Put the iron wire into the copper sulfate solution, and the mass of the solution increases after the

No, the conservation of mass is only equal to the total mass before the reaction and the total mass after the reaction, and does not mean that the mass of the solute before and after the reaction is equal, because the valency of the elements is different, so the mass of the solute before and after the reaction is not necessarily equal.

fe+cuso4=feso4+cu

In the beginning, the wire was insoluble in water and was not part of the solution.

Solution mass = solute mass + solvent mass.

Before the reaction, the solute is CuSO4

After the reaction is a portion of CuSO4 FeSO4 (1 part CuSO4 is converted to 1 part FeSO4).

The relative atomic mass of Cu is 64 Fe is 56 so the relative molecular mass of CuSO4 is greater than that of FeSO4

Therefore, the iron wire is put into the copper sulfate solution, and the mass of the solution decreases instead of increasing after the reaction.

If you don't know something, please ask your family.

Not increasing, this is a displacement reaction, the relative mass of the paste is greater than copper, and the copper is replaced by iron, following the law of conservation of mass.

The copper is replaced and adheres to the wire, which dissolves and actually reduces the mass of the solution, in accordance with the law of conservation of mass.

After the reaction, there is a red solid on the surface of the iron wire, and the relative molecular weight of copper sulfate and ferrous sulfate is compared, and the mass of the solution after the reaction is known whether it increases, but it will never change.

Reaction of iron + copper sulphate = ferrous sulphate + copper, and the question is only about the quality of the solution. Fe+CuSo4=Feso4+Cu, the relative atomic mass of iron is 56, and the relative atomic mass of precipitated copper is 64, and the mass of the solution should be reduced.

Summary. Hello, put the iron wire into a mixed solution of dilute copper sulfate and dilute sulfuric acid, the quality of the iron wire remains the same, no, because iron is the most reactive.

Copper ions are inactive in comparison, so the iron wire will undergo a displacement reaction when it is placed in dilute sulfuric acid containing copper.

Put the iron wire into a mixed solution of dilute copper sulfate and dilute sulfuric acid, and the quality of the iron wire remains unchanged.

Hello, put the iron ruler into the mixed solution of dilute copper sulfate and dilute sulfuric acid, the quality of the iron wire remains the same, no, because iron is the most active and copper ions are inactive compared to copper ions, so the iron wire will be replaced in the dilute sulfuric acid containing copper. Chang Nian.

Metal activity sequence: k ca na mg al zn fe sn pb (h) cu hg ag pt au

According to the order of metal activity, the oxidation of copper ions is stronger than that of hydrogen ions, because copper is empty behind hydrogen. Therefore, iron will first react with copper sulfate until the copper sulfate is completely reactive, and then react with dilute sulfuric acid.

The phenomenon is that the surface of the silvery-white solid produces a red solid, and the solution changes from blue to light green.

This phenomenon is caused by a chemical reaction between the iron wire and the copper sulphate dissolver in the residual lead solution. The best electron in the iron wire is attracted by the copper ions in the copper sulfate, and the iron atoms are oxidized to iron ions, and the copper ions are reduced to copper atoms. During the reaction, the mass of the iron wire gradually decreases, and the color of the copper sulfate gradually changes.

The reaction phenomenon is that the surface of the silvery-white solid produces a red solid, and the solution changes from blue to light green.

In education and experimental research, we usually use these reaction phenomena to help students better understand and master the basic principles and laws of chemical reactions, and also provide theoretical basis and technical support for practical applications.

Iron is a chemical element, a crystal, its chemical symbol is Fe, the atomic number is 26, in the periodic table of chemical elements in the 4th period, group VIII, is the representative of the iron group elements. is the most commonly used metal. It is a type of transition metal and is the second most abundant metallic element in the earth's crust.

Iron objects were found in ancient Egypt in 3500 BC. They contain nickel, indicating that they are from meteors. The Hittites of ancient Asia Minor (present-day Turkey) were the first to smelt iron from iron ore 3,500 years ago (before 1,500 BC), and this new, hard metal gave them economic and political power, and the Iron Age began.

China was also one of the first countries to discover and master ironmaking technology. In 1973, a Shang Dynasty iron blade bronze was unearthed in Hebei Province, China, indicating that more than 3,300 years ago, Chinese knew iron, were familiar with the forging properties of iron, identified the difference between iron and bronze in nature, and cast iron on the blade of copper weapons to strengthen the toughness of copper. Scientific appraisal has proved that the iron blade was forged from meteoric iron.

With the maturity of bronze smelting technology, conditions were gradually created for the development of iron smelting technology. In addition, iron is also found in the human body. Hemoglobin is a component that helps in oxygen transport.

First, a layer of red copper is attached to the surface of the iron sheet, and the solution changes from blue to light green.

This is because iron is more reactive than copper, so iron will replace the copper in the copper sulfate.

fe+cuso4=cu+feso4

If it continues to be placed, because ferrous sulfate is unstable, it will be oxidized to iron sulfate by oxygen in the air, and iron hydroxide precipitates will be formed at the same time.

12feso4+3o2+6h2o==4fe2(so4)3+4fe(oh)3

Iron sheets are inserted into the copper sulfate solution, and the copper elements can be displaced from the solution because the order of activity of iron is stronger than that of copper.

The reaction equation is: Fe+CuSo4==FeSo4+Cu

Reaction phenomenon: The iron sheet gradually dissolves, precipitates a red solid, and the solution slowly changes from blue to light green.

When the iron wire reacts with the copper sulfate solution, a red substance will be attached to the surface of the iron wire, which is the copper that is replaced by iron. The solution changes from blue to light green!

The reaction equation is: Fe+CuSO4===Cu+FeSO4

After the reaction of iron and copper sulfate, the mass and density of the solution – (becomes smaller) The mass of the solution before the reaction is copper sulfate solution, and after the reaction is ferrous sulfate solution.

The mass of a copper atom is greater than that of an iron atom.

Therefore, the mass of the reaction solution decreases, the mass becomes smaller, so the density decreases.

If I want to measure the density of a copper sulphate solution, I have two methods.

Method 1: Add an excess of calcium chloride solution to fully react the sulfate ions in the solution to generate calcium sulfate precipitate, and then calculate the density of the original copper sulfate solution by measuring the mass of the precipitate.

Method 2: Through the process of distillation, dissolution and re-distillation, the copper sulfate in the solution is crystallized into copper sulfate pentahydrate crystals, and the density of the original copper sulfate solution is calculated by measuring the crystal quality.

After the reaction of iron and copper thiolate, the mass and density of the solution - (decreased) The mass of the solution trace source before the reaction is the copper sulfate solution.

After the reaction is ferrous sulfate.

Solution. The mass of a copper atom is greater than the mass of an iron atom.

Therefore, the mass of the reaction solution decreases, the mass becomes smaller, so the density decreases.

fe+cuso4=feso4+cu

For every 56 parts of iron that react with copper sulfate, 64 parts of copper precipitate, and when it adheres to the surface of the iron, the mass of the iron wire increases by 8 parts. Therefore, the quality of the iron wire will increase after the reaction between the iron wire and copper sulfate.

Because the iron wire and copper sulfate react, copper will precipitate, and it will almost become copper wire after a long time. The atomic weight of copper is a bit larger, so the mass increases.

The displaced copper is adsorbed on the iron wire, and the relative molecular mass of Cu is larger than that of iron, so the iron wire will gain weight.

Because the resulting copper adheres to the surface of the iron, the mass of the iron increases.

fe+cuso4====cu+feso4

1.Iron precipitates copper, and there is poor quality.

2. Bring out the solution on the iron sheet (haha, learning things to be bitter and happy...)

This question is the easiest to do with the difference. The resulting copper adheres to the surface of the iron, increasing the mass of the iron sheet.

Fe+CuSO4=Feso4+Cu iron sheet weight gain (mass reduction of solution).

If 56 grams of iron is dissolved, 64 grams of copper will be precipitated, so the mass is reduced.

Iron 56 copper 64 iron displaces copper solute mass loss during reaction.