What substances are halogens dissolved in and what are the substances in halides?

Easily melted into organic reagents, such as benzene Ccl4 alcohol. Slightly contained in water.

1. Fluorine (f): Fluorine gas is a light yellow gas at room temperature and is highly toxic. The single halogen is white and transparent and colorless in aqueous solution. Fluorine, hydrogen fluoride (hydrofluoric acid) potato tease have strong corrosiveness to glass.

2. Chlorine (Cl): Chlorine is yellow-green gas at room temperature. Aqueous solution (solubility 20 data):

Chlorinated water is yellow-green in color. The solution with carbon tetrachloride is yellow-green, yellow-green in benzene solution, AGCL is white, and it is insoluble in water. The copper chloride solution is blue (the complex formation is dark green), the ferric chloride solution is yellow, and the ferrous chloride solution is light green.

3. Bromine (br): liquid bromine, which is a dark reddish-brown liquid at room temperature. In aqueous solution:

Bromine water is orange, and the solubility may appear in the following colors due to different concentrations: yellow, brownish-red (reddish-brown). The CCL4 solution is orange-red, the benzene solution is orange-red, and the alcohol solution is orange-red.

Barium bromide solution: colorless, copper bromide solid: black crystalline or crystalline powder, magnesium bromide solution:

Colourless. 4. Iodine (I): Iodine is a purple-black solid at room temperature. Aqueous solution (solubility 20 data):

Iodized water: brownish-yellow, solubility due to different concentrations, the following colors may appear in the question: brownish-yellow, purple (red), brown).

In carbon tetrachloride solution purple, benzene solution purple, alcohol solution brown.

Halide. in the presence of halogens.

Among the binary compounds, the compounds with negative oxidation numbers of halogens are called halides. These include fluoride, chloride, bromide, iodide, and some halogen intermods.

According to their composition, the properties of halide elements are divided into metal halides and non-metal halides.

According to the bond type of the halides, they can be divided into ionic halides and covalent buried dust halides. Boron, carbon bending, silicon, nitrogen, hydrogen, sulfur, phosphorus and other non-metallic halides are all covalent, most of the covalent types are volatile, low melting and boiling points, and the interaction with water exists in the following three situations.

1) Some are soluble in water, such as hydrogen halide and ammonium chloride.

Wait. 2) Some hydrolysis occurs with the reaction of water, such as silicon tetrachloride.

Phosphorus trichloride, phosphorus pentachloride, etc.

3) A few are insoluble in water, such as carbon tetrachloride.

sulfur hexafluoride and so on. Most of the alkali metal and alkaline earth metal halides in metal halides are ionic. It is characterized by high melting and boiling points and is easily soluble in water. Some of the other metal halides are ionic and some are covalent.

There is no obvious regularity, e.g. ferric dichloride is ionic, ferric chloride.

It is covalent, and there is no absolute boundary between the two. Halogen intermodals (e.g., chlorochloride trifluoride ClF3) and composite halides (e.g., carnallite KCL·mgCl2·6H2O) also belong to the category of halides in a broad sense.

Summary. Dear, which solvents have more halogens: propylene glycol, dimethyl carbonate, butyl acetate.

Dear, which solvents have more halogens: propylene glycol, dimethyl carbonate, butyl acetate.

Halogen elements refer to periodic A group elements, referred to as halogens. They are typical salts in nature, and they are halogenous elements. With the increase of molecular weight, the dispersion force between halogen molecules gradually increases, the color becomes darker, and their melting point, boiling point, density, and atomic volume also increase in turn.

Halogens are oxidizing, and fluorine elements are the most oxidizing. Halogen cryptogens and metal elements constitute a large number of inorganic salts, and in addition, they also play an important role in organic synthesis and other fields.

Since halogens can form salts with many metals, in Chinese, halogen means saline-alkali land.

Fluorine gas is a pale yellow gas at room temperature and is highly toxic. React with water to immediately generate hydrofluoric acid and oxygen and combustion, and at the same time can rupture the container, and there is a danger when the amount is large. Fluorine and hydrogen fluoride (hydrofluoric acid) are highly corrosive to glass.

Fluorine is the most non-metallic element (and does not have a d orbital) and can only be -1 valent. The reaction between elemental fluorine and salt solution is first reacted with water, and the hydrofluoric acid produced is then reacted with salt; Penetration into the base may result. Aqueous hydrofluoric acid is a moderately strong acid.

However, it is the most stable hydrohalic acid, because the fluoroband atom contains a large electron affinity. If you accidentally stick to it, it will corrode all the way to the bone marrow. The chemical properties are active, and it can react with almost all elements (except helium, neon, etc., it is an inert gas).

Will there be halogens in EVA and fabric?

does not contain, EVA scientific name ethylene vinyl acetate copolymer, halogen-free".

What about in the fabric? Will there be halogens?

Fabrics contain halogens.

Why are halogens found in fabrics? How do halogens are produced?

Because some fabrics are made of plastic, the plastic composition is very complex and contains halogens.

Physical properties of halogen element: Physical properties f2 cl2 br2 i2 color. Status: Light yellow-green gas, Yellow-green gas, Reddish-brown liquid, volatile, purple-black, solid, easy to sublimate, Density -- Increasing --- melting and boiling point -- Increasing solubility --- water (F2 strong reaction) -- Decreasing solubility --- organic solvents -- Increasing --- halogen elements and their colors in different solvents Room temperature Water C6H6 Ccl4 Gasoline F2 Light yellow-green Strong reaction C12 Yellow-green Light yellow-green Yellow-green Yellow-green Yellow-green Br2 Dark reddish-brown Yellow Orange Orange Orange Red Orange Orange Red Purple-black, dark yellow, brown, light purple, purple, purple, purple-red.

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The sublimation of most substances is only an increase in the distance between molecules, which is a physical change. However, when learning, we must not be partial to the whole, because some substances have undergone chemical changes when they are sublimated, such as red phosphorus, which will sublimate when heated to 416 in isolation from air, and directly become P4 molecules, and the vapor condensation of these P4 molecules will obtain white phosphorus. Red phosphorus and white phosphorus are allotropic forms of each other, and it is generally accepted that the transformation between allomorphs is a chemical change, so when red phosphorus is sublimated, there is a chemical change (a molecule that becomes white phosphorus), rather than a physical change.

In the same way, some substances may not only change physically in the process of changing from liquid to gaseous, for example, the molecular structure of sulfur element in the process of "solid-liquid-vapor" changes, the solid sulfur is mostly the s8 molecule of the ring structure, the sulfur can be melted at 112, the liquid sulfur at the initial melting is very fluid, but with the increase of temperature, the liquid sulfur becomes viscous, this is because the ring-shaped s8 molecular ring is opened, and they are connected to each other to form a long chain molecule. As the intermolecular forces increase, sulfur can be vaporized into reddish-brown sulfur vapor as the temperature continues to rise, and the sulfur vapor contains molecules such as S2 and S4, so the three-state change of sulfur is not a simple physical change, but a very complex chemical process.

Halogen elements include fluorine, chlorine, bromine, iodine, etc., which are the most typical non-metallic elements and are widely used.

1. Hydrogen fluoride can also be used to prepare sodium fluoride and other fluorides, fluoride liquid-based sodium is a pesticide used to kill underground pests, and sodium fluorophosphate also has the effect of preventing the occurrence of dental caries. In addition, hydrogen fluoride is also used in the manufacture of plastics, rubber, pharmaceuticals, etc., for the preparation of elemental fluorine. Fluorine is used to refine uranium.

2. Industrially, hydrogen is used to burn in chlorine gas to prepare hydrochloric acid, and phosphorus trichloride, the product of chlorine and phosphorus reaction, can be used to make many phosphorus compounds, such as trichlorfon and other pesticides. Tap water disinfection is the use of chlorine gas to react with water, and the hypochlorous acid produced has strong oxidizing properties, which can sterilize, disinfect and bleach. Bleaching powder, disinfectant, used in life, that is.

Non-metallic properties of elements.

It gradually weakens from the order of fluorine, chlorine, bromine and iodine. Ability to acquire electrons: The increasing number of F>Cl>Br>I electron layers, the weaker the gravitational pull of the nucleus on the outer electrons.

Halogens can react with metals to form halides.

The stronger the non-metallic properties, the easier the reaction is to proceed and the more stable the halides generated.

Halogens can react with hydrogen to form hydrogen halide.

F2: At low temperature, the dark place reacts violently, and even the torch is blown up, and HF is stable. The slow reaction of Cl2 at low temperature needs to be carried out under light or heating conditions. br2

I2 can only react at high temperature, and Hi is unstable.

Halogens react with water.

Oxidation reactions. Displacement of oxygen in the water.

Hydrolysis reaction. The halogen undergoes a disproportionation reaction.

Comparison of the activity of each element of halogen.

The order of activity of each element of halogen: F2 Cl2 BR2 I25) Iodine and starch reaction: iodine + starch blue, check for the presence of i2 or starch.