Why is the iron fished out of the river black?

The iron fished out of the river is black because of the oxidation of the water and the nutrient change of the air.

The surface of the rise was soaked in water, oxidized, and turned into iron oxide. The color of iron oxide is black.

The iron fished out of the river water has been oxidized and corroded because it has been soaked in water for a long time, so a black rust has been produced on it, so it is black.

Because it is a very fine iron powder, the light undergoes complex reflection and refraction on its surface, and because it is too fine, it will eventually absorb most of the light and appear black. In fact, any powder in the nanometer range, whether metallic or non-metallic, appears black. The silvery-white color of the iron sheet is related to the outermost electron configuration of its atoms, and the color can only be revealed in a relatively large range of atoms.

Hope it helps.

The iron that comes out of the river is black, and that's because it's settled in the river and it's rusted, so it's black, and then there's some mud and stuff on it, so it's black.

Incomplete oxidation, iron in water to form ferric oxide, that is, a mixture of ferrous oxide FeO and Fe2O3, is black.

If you put iron in the river, it will definitely corrode, and if it is corroded, it will cause the iron to rust, so it is normal for your hands to have black rust on your hands.

Well, the iron that was fished out of the river was black because it produced a trivalent iron, which is what we usually call rust, so it is black.

Iron rusts in water, and black rust is sticky, slippery to the touch, containing iron oxide, ferric tetroxide, and iron oxide.

This friend, because there is oxygen in the water, after a long period of oxygen oxidation, even this iron will have a corrosive effect if it does not rust.

Therefore, the iron that has been soaked in water for a long time has been corroded by water and turned black.

Because when the iron is soaked in the river, it can produce some chemical reactions on its own, so it will turn into some gray color.

Your physical strength should be rusty, and if you rust, it will turn black, and the rust will be in there.

Because it is rusted, oxidized, and there is a chemical reaction, it is black, which is a very common sense problem, and the iron has oxidized.

There should be some erosion of the iron on his surface, so there will be some blackness, which is normal, and then clean it up.

This is because the iron rusts.

At the same time, it binds to microorganisms and contaminants in the soil.

It's this black thing.

This is due to the fact that rust has already formed, mainly because the surface of the iron sheet oxidizes after it encounters water again.

Iron has been in the river for a long time, so if the iron has been in the river for a long time, it will generally turn black and oxidize.

The blackening of the iron fished out of the water is the result of oxidation.

Because iron is black after oxidation. If it is left for a long time, it will oxidize if it comes into contact with air.

Iron will absorb things in the river water, and the iron itself will rust in the water environment.

The iron-blooded black one that was fished out of the Haihe River water may have been in it for too long, and there were some of that in the river water. Things will corrode.

Now the river water is fished out and pasted, I think it's black, this is also very normal, and it's also because of the soaking.

Why is your rat's iron black? If it is pasted with Teacher Xuelian, if it is black, it is possible that he oxidized and had a chemical reaction, which made the car black.

It may be the cause of rust.

Because the iron is blackened by soaking in water.

It's that there are some changes to other substances attached to its surface.

The black layer on top must be rust. Inside the box, it is also rusty iron.

Iron and water undergo a chemical reaction.

The chemical equation for rust should be ferric tetroxide.

The main reason is electrochemical corrosion, there are more electrolytes in seawater, steel contains iron and carbon, which constitute galvanic cells, iron is the negative electrode, loses electrons, is oxidized, that is, corroded.

How steel is made, in this pearl, occasionally in the cold water, I don't know this and that.

Because there are various salts in seawater (mostly sodium ions and magnesium ions), and steel is also mostly alloys, steel is more likely to produce the galvanic cell effect in seawater. Metallic elements that have lost electrons are more reactive and susceptible to corrosion.

The salt content in seawater is large, and the corrosion of iron is more serious.

Father Vasily never asked the children about their homework, so Paul went to the priest's house with a few of his classmates who had failed their homework. While waiting in the kitchen, he sprinkled (a pinch of cigarette) on the priest's dough and was kicked out of school. He was only (12) years old.

2. Paul was taken by his mother to work in the (canteen) at the station, and he was very hard to do and was often beaten for no reason.

3. The elder brother Artyom was not able to take Paul away after a year because he was in a (shunting yard) that did not accept child labor.

4. In the station cafeteria, only the 18-year-old kind female worker (Floxia) can still give Paul some warmth, but she herself was betrayed by her cousin Prohol and deducted the money she was forced to sell.

5. The only partner is a red-haired one who is a little older than Paul (Klimka).

6. One morning in the first lunar month, Paul turned on (the faucet) because he was too sleepy but forgot to turn it off, which caused the flood of gold. He was beaten hard by Prohol and bruised all over his body.

7. (Artem) also beat Prohol for revenge for Paul, and was imprisoned (in the gendarmerie) for six days. Paul lost his job.

Short answer: 1Why was Paul fired from the principal? What is the root cause?

Answer: The immediate cause: Twelve-year-old Paul went to Father Vasily's house to take the make-up exam, sprinkled a pinch of cigarette dust on the dough used for the Easter steamed cake, and was kicked out of school.

Root cause: Paul was repeatedly insulted by Father Vasily because of his doubts about the Bible, and was kicked out of the classroom, where he was punished for several weeks and punished every day for standing in a corner.

2.A brief description of Paul's life in the station cafeteria.

Answer: Paul has worked hard in the station canteen for two years, where Paul has done more work than anyone else, and he has never known fatigue, but these two years have allowed him to experience the warmth and coldness of human feelings, and realize the injustice and darkness of society. Seeing the cousins gambling in the storeroom, Paul was furious; Seeing the kind-hearted and friendly female worker Floxia being betrayed by her cousin Prohol, Paul was heartbroken.

In such an environment, Paul still insists on reading to Klimka, a young apprentice in the kitchen, every day, and it is also in the communication with the apprentice that Paul shows a rebellious personality trait, hoping to leave this tomb-like place.

1. The Yellow River is compared to a giant, the main stream is the torso, and the countless tributaries are the "giants" with thousands of "iron arms".

2. The Yellow River nurtures and nourishes the sons and daughters of China, and the heroes and sons and daughters of the Chinese nation united are thousands of "iron arms", using thousands of "iron arms" to resist the invaders.

Because the Yellow River flows through the Loess Plateau, the Loess Plateau is a thousand ravines.

1. Jiaoliu Line, 2. Beijing-Guangzhou Line, 3. Beijing-Kowloon Line. Beijing-Guangzhou high-speed railway. 4. Beijing-Shanghai line. There is the Beijing-Shanghai high-speed railway.