The solution must be a mixture? Is the solution a mixture

Right. The solution is composed of solutes and solvents. Two or more substances form a mixture.

A solution is defined as a mixture of at least two substances.

First, a stable mixture, and the mixture is homogeneous.

1. Stable. The solution must have a solvent and a solute.

So it must be a mixture.

Yes, there is at least one solution and one solute.

A solution is made up of solutes and solvents, which are different substances.

For me sure.

Distilled water is not a solution.

Yes, because the solution requires a solvent and only one solute is not a solution.

The solution is a mixture. A solution is composed of one or several substances dispersed into another.

1. A stable mixture in which the dispersed substance (solute) is dispersed in molecules or smaller particles in another substance (solvent).

A solution is composed of one or several substances dispersed into another.

1. A stable mixture in which the dispersed substance (solute) is dispersed in molecules or smaller particles in another substance (solvent). Substances have three states at room temperature: solid, liquid, and gas. Therefore, there are three states of solution, the atmosphere itself is a gaseous solution, and the solid solution mixture is often called a solid solution, such as an alloy.

General solution simply refers specifically to liquid solution. There are two types of liquid solutions, namely electrolyte solutions that are capable of conducting electricity and non-electrolyte solutions that are not. The so-called colloidal solution should be more precisely called a sol.

Among them, the solute is equivalent to the dispersion, and the solvent is equivalent to the dispersant. Common solutions in life include sucrose solution, iodine wine, clarified lime water, dilute hydrochloric acid, salt water, air, etc.

1. Solubility: dissolved substances (e.g., salt and salt are solutes when salt and water are configured).

2. Solvent: a substance that can dissolve other substances (for example, salt and water are used to configure brine, and water is the solvent).

3. When two solutions are miscible with each other, the one with a large amount is generally called a solvent, and the one with a small amount is called a solute.

4. When two solutions are miscible with each other, if one of them is water, water is generally called a solvent.

5. Solids or gases are soluble in liquids, and liquids are usually called solvents.

Among them, water (H2O) is the most commonly used solvent and can dissolve many substances. Gasoline, alcohol, chloroform, banana water are also commonly used solvents, such as gasoline can dissolve grease, alcohol can dissolve iodine and so on.

A solution is formed by the mixing of two or more substances, so a solution is a mixture.

Expand your knowledge

The mixing of two or more substances to form a homogeneous and stable dispersion system is called a solution. The solution can be in liquid form or in gaseous and solid state. For example, air is a gaseous solution, and solid solution mixtures are often called solid solutions, such as alloys.

In general, compounds that can dissolve other substances are called solvents, and substances that are dissolved are called solutes.

When a gas or solid is dissolved in a liquid, the liquid is called a solvent and a gas or solid is called a solute. When two liquids dissolve each other, the large amount is generally called the solvent, and the small amount is called the solute.

Solution classification

Saturated solution: A solution in which the solute cannot continue to be dissolved in a certain temperature and a certain amount of solvent. Unsaturated solution: A solution in which the solute can continue to be dissolved in a certain temperature and a certain amount of solvent.

Interconversion of saturated and unsaturated solutions:

Unsaturated solutions can be converted into saturated solutions by increasing the solute (which is applicable to all solutions) or decreasing the temperature (for most solutes where the solubility increases with temperature, and vice versa), evaporating solvents (when the solvent is liquid).

Saturated solutions can be converted to unsaturated solutions by increasing the solvent (for all solutions) or by increasing the temperature (for most solutes whose solubility increases with temperature, and vice versa, by decreasing the temperature, such as lime water).

A regular solution is one that is closer to the actual solution. Its formation is consistent with that of an ideal solution except that the mixed entropy is not equal to zero. The thermodynamic laws derived from regular solutions are widely used in non-electrolytic solutions, especially for many alloy solutions.

Therefore, the theory of regular solutions is very important for metallurgy and metal materials science.

Formation mechanism

The process of solution formation is accompanied by changes in energy, volume, and sometimes color. Dissolution is a special physicochemical change that is divided into two processes. One is the discrete discrete of solute molecules or ions, a process that requires endothermic heat to overcome the intermolecular attraction while increasing the volume; The second is the combination of solvent molecules and solute molecules, which is an exothermic process with a decrease in volume.

The whole process is a combination of two aspects.

A mixture is a substance consisting of two or more pure substances (elements or compounds) that have not been chemically synthesized.

A solution is a mixture that is composed of at least two substances.

1. Stable mixture

If you're doing the problem yourself, remember that a mixture is a mixture of at least two or more substances together, for example: a gas made by mixing CO2 and O2, a gas mixed with O2 and O3 mixed together, and if the question says that only one substance is not a mixture.

If there is a precipitate, the part of the precipitate cannot be regarded as a solution, if it is a suspension or something, it cannot be regarded as a liquid, and there are particles attached to the liquid, and these precipitates must also be excluded.

complexesPresent in ionic form in aqueous solution.

Coordination compound.

It is a class of compounds with a characteristic chemical structure, which consists of a central atom (or ion, collectively referred to as a central atom) and a molecule or ion that surrounds it (called a ligand ligand) through a coordination bond completely or partially.

Formed by combination. It contains complex molecules or ions formed by the combination of a central atom or ion with several ligand molecules or ions with coordination bonds, commonly known as coordination units. All compounds that contain coordination units are called coordination compounds.

The chemical branch of the complexes in which is studied is called coordination chemistry.

Stability: In general, the stability of a coordination compound mainly refers to the thermal stability and whether the complex is easy to ionize its components in solution (silver atoms and ligands). The coordination body can weakly dissociate a very small amount of central atoms (ions) and ligands in solution, e.g. Cu(NH3)42+ can dissociate a small amount of Cu2+ and NH3:

Dissociation equilibrium of coordination bodies in solution with weak electrolytes.

The ionization equilibrium is very similar, and there is also a dissociation equilibrium constant of its huaikuo, which is called the greater the stability constant of the complex, the more stable the complex, that is, the degree of dissociation in aqueous solution is small.

The solution is a mixture.

Pure matter refers to a substance composed of a single substance or a chemical compound, with a fixed composition, a substance with fixed physical and chemical properties, a special chemical symbol, and can be represented by a chemical formula.

A mixture is a substance that is made up of a mixture of two or more substances. There is no fixed chemical formula for the mixture, no fixed composition and properties, and there is no chemical reaction between the various components that make up the mixture, and the original properties will be maintained. Mixtures can be physically separated from the substances.

The solution is composed of solutes and solvents, such as normal saline is a sodium chloride solution (the solute is sodium chloride and the solvent is water), and iodine wine is an alcohol solution of iodine (the solute is iodine element, and the solvent is alcohol).

The solution must be a mixture. Air, alloys, beverages, etc., are all mixtures.

Two substances are miscible and do not form an azeotropic mixture, such as ethanol and water mixed in a certain proportion, the mixture has two boiling points and does not interfere with each other.

There are two cases in which the two substances are miscible and form an azeotropic mixture, one is called a high-boiling mixture, and the boiling point is higher than that of both components; One is a low-boiling mixture with a lower boiling point than both.

Two substances are immiscible, such as benzene and water, and according to Dalton's law of partial pressure, the boiling point of the mixture is lower than that of any of the components.

NaCl solution = NaCl (solute) + H20 (solvent) solution are all mixtures.

Because the solution includes solutes and solvents.

Follow-up questions from the questioner.

However, the concept of electrolyte is that this compound that conducts electricity in an aqueous solution or in a molten state is called an electrolyte. So does it mean in aqueous solution or not? But if the electrolyte is a compound, how do you explain it?

The aqueous solution here refers to liquid water.