Copper sulfate color, what color is the copper sulfate solution

Copper sulfate itself is white, and it turns blue when it encounters water, which is why you can use dry copper sulfate to check whether the product has water.

Copper sulfate is a white powder, and when it encounters water, it forms a blue copper sulfate solution, which can generally be used to test whether there is miserable water in the gasoline.

The copper sulphate solution and crystals are blue, and the anhydrous copper sulphate without crystalline water is a white solid.

Anhydrous copper sulphate is a white or off-white powder.

Anhydrous copper sulfate has strong water absorption, and the solid of anhydrous copper sulfate turns from white to blue when exposed to water.

Chemical equation: CuSO4+5H2O==CuSO4·5H2O

Generally speaking, copper sulfate refers to anhydrous copper sulfate, which is a white powder. Copper sulfate pentahydrate is blue, commonly known as blue alum or bile alum. The aqueous solution is blue or light blue, due to the difference in concentration.

Anhydrous copper sulphate: CuSO4 white powder.

Copper sulfate pentahydrate: Blue crystal.

Anhydrous is white, and crystalline water is blue.

The solution is blue, and the purity is a white powder.

Copper sulfate will form lake blue after dissolving in water, very beautiful, the reason for the formation of such a color, is mainly due to the metal root ion, the sodium ion itself has no color, but the divalent copper ion will be blue, whether it is copper sulfate or copper hydroxide, it is blue, copper sulfate has an important role in many fields, such as often used as an analytical reagent, often used as an emetic agent in the medical field.

What color is the copper sulphate solution.

Copper sulfate is divided into pentahydrate and copper sulfate with crystal water, as well as anhydrous copper sulfate with crystal water, the former is a blue crystal, the latter is a white powder, and the two can be converted into each other, the condition is heating. The aqueous solution of copper sulfate formed after dissolving copper sulfate is lake blue and beautiful. See the solution.

The color is all because of the metal root ions in it, and the sodium ions are colorless. The bivalent copper ions are blue, so whether it is copper sulfate or copper hydroxide, they are all blue. Copper sulphate is an important raw material for the preparation of other copper-containing compounds.

Bordeaux liquid can be obtained by mixing with lime milk, which is used as a fungicide. It is also used as an electrolyte for electrolytic refining of copper.

What color is the copper sulphate solution.

Copper sulphate uses.

used as an analytical reagent, such as Filin reagent for the identification of reducing sugars and diurea reagent for the identification of proteins in biology, but it is usually prepared and used; used as food-grade chelating agent and fining agent, used in preserved egg and wine production process; Industrial sector. used in the manufacture of other copper salts such as cuprous chloride, copper chloride, copper pyrophosphate, cuprous oxide, copper acetate, copper carbonate, copper monoazo dyes such as reactive brilliant blue, reactive violet, etc.; The coating industry is used to produce antifouling paint for ship bottoms; In the electroplating industry, it is used as the main salt of all-bright acid copper plating and copper ion additives; The printing and dyeing industry is used as an oxidizer for mordant and fine dyed cloth; It is used in the organic industry as a catalyst for the synthesis of fragrance and dye intermediates, and as a polymerization inhibitor for methyl methacrylate. Anhydrous salts are used to catalyze transacetal reactions.

Anhydrous salts react with potassium permanganate to form an oxidizing agent for the conversion of primary alcohols.

In the agricultural field, Bordeaux liquid is formed after mixing with lime water, which is used as a fungicide to control fungi on crops and prevent fruit rotting; Since copper ions are toxic to fish, the dosage must be strictly controlled. Aquaculture is also used as the main raw material for feed additives trace element copper; Dehydrating agent for alcohols and organic compounds. Gas desiccant.

For chemistry education, copper sulfate is often included in children's chemistry laboratory reagents for crystal formation tests and copper plating experiments. Because of its toxicity, it is not recommended for young children. Copper sulphate can also be used to demonstrate the process of crystalline water loss weathering and obtaining crystallized water.

In the junior high school laboratory examination, the law of conservation of mass was verified by the displacement reaction between copper sulfate and iron. Sulfuric acid can also be prepared. It is used as an emetic in the medical field.

How do these people listen to the class, to be precise, blue-green, when the concentration is high, it tends to be green, and when the concentration is low, it tends to be blue.

To add up, most of what we see is a low concentration of copper sulphate solution, so it's not surprising that these people, including their teachers, say it's blue.

The same ion will have different colors in different situations.

The copper in copper sulfate pentahydrate exists in the form [Cu(H2O)4]2+ and is blue. The same [Cu(H2O)4]2+ is also present in dilute solutions of all other divalent copper salts, all of which appear the same blue color. If ammonia is added to it, it will appear darker blue due to the formation of [Cu(NH3)4]2+.

Regarding the flame color reaction, its special color is due to the transition of electrons outside the nucleus (the electrons are excited to a higher energy level by high temperatures, and emit light when they fall back, which is the emission spectrum), and its color is mainly produced by ions absorbing light of a certain wavelength.

In solids, the color is more complex and is associated with anions. For example, anhydrous CuCl2 is yellow, CUBR2 and CUS are black, these are related to the polarization between ions (the anhydrous CuSO4 formed by the combination of sulfate and copper ions that are not easy to polarize is colorless, and a small amount of blue copper sulfate can be heated to try).In the same way, colorless cuprous ions can be formed into red Cu2O, yellow CuOh, and black Cu2S, but due to their weak polarization ability, they are more colorless compounds, such as CuCl, CuR, and Cu2

The color of metallic copper is mainly caused by the free electrons in its slip, and there are also reasons for the interaction of metal cations.

1. Anhydrous copper sulfate color: white or off-white powder. Its aqueous solution is weakly acidic and blue.

2. Color of copper sulfate pentahydrate: When copper sulfate crystallizes from aqueous solution, bright blue copper sulfate pentahydrate (CuSO4·5H2O, also known as bile alum) is generated, and this principle can be used to test the existence of water. It decomposes after losing crystal water after being heated, and is very stable at room temperature and pressure, without deliquescent, and will gradually weathered in dry air.

3. It is a protective inorganic fungicide, which is relatively safe for humans and animals. Copper sulphate is an important raw material for the preparation of other copper-containing compounds. Bordeaux liquid can be obtained by mixing with lime milk, which is used as a fungicide.

It is also used as an electrolyte for electrolytic refining of copper. Copper tetraaminohydrate can be used as a bathroom disinfectant.

1. Sodium peroxide: it is originally light yellow, but it is white when exposed to water.

2. Huling anhydrous copper sulfate: originally a white trouser book, blue when exposed to water.

3. Anhydrous cobalt chloride: originally dark blue, pink when exposed to water.

Copper sulfate is a white or off-white powder, and its aqueous solution is weakly acidic and blue. However, when crystallized from an aqueous solution, a blue copper sulfate pentahydrate (alum) is formed, a principle that can be used to test the presence of water.

Copper sulfide is an inorganic compound, black-brown, extremely insoluble, one of the most insoluble leakage qualities, second only to silver sulfide, mercury sulfide, palladium sulfide and aleplatin sulfide.

Copper sulfide is an inorganic compound, the chemical formula is Cus or CUI2CUII(S2)S, so in fact, two-thirds of the sulfur is persulfide ions, two-thirds of the copper is cuprous ions, black-brown, extremely insoluble, one of the most insoluble substances (second only to silver sulfide, mercury sulfide, palladium sulfide and aplatin sulfide, etc.), because its insolubility makes some seemingly impossible reactions can occur.

It is unstable to heat, and decomposes into cuprous sulfide and sulfur when heated to 220

2cus==220℃==cu2s+s

It is reducible, easy to be oxidized and dissolved by concentrated and dilute nitric acid and concentrated sulfuric acid

CUS+8HNO3 (concentrated)==CUSO4+8NO2 +4H2O3CUS+8HNO3 (dilute)==3CUSO4+8NO +4H2OCUS+4H2SO4 (concentrated)==CUSO4+4SO2 +4H2O can also be slowly oxidized by oxygen in air:

2cus+o2===2cuo+2s

It can be quickly oxidized by oxygen when heated

2cus+3o2==△2cuo+2so2