Experiments on the production of ferric tetroxide from iron and oxygen

1 To increase the contact area with oxygen, increase the number of wires, 2 Tie a match to make it easier for the iron to burn.

3. After the match is burned out, the wire cannot be ignited, and too many matches will consume a lot of oxygen, which will affect the effect of the reaction between the wire and oxygen.

4. Prevent the high-temperature iron from falling to the bottom of the bottle and causing the bottom of the bottle to burst.

5. Prevent excessive heat release from the violent combustion of a large amount of iron.

1.In order to increase the area of contact with oxygen 2In order to ignite the wire in oxygen 3

As long as the flame is in contact with the wire, I recommend using red-hot coal 4Prevent the high-temperature ferric tetroxide from splashing on the bottle and causing the bottle to burst 5If it is too fast, the oxygen in the bottle will pour out.

1.Increase the heating area 2Bring the temperature of the wire to the ignition point 3Prevent matches from burning and consuming the oxygen inside the bottle 4Preventing the solids generated by the burning of the wire from splashing to the bottom of the bottle is the rupture of the gas collection cylinder 5Prevents the escape of oxygen from the upper part.

At room temperature, iron and oxygen are used to form ferric oxide.

Iron and high-temperature water vapor produce ferric tetroxide.

As for the combustion state, it is to generate ferric tetroxide, I think it should be explained according to the oxidation of oxygen, oxygen is oxidized, but not particularly strong, it can oxidize iron, iron has valence, that is, +2, +3 valence, when iron is oxidized by oxygen, they are manifested together, so there is ferric tetroxide.

Iron is slowly oxidized in the air to form ferric oxide, while iron ignites in purified oxygen to form ferric oxide.

When it reacts violently with oxygen, it produces ferric oxide, and slowly oxidizes ferric oxide.

Iron burns in oxygen: 3Fe + 2O2 = ignition = Fe3O4

Phenomena: (1) Burning violently, sparks radiating (2) emitting heat (3) Forming a black solid.

Note: A small amount of water should be placed at the bottom of the bottle to prevent the generated solid limb material from splashing down and bursting the bottom of the bottle.

3Fe + 2O2 = ignited Fe3O4

4fe+3o2=2fe2o3

The formation of ferric oxide is produced when it reacts violently with oxygen, while ferric oxide is slowly oxidized; Fe burns violently in oxygen at a very high temperature, causing Fe2O3 to decompose to form Fe3O4

In Fe3O4, iron shows two valences, one ferrous ion shows +2 valence, and two iron ions show +3 valence, so ferric oxide can be regarded as a compound composed of FeO and Fe2O3, which can be expressed as FeO·Fe2O3, and cannot be said to be a mixture composed of FeO and Fe2O3, which belongs to pure substances. [ 6Fe2O3 = High temperature = 4Fe3O4 + O2 (gas); Similarly, Fe3O4 is easily oxidized to iron oxide at high temperatures. 4Fe3O4+O2=High temperature=6Fe2O3].

The reaction of iron and oxygen alone can be slowly oxidized to iron oxide at low temperatures (without reaching the ignition point of iron), and ferric oxide is near the ignition point of iron (at higher temperatures, ferrous oxide near 2000 degrees Celsius).

To form ferric oxide, you can easily obtain ferric oxide with the help of other substances such as the rusting process, where water is essential, or by using oxidizing substances that are stronger than oxygen.

The oxides produced by the combustion reaction must tend to be the most stable oxides. The chemical properties of ferric tetroxide are more stable than those of ferric iron and ferric oxides.

In fact, oxygen can oxidize iron to 3-valent. But at high temperatures, ferric iron has a strong oxidizing effect on iron, but it cannot oxidize iron to ferric iron, only iron can be oxidized to 8 3 valence, and ferric iron is reduced to 8 3, so that ferric tetroxide is formed. Whereas, ferric oxide is chemically stable and oxygen cannot continue to oxidize it.

As can be seen from the above, ferric oxide is not composed of ferrous oxide and iron oxide, where the valency of iron is 8 3 valence.

First of all, ferric oxide is a mixture of iron oxide and ferrous oxide. Iron in iron oxide is positive trivalent, and iron in ferrous oxide is positive bivalent.

When iron is burned in oxygen, iron is violently oxidized (that is, oxygen is extremely oxidative at this time), so iron will be oxidized to positive trivalent iron, but because this reaction process is very violent and rapid, there will be a part of iron that cannot fully react and form part of positive iron, and finally form the product of iron tetroxide. Hope to adopt.

The high combustion temperature of iron in oxygen causes the formation of ferrous oxide after the decomposition of part of ferric oxide, which is then combined with Fe2O3 to form a more complex oxide ferric tetroxide.

So generally speaking, the oxides formed by the reaction of iron at high temperatures are ferric oxide. For example, iron reacts with water at high temperatures to produce ferric tetroxide and hydrogen. (3Fe + 4H2O = Fe3O4 + 2H2, the reaction is carried out at 3000 degrees) and at low temperature, the formation of oxygen is generally ferric oxide, and the reason is the same as above (but with strong oxidants such as concentrated sulfuric acid, part of the iron will be oxidized to Fe3+, and part of it will be oxidized to Fe2+, forming ferric oxide).

BAI tetroxide

Triferroes are not mixtures. Because du mixture is two or more substances mixed togetherAnd trioxide.

with slow oxidation in moist air to form ferric oxide.

It burns violently with oxygen to form ferric tetroxide.

Combustion in oxygen produces ferric oxide. Due to the high temperature of combustion. Therefore, part of the ferric oxide is decomposed into ferrous monoxide and oxygen.

This results in a more complex oxide. Ferric oxide. Ferric tetroxide, on the other hand, contains ferric ions.

It also contains divalent ferrous ions.

4Fe + 3O2 = 2Fe2O3 (conditional ignition).

2Fe2O3 = 4FeO+O2 (high temperature).

It is these two that are generated, and under the violent reaction, iron is oxidized into various substances, mainly these two oxides, which are combined to form ferric oxide, which forms magnetism under this special condition.