The Concept of Solution Chemistry What is the definition of solution?

No, because solvents can only be liquid, gases can't be solvents, this is prescribed by scientists, and for no reason, just as scientists stipulate that 2 is greater than 1.

The solution is solvent + solute.

Gas can be used as a solute, may be dissolved in a certain liquid, forming a new substance, such as C02 + H20 = H2SO3 reversible, I have not heard of it as a solvent.

I'm a person who takes the college entrance examination and adds chemistry, so I won't take this kind of question, and I don't need to drill the horns.

I don't have a book in my hand, and I don't remember much of my previous knowledge, but I still remember that solids, liquids and gases can be used as dispersants, among which liquid dispersants are called solvents. The gas mixture you are talking about is a system in which the gas dispersion system and the solution have similar properties, and I forgot what it is called. These may not help you much, but I still hope that you will find the answers in the textbook, and some concepts may be understood after reading them a few times.

Gases can act as solvents.

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.

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-electrolyte solutions, especially for many alloy solutions.

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

The definition of a solution is: A solution that uses water as a solvent is called an aqueous solution.

A solution is made up of at least two substances.

1. A stable mixture in which the dispersed substance (solute) is dispersed in molecules or smaller particles in another substance (solvent). Water can be used as a solvent to dissolve many substances, and the solution of using water as a solvent is called an aqueous solution. Use "aq" as a symbol, e.g. "hcl(aq)".

Basic properties of aqueous solutions:

1. For solid substances, under certain temperature conditions, the mass dissolved when they can be dissolved in 100 grams of water to reach a saturated state is called solubility.

In general, the solubility changes with temperature, and when the dissolution reaches saturation, the substance is still dissolving and precipitating).

2. Aqueous solution is a homogeneous and stable mixture composed of a variety of substances.

3. The dissolution of some substances in water will reduce the freezing point of the aqueous solution.

4. Dissolving some substances in water will make the aqueous solution conductive.

The solution is a homogeneous mixture of solutes and solvents mixed together. Among them, solute refers to substances that can be completely dissolved in solvents, and the height is usually solid or gas, while solvents refer to liquids that can dissolve other substances. The higher the mass fraction of the solute in the solution, the greater the concentration of the solution.

Solution formation is a process of dissolving a substance, when the interaction force between solute molecules or ions and solvent molecules is greater than or equal to the interaction force between solute molecules or ions, solutes can be dissolved in solvents to form a solution. In this process, solute molecules or ions are surrounded by solvent molecules to form a homogeneous mixture.

A solution is a homogeneous and stable mixture formed by the dispersion of one or more substances in the form of molecules or ions in another substance. The solution can be divided into gaseous solution and solid solution according to the different aggregation forms, and their components include solutes and solvents, among which the dissolved substances are called solutes, and the substances that can dissolve other substances are called solvents. The solution can also be divided into saturated solution and unsaturated solution according to different saturation.

Because the chemical reaction carried out in the solution is usually relatively fast, in the laboratory or chemical production, to make the reaction of two solids that can react, they are often dissolved first, and then the two solutions are mixed, and they are shaken or stirred to speed up the reaction. Common solutions in life include sucrose solution, iodine wine, clarified lime water, dilute hydrochloric acid, salt water, air, etc.

1. Solution

1) The concept of solution: a homogeneous and stable mixture formed by the dispersion of one or several substances into another substance is called a solution.

2) The basic characteristics of the solution: a mixture of uniformity and stability.

Note: a. The solution is not necessarily colorless, such as CuSO4 is blue, FeSO4 is light green, Fe2(SO4)3 is yellow.

b. The solute can be solid, liquid or gaseous; Water is the most commonly used solvent.

c. Mass of solution = mass of solute + mass of solvent.

The volume of the solution ≠ the volume of the solute + the volume of the solvent.

d. Name of the solution: solvent solution of solute (e.g., iodine wine - alcohol solution of iodine).

Solids and gases are soluble in liquids, and liquids are solvents.

2. Judgment of solute and solvent There is water, and water is the solvent

Liquids are soluble in liquids3. Saturated solution and unsaturated solution are anhydrous, and the amount is solvent

1) Concept: 2) Judgment method: see if there is insoluble matter or continue to add the solute to see if it can be dissolved.

3) Conversion between saturated and unsaturated solutions.

Note: With the exception of Ca(OH)2 and gases, its solubility decreases with increasing temperature.

The most reliable method is to add solute and evaporate the solvent.

4) The relationship between concentrated and dilute solutions and saturated unsaturated solutions.

A saturated solution is not necessarily a concentrated solution.

An unsaturated solution is not necessarily a dilute solution, such as a saturated aqueous lime solution is a dilute solution.

At a certain temperature, the saturated solution of the same solute must be denser than its unsaturated solution.

5) Exothermic and endothermic phenomena during dissolution.

Dissolution endothermy: such as NH4NO3 dissolution.

Dissolution and exothermy: such as NaOH dissolution, concentrated H2SO4 dissolution.

Dissolves without obvious thermal phenomena: such as NaCl