Comparison of oxidation and reduction, how to judge oxidation and reduction

Loss of oxidation, reducing agent.

Reduced to oxidant.

Look at the valency of the element: if the element appears the most, there is only oxidation, no reduction, such as ferric; If the valency of the element has the lowest valence, it is only reducible, not oxidizing, such as -2 valent sulfur; If it is an intermediate valence state, in general, there are both oxidizing and reducing properties. For example, 2-valent iron can be oxidized to 3-valent iron and exhibit reductivity, and can be reduced to elemental iron and exhibit oxidation.

In addition, the redox property of a substance is strictly the properties of the elements in the substance, so if there are both oxidizing and reducing elements in the same substance, the substance can be both oxidized and reduced, depending on which element is at work.

Order of metal mobilityFor metal reducing agents, the reducibility of metal elements is generally consistent with the order of metal activity, that is, the more metal in the back, the less likely it is to lose electrons, and the weaker the reducibility. Order of metal activity (common elements): K>Ca>Na>Mg>Al>mn>Zn>Cr>Fe>Ni>Sn>Pb>(H)>Cu>Hg>Ag>PT>AU

The above content reference: Encyclopedia - Reductiveness.

Oxidation refers to the ability of a substance to gain electrons, and reducibility refers to the ability of atoms, molecules, or ions to lose electrons in a chemical reaction.

A method for judging the oxidation of different substances formed by the same element and the strength of the reduction.

1. Judge according to the valency of the elements.

The most ** only has oxygen nucleation corruption, the lowest valence is only reducing, and the intermediate valence has both oxidation and reducibility.

2. Judge according to the concentration of the substance.

The greater the concentration of an oxidizing (or reducing) substance, the stronger its oxidizing (or reducing) and vice versa.

Methods for judging the oxidation of different substances or different elements, and the strength of reduction:

1. Judging according to the chemical equation.

Oxidation: Oxidation products.

Reducibility: Reduced product.

2. Compare according to the order of material activity.

For metal reducing agents, the reducibility of metal elements is generally consistent with the order of metal activity.

For metal oxidation, the order of metal cation oxidation is the opposite of the order of metal cation oxidation.

3. Comparison of the acidity and alkalinity of hydrates according to the most ** oxides of the elements.

The more acidic it is, the more oxidizing the corresponding element is.

The stronger the alkalinity, the stronger the reduction of the corresponding element<>

1. Oxidation vs reduction.

2. Oxidation: the ability of a substance to obtain electrons. Reducibility: The ability of a substance to lose electrons.

3. The strength of the oxidation and purification reduction of a substance depends on the difficulty of gaining and losing electrons, and has nothing to do with the number of electrons gained and lost.

4. The method for judging the strength of oxidation and bridging reducibility, the order of element activity, the order of metal activity, according to the order of metal activity, the reduction of elemental matter is getting weaker and weaker, and the oxygen noise of the corresponding cation is becoming stronger and stronger.

5. Order of non-metal activity: According to the order of non-metal activity, the oxidation of the element is getting weaker and weaker, while the reduction of the corresponding anion is gradually increasing. According to the position of the elements in the periodic table.

6. Elements of the same period: the reducibility of the element is gradually weakened, and the oxidation is gradually enhanced. The oxidation of the corresponding cation gradually increases, while the reduction of the anion gradually decreases.

7. Elements of the same main group: the oxidation of the element is gradually weakened, and the reduction of the corresponding anion is gradually enhanced.

Oxidation refers to the ability of a substance to gain electrons. Substances in the ** state and active non-metallic elements (such as fluorine, chlorine, oxygen, etc.) are generally oxidizing, while substances in the low-valence state are generally reducible.

Reducibility refers to the ability of an atom, molecule, or ion to lose electrons in a chemically deficient reaction. The stronger the electron-losing ability of the particles contained in the substance, the stronger the reducibility of the substance itself; Conversely, the weaker it is, the weaker its reducibility will be.