How to judge the strength of the electrolyte, and how to judge the strength of the electrolyte?

Compounds that can conduct electricity when dissolved in water or in the molten state are electrolytes. This definition can be broken down into three elements: melting or dissolving.

It can conduct electricity. Compound. However, when judging the strength of electrolytes, it is not clear which covalent compounds with polar bonds are strong electrolytes and which are weak electrolytes.

What are the bases for judging strong and weak electrolytes?

Generally speaking, strong and weak electrolytes can be judged from the following three aspects: Degree of ionization. Chemical bonds.

Compound genus. When there is a contradiction between these three aspects, the main distinguishing criterion is the degree of ionization, that is, the electrolyte that is completely ionized is a strong electrolyte. Partially ionized electrolytes are weak electrolytes.

Distinguish strong and weak electrolytes from chemical bonds and genus of compounds.

1) Compounds with ionic bonds and strong polar bonds are strong electrolytes. (2) Salts, strong alkalis, and strong acids are strong electrolytes. (3) Compounds with weakly polar covalent bonds are weak electrolytes. (4) Weak acids and weak bases are weak electrolytes.

It should be noted that: (1) BaSO4 in aqueous solution is almost non-conductive due to its very small solubility, while a small fraction of dissolved BaSO4 is completely ionized and conducts electricity when melted. Therefore, BaSO4 is a strong electrolyte that is insoluble.

2) When CO2, SO2 and NH3 are dissolved in water, the generated H2CO3, H2SO3 and NH3·H2O can conduct electricity, and CO2, SO2 and NH3 cannot be said to be electrolytes, but can only be said to be H2CO3, H2SO3 and NH3·H2O are electrolytes and are weak electrolytes. (3) HF (hydrofluoric acid) contains strong polar bonds, and its aqueous solution has a small degree of ionization due to factors such as hydrogen bonds, so hydrogen fluoride is a weak electrolyte. (4) There is no direct relationship between the strength of conductivity and the judgment of strong or weak electrolyte.

Because a strong electrolyte with a very thin concentration can also be very weakly conductive, and a weak electrolyte with a certain concentration can also be more conductive. Even for weak electrolytes, the conductivity changes as the concentration decreases.

In summary, strong and weak electrolytes cannot be classified according to the intrinsic properties of substances, and the main basis for judgment is whether they can be completely ionized in aqueous solution.

The formula for judging electrolytes is as follows, 1. Salts, strong alkalis, and strong acids are strong electrolytes. 2. Weak acids and bases are weak electrolytes. (3) Compounds with weakly polar covalent bonds are weak electrolytes. 4. Compounds with ionic bonds and strong polar bonds are strong electrolytes.

Determine the electrolyte formula.

In summary, strong and weak electrolytes can be judged from three aspects: ionization degree, chemical bond, and compound genus, and in addition, the three elements that distinguish strong and weak electrolytes are melting, electrical conductivity, and compounds.

Electrolytes generally refer to compounds that are dissolved in aqueous solution or can conduct electricity in the molten state, and are divided into two categories: strong electrolytes and weak electrolytes according to the degree of ionization, and almost all of them are ionized strong electrolytes.

Strong electrolytes include active metal oxides, sulfuric acid, calcium carbonate, copper sulfate and other substances, weak electrolytes include a small amount of salt, acetic acid, ammonia monohydrate, lead acetate, mercuric chloride and other substances, in addition, water is extremely weak electrolyze.

The strength of electrolytes can be judged from the following three aspects: Degree of ionization. Chemical bonds. Compound genus.

Electrolytes are defined as compounds that conduct electricity when dissolved in water or in a molten state.

When there is a contradiction between the above three aspects, the main distinguishing criterion is the degree of ionization, that is, the electrolyte that is completely ionized is a strong electrolyte. The electrolytes of some electric birds are weak electrolytes.

Distinguish strong and weak electrolytes from chemical bonds and genus of compounds. Compounds with ionic and strongly polar bonds are strong electrolytes; Salts, strong bases, and strong acids are strong electrolytes; Compounds with weakly polar covalent bonds are weak electrolytes; Weak acids and bases are weak electrolytes.

Judgment method: 1. Electrolyte is a compound that can be ionized under certain conditions, while non-electrolyte cannot be ionized.

2. Common substance categories: electrolytes are generally acids, alkalis, salts, typical metal oxides and some non-metal hydrides. Non-electrolytes are typically non-metallic oxides, some non-metallic hydrogen-positives, and the vast majority of organic compounds.

Some covalent compounds can also conduct electricity in aqueous solutions, but there are also solid electrolytes that are conductive** related to the migration of ions in the crystal lattice.

According to the degree of ionization, it can be divided into strong electrolyte and weak electrolyte, almost all of which are ionized by strong electrolytes, and only a small part of which are ionized by weak electrolytes.