mainly divided into air (oxygen) oxidation and chemical reagent oxidation. Chemical reagent oxidation has the advantages of good selectivity, simple process, convenience and flexibility, etc., in the field of pharmaceutical and chemical industry, due to the small tonnage of the product, the chemical reagent oxidation method is mostly used.

The oxidants used in the oxidation of chemical reagents include inorganic oxidants and organic oxidants, inorganic oxidants include: metal oxides, metal salts, nitric acid, sulfuric acid, sodium chlorate, ozone, hydrogen peroxide, etc.; Organic oxidants are generally tempered oxidants, including nitros, nitros, peroxyacids, and complex oxidants formed with inorganic oxides. Here are a few commonly used oxidants:

Potassium permanganate has strong oxidation, and can oxidize the alkyl groups of primary alcohols, aldehydes, and aromatic ring side chains into acids. Manganese dioxide is a milder oxidizing agent that oxidizes methyl groups in the side chains of aromatic rings to aldehydes. The pyridine complex of chromium trioxide is a relatively mild oxidizing agent that can oxidize primary alcohols to aldehydes without breaking carbon-carbon double bonds and other groups.

Oxidation reaction, example 2mg+O2=2mg0 c+O2=CO2 2H2 + O2 = 2H2O S + O2 = SO2

The reaction in which the valency changes before and after an atomic reaction is a redox reaction.

The reactions that occur in the air or in pure oxygen are called oxidation reactions.

Reactions with oxygen are called oxidation reactions.