An oxidant for obtaining electrons.
Oxidant and reductant are interdependent and never give up.
The first two lines can also be: oxygen loss above, return below.
Explanation: As the valence increases, the lost electrons are oxidized, which acts as a reducing agent. Electrons with lower valence are reduced and act as oxidants themselves.
Homophonic memory method of rising, deoxygenation and deoxygenation: teachers and students returning to Yang (valence rising, electron loss, oxidation reaction, reducing agent being oxidized)
Reduction to redox (valence reduction, electron acquisition, reduction reaction, oxidant, reduction)
Reducing agent-increasing price-losing electrons-being oxidized-undergoing oxidation reaction-generating oxidation products;
Oxidant-valence reduction-electron acquisition-reduction-reduction reaction-generation of reduction products.
Standardize the valence first, then look at the price change, change the bridge,
When there is no oxygen, the index rises, the index falls, the electron transfer number, the original number multiplied by the valence change.
Definition, properties and characteristic formula of redox reaction;
Hypoxia rises and falls; If we say agency, the two are opposites.
"oxygen pride." "Still frustrated" (oxidant, gaining electrons, reductant, losing electrons).
Extended data:
Physical concept
In inorganic reaction, the chemical reaction in which the valence of elements rises or falls, that is, electron transfer (gain or loss or deviation), is a redox reaction. In organic reactions, the action of introducing oxygen or dehydrogenating organic matter is called oxidation reaction, and the action of introducing hydrogen or losing oxygen is called reduction reaction.
The reactions of oxidation and reduction are simultaneous, that is, when the oxidant oxidizes the oxidized substance, it is also reduced. The reducing agent itself is oxidized when reducing the reduced object.
The redox reaction is characterized by the rise and fall of the valence of elements, and the essence is electron transfer.
Judgment basis
In the process of inorganic reaction, elements with electrons (or electron pair deviation) are reduced, and elements without electrons (or electron pair deviation) are oxidized. When organic matter reacts, the action of introducing oxygen or dehydrogenating organic matter is called oxidation, and the action of introducing hydrogen or losing oxygen is called reduction.
That is to say, it depends on whether it loses electrons (or electron pair deviation), gains electrons (or electron pair deviation) or its valence increases or decreases.
Among the reactants, it is the reducing agent that loses electrons (or deviates from electron pairs), and its valence increases. The obtain electrons (or electron pair bias) are oxidant, and their valence decreases.
Among products: the oxidized product is called oxidation product, and its valence increases during the reaction. The reduction product is called reduction product, and its valence is reduced during the reaction.
Generally speaking, among oxidants, reductants, oxidation products and reduction products, oxidants have the strongest oxidizability and reductants have the strongest reducibility. It can be used to judge the occurrence of redox reaction.
References:
Baidu encyclopedia-redox