Will iron nails rust when placed in distilled water?

will rust. Many people think that distilled water contains no air, no minerals, and is a pure water.

Actually, this idea is not true, distilled water refers to water that does not contain minerals. It is often used in laboratories, and the most classic chemical experiment is "Determination of water hardness", in which distilled water is used to compare magnesium and calcium in mineral water.

However, distilled water does not reject air, and it is not marked to isolate air from the moment it is made. Hehe, so normal distilled water contains air, and from the index of air content, there is no difference between distilled water and normal water, but tap water contains a certain amount of chlorine that plays a role in disinfection.

Therefore, iron nails will rust when placed in distilled water, and the principle of iron rust is that Fe (iron), H2O (water) and O2 (oxygen) react, which is an oxygen-absorbing corrosion reaction.

At the interface between water and air, rust occurs the fastest, as there is plenty of water and oxygen.

Hehe, I believe that you are smart and have understood what is going on!

Yes, especially near the water surface, there will be obvious oxygen corrosion: 4Fe + 3O2 + 6H2O = 4Fe(OH)3

To add, sealing only means that there is no communication with the outside world, and the outside air does not come in, but the container itself should carry air.

Yes, but the difference with ordinary water is that it will rust after a long time.

Yes, there are the most places in contact with the water. Stupid people don't know this!! Because the place in contact with the water surface is hydrated and the air is abundant.

The cause of metal rust is mainly the action of electrochemical corrosion and air oxidation, and pure metal or active metal is mainly due to the oxidation reaction between the metal surface and the oxygen in the air, and the metal oxide is generated on the metal surface, that is, rust. If the metal contains more impurities, these impurities will form a chemical galvanic battery with the metal, and electrochemical corrosion will occur, thereby oxidizing the metal to form metal oxides.

Some metals, such as alumina, can rust and produce a dense oxide film that prevents further oxidation. However, the thinning of the oxide film produced after the rusting of some metals accelerates the oxidation of the metal, such as rust.

Because it will bind to water and carbon dioxide.

Rust is generated. The specific chemical equation is:

4fe+6h2o+5o2=4fe(oh)3,2fe(oh)3=fe2o3+3h2o

Why is it slow? Because this is a slow response, is the landlord a junior high school or above children's shoes? This should be known.

a. The iron nail is immersed in vegetable oil and isolated from water and oxygen, so it is not easy to rust, so it is a mistake;

b. When immersed in seawater, the solution of carbon, iron and sodium chloride in the iron nail can constitute the galvanic battery for electrochemical corrosion, so it is most likely to rust, so B is correct;

c. The iron nail is placed in dry air and does not contact with water, so it is not easy to rust, so C is wrong;

d. There is no oxygen in the distilled water, so when the iron nail is soaked in the distilled water, it isolates the oxygen, so it is not easy to rust, so D is wrong

Therefore, choose B

Put it in the air? There is water vapor and oxygen in the air. Strictly speaking, iron will rust if left for a long time. In detail, there are acidic gases such as carbon dioxide that dissolve in water, which will rust over time.

However, you are talking about iron nails, now iron nails have been treated with surface oxidation, under normal conditions, in the air, without contact with water, acidic substances and alkaline substances, they can be kept for several years or even decades without rusting.

The basement and the corners of the room must be heavy and rust quickly. A ventilated, irritable place will definitely last longer.

It will rust because of the water vapor.

It will rust because there is water vapor in the air.

Iron nails do not come into contact with water or acidic gases and do not rust.

1) The iron nail is sealed with desiccant in a dry test tube; It is to put the iron nail into the front bureau of distilled water that is quickly cooled after boiling, and the upper part is exposed to the air; The comparison of these two experiments can show that Brother Tiesheng needs water without rust, so fill in: water;

2) To prevent iron rust is to destroy the iron rust of the dust so that the conditions can be painted on the surface of iron, so fill: paint

a In dry air, iron does not come into contact with water and is not easy to rust;

b Submerged in distilled water, iron does not come into contact with oxygen, and is not easy to rust;

c Iron nails are soaked in salt water, and the iron is in full contact with water and oxygen, and it is easy to rust; Moreover, salt water can promote the rate of iron rusting, which is the most susceptible to rusting; Hold Chadan.

D The iron nails are soaked in the oil of the plant section, and the iron nails are isolated from oxygen and water, and they are not easy to rust, so choose C