Copper and copper compound color, what color is copper?

Generally, the formation of insoluble copper salts is copper ions.

with the corresponding anion.

Reaction formed, dissolved into two or more ions; In addition, there are also elemental copper that directly reacts with the substance, which is difficult to judge; cuso4?.Actually, it's not the color of these solids that dissolve in water or other solutions: flame color.

Green; cubr2

brown, which causes the transition of electrons; [cu(nh3)4]2+

Blue; There is also the formation of complexes in solution.

and the formation (if necessary, to control the amount of related substances added), and show the complementary colors of the wavelength of light) elemental; cu2o

Dark; cuo

Black; 5h2o

Blue; cucl

white, e.g. Cu2S; [cu(en)2]2+

Navy violet: cu

purplish red or dark red copper compounds; cuf

Red; cubr yellow, because there is a solubility of the substance after dissolution.

Larger; cu(bo2)2

Blue; cucn

white, each liging ion has different refractive and absorbance, such as cuf; [cu(oh)4]2-

Blue violet. 2. Form a mating example, those ions are individually with water molecules.

or solvent molecule binding, CuCl2; cu(cn)2

brownish-yellow; cus black, e.g. [cu(oh)4]2-; cu(oh)2?；cuso4

Colourless; cu(oh)2

light blue, so the color is related to the ion concentration; [cu(h2o)4]2+

Blue; [cucl4]2-

Yellow; cuco3

Dark green, the essence of color development is that the substance absorbs a certain wavelength of light in white light, cucl, cuso41The colors of the copper-based compounds are as follows (Note; cuf2

White; cu2[fe(cn)6]

Brown-red: I mean solid; cui

brownish-yellow; cucl2

brownish-yellow (yellow-green solution); cu2s

Black; Alkyne copper. Red;

The pure substance of cu is purplish red.

Copper oxide, copper sulfide, black.

Copper sulfate pentahydrate, freshly made copper hydroxide, blue.

Copper chloride, green.

Cuprous oxide, brick red.

Dried copper sulphate, colorless.

It is worth noting that the aqueous solution of copper chloride varies in color with different concentrations. From thick to thin, from green to blue.

The aqueous solution of the copper salt is blue.

The aqueous solution of ferric ions is light green.

The aqueous solution of ferric ions is brownish-yellow.

These colors have a lot to do with valency, but when it comes to complexes, it's more complicated.

Solids are much more complex.

For example, ferric tetroxide is a black crystalline substance, and copper sulfide is also black.

1. Copper (fuchsia).

Copper is a transition element, the chemical symbol Cu, English copper, atomic number 29. Pure copper is a soft metal, the surface is reddish-orange with metallic luster when it is first cut, and the elemental color is purple-red.

Good ductility, high thermal and electrical conductivity, so it is the most commonly used material in cables and electrical and electronic components, and can also be used as a building material, which can form many alloys. Copper alloys have excellent mechanical properties and very low resistivity, the most important of which are bronze and brass. In addition, copper is also a durable metal that can be used many times without compromising its mechanical properties.

2. Iron (silvery-white).

Iron is a metallic element with atomic number 26 and an elemental chemical formula for iron: Fe. Pure iron is white or silvery-white with a metallic luster.

Melting point 1538, boiling point 2750, soluble in strong acid and medium strong acid, insoluble in water. Iron has 0 valence, +2 valence, +3 valence and +6 valence, of which +2 and +3 valence are more common, and +6 valence is rare.

3. Ferrous hydroxide (white but mostly dark green).

Ferrous hydroxide [Fe(OH)2] is a white solid at room temperature and pressure, but it is easily oxidized to Fe(OH)3, so it is mostly dark green.

Ferrous hydroxide, chemical formula Fe(OH)2, relative molecular weight. White solid, insoluble in water. Density.

It is easy to decompose when heated. It is a medium-strong alkali, soluble in acid, insoluble in alkali. Prone to oxidation.

It can be prepared by reacting a strong alkali solution with an iron salt solution.

4. Copper hydroxide.

Copper hydroxide (copper hydroxide), molecular formula Cu(OH)2, dry powder is blue or crystalline, slightly toxic, used as an analytical reagent, also used in medicine, pesticides, etc. It can be used as catalyst, mordant, pigment, feed additive, paper dyes, swimming pool disinfectant, etc. At the same time, it is also a weak oxidizing agent.

5. Ferrous oxide.

Ferrous oxide, chemical formula FeO. It is one of the oxides of iron. It has a black powder in appearance, covalently bound to oxygen by iron in an oxidation state of +2 valence. Its mineral form is galena.

Ferrous oxide is often confused with rust, but the main component of rust is hydrated iron oxide. Ferrous oxide is a non-integer compound in which the ratio of iron to oxygen varies from to.

Copper oxide. 1) Black solid, insoluble in water

2) It belongs to alkaline oxidation and fibrous cherry tree.

Can react with acids (such as hydrochloric acid):

cuo＋2hcl ==cucl2＋h2o.

3) It can be restored by H2, C, etc.:

h2＋cuo cu＋h2o

Cuprous oxide 1) Physical properties: red powder, insoluble in water 2) Chemical properties.

It can undergo the disproportionation reaction of copper under acidic conditions.

cu2o＋h2so4 ==cuso4＋cu＋h2o.

Can be restored by H2, C, etc.:

cu2o＋h2 2cu＋h2o.

Copper hydroxide 1) Blue solid, insoluble in water

2) Copper hydroxide is a binary weak base, which can react with acids (such as hydrochloric acid), and the chemical equation is: Cu(OH)2 2HCl ==CuCl2 2H2O

3) Copper hydroxide is unstable, and it is easy to decompose lead when heated, and the chemical equation is:

cu(oh)2 cuo＋h2o.

4) Copper hydroxide has weak oxidation, and the newly prepared Cu(OH)2 suspension can react with organic matter containing aldehyde groups

Copper sulphate. 1) CuSO4·5H2O is a blue crystal, commonly known as blue alum.

2) Anhydrous CuSO4 turns blue when exposed to water (generating CuSO4·5H2O), which can be used as a water test.

Test basis 3) The mixture of CuSO4 and lime emulsion is the inorganic pesticide Bordeaux liquid.

It is a good fungicide for celery bushes, which can be used to control diseases of a variety of crops

The color of copper is purple, yellow, cyan, and white. The details are as follows:

1. Copper. It refers to pure copper, also known as red copper, because its color is purple-red. Copper is generally called copper because of its rose-red color and purple color after the formation of an oxide film on the surface. Copper is copper that contains a certain amount of oxygen, so it is also known as oxygenated copper.

2. Brass. Brass is an alloy composed of copper and zinc, brass composed of copper and zinc is called ordinary brass, and if it is a variety of alloys composed of more than two elements, it is called special brass.

3. Bronze. Bronze is the earliest alloy in the history of metal smelting and casting, and the addition of tin or lead to pure copper is of special importance and historical significance.

4. Cupronickel. Cupronickel is a copper-based alloy with nickel as the main added element, which is silvery-white and has a metallic luster, hence the name cupronickel.

Common Uses of Copper:

1. Electrical and electronic market.

The electrical and electronic market accounts for about 28% of the total. In 1997, these two markets became the second largest end-users of copper consumption, with a 25% market share. With the rapid development of science and technology in the field of electronics, some obsolete copper-containing products are becoming more and more obsolete.

2. Transportation equipment.

Transportation equipment is the third largest market for copper, accounting for about 13% of the total. Automotive copper and copper alloys are mainly used in radiators, brake system pipelines, hydraulic devices, gears, bearings, brake friction pads, power distribution and power systems, gaskets, and various joints, accessories and trims.

3. Industrial machinery and equipment.

Industrial machinery and equipment is another major application market, where copper tends to have a relatively long service life. Copper components can be found in almost all machines.

4. Medical State Mingtong.

In medicine, the bactericidal effect of copper has been recognized for a long time. Since the 50s of the 20th century, copper has also been found to have very good medicinal uses. Later, Mexican scientists also discovered that copper has anti-cancer properties.

In the new century, British researchers also discovered that copper has a strong bactericidal effect.

Different kinds of copper have different colors. Bronze (an alloy of copper and tin) is blue-gray in color; Pure copper is purplish-red; Brass (copper-zinc alloy) is golden yellow; Zhiyan white copper (a trigram copper-based alloy with nickel as the main added element) is white. A layer of green basic copper carbonate can be formed on the surface of copper in moist air, and red speckled patina can be formed on the surface of some ancient cultural relics.

Copper oxide is a black solid; Anhydrous copper sulphate is a white powder; Copper sulphate is sky blue or slightly yellow granular crystals.