How to tell if a substance is salty in chemistry

To be exact. Salts are a class of compounds composed of metal cations (including ammonium) and acid ions.

When ionized, all cations are metal ions, and all anions are acid ions, which are salts. Cations can be either root ions or salts, such as NH4NO3.

As long as it is a compound composed of a metal cation and a certain anion, it is usually a salt.

1. The non-aqueous substances prepared by acid-base reaction are salts if they can be prepared.

2. Salt needs to have acid ions and metal cations or ammonium ions.

3. The one that can ionize ions in the molten state is salt.

Salts refer to a class of compounds in which metal ions or ammonium ions are combined with acid ions or non-metal ions. Such as sodium chloride, calcium nitrate, ferrous sulfate and ammonium acetate, calcium sulfate, copper chloride, sodium acetate, etc.

Salinity is a chemical property.

For billions of years, large quantities of chemicals from land have been dissolved and stored in the oceans. If the entire ocean were to evaporate, the remaining salt would cover the entire planet up to 70 meters thick.

According to the determination, there are 11 chemical substances with the most abundant content in seawater: sodium, magnesium, calcium, potassium, strontium and other five cations; Chlorine, sulfate, bicarbonate.

Including carbonate), bromine and fluorine.

and boric acid molecules. The top three are sodium, chloride and magnesium. In order to indicate the amount of chemicals in seawater, it is usually expressed in terms of seawater salinity.

Color. The color of the salt can be pure and transparent (e.g., sodium chloride.

Opaque or chained clumps are metallic (e.g., pyrite).

In most cases, the transparency or opacity of the salt surface is only related to the single crystals that make up the salt. When light hits the salt, it is bounded.

The boundaries between the crystals are reflected, and the large crystals will appear transparent, and the polycrystals will look more like white powder when they are clustered together.

The above content reference: Encyclopedia - salt.

To determine whether a salt is acidic or alkaline, it is first necessary to determine whether the salt can be hydrolyzed.

Salts are made up of metal cations and acid anions.

When metal cations belong to weak base ions, such as copper ions, aluminum ions, iron ions, ferrous ions, etc. And acid ions are strong acid ions, such as sulfate ions, nitrate ions, chloride ions, etc. These salts are strong acids and weak alkaline salts, which are acidic.

For example: ferric chloride, copper nitrate, aluminum sulfate, etc., which are all acidic.

On the contrary, if the metal cation is a strong base ion and the acid ion is a weak acid ion, these salts are strong base weak acid ions and are alkaline.

For example: sodium acetate, sodium carbonate, sodium bicarbonate, etc., which are all alkaline.

If the metal cation is a strong base ion and the acid ion is a strong acid ion, these salts are strong acid salts. Neutral.

For example: sodium chloride, sodium sulfate, etc.

As for why, I won't say. You can see Salt Hydrolysis in Elective 4.

If it is not a salt, then it must be an acid or a base. Acid is hydrogen atom + acid ion, and base is metal ion + hydroxide. ,2,

Salts belong to chemical compounds because:

1. Salt refers to a class of compounds in which metal ions or ammonium ions are combined with acid ions or non-metal ions. Such as sodium chloride, calcium nitrate, ammonium acetate, etc., generally speaking, salt is the product of metathesis reaction (salt and salt spring slag reaction to form new salt and new salt, salt and alkali reaction to form new salt and new alkali, salt and acid reaction to form new salt and new acid), such as sulfuric acid and sodium hydroxide to produce sodium sulfate and water, sodium chloride and silver nitrate reaction to form silver chloride and nitric acid, etc.;

2. There are also other reactions that can generate salts, such as displacement reactions. The solution of soluble salts is electrically conductive and is a source of Zen because there are ions in the solution that can swim freely, so they can be used as electrolytes. Salt is divided into single salt and combined salt, single salt is divided into normal salt, acid salt, alkaline salt, combined salt is divided into double salt and complex salt;

3. The acid salt contains hydrogen ions in addition to metal ions and acid ions, and the basic salt also contains hydrogen oxide ions in addition to metal ions and acid ions.