The chemical formula by which iron wire burns in oxygen

3fe + 2o2 = fe3o4

Fe3O4 is formed by ignition in pure oxygen.

Fe2O3 is rust as a result of oxidation in air.

3fe+2o2===fe3o4

The generation of Fe3O4 is an objective fact.

Fe3O4 is pure, and the scientific study of Fe3O4 is not yet clear.

Forehead... Iron oxide, first to clarify the facts Ferric oxide (Fe2O3) is iron oxide (iron is +3 valence).

Another fact: Fe2O3 cannot be obtained by simply reacting iron with oxygen.

Iron burns in oxygen (note not air) 3Fe + 2O2 = ignition = Fe3O How does iron produce Fe2O3?

4fe+6h2o+3o2=4fe（oh）32fe（oh）3=fe2o3+3h2o

fe2o3 is rusty...... thing

3fe+2o2=fe3o4

The resulting ferric oxide is a mixture of ferrous oxide and iron oxide.

3Fe + 2O2 = Fe3O4 (ferric tetroxide).

The valency of iron has two trivalents and one bivalent.

Iron + oxygen ignites ferric tetroxide.

fe o2 fe3o4

It's Fe3O4 (in fact, it's a mixture, made of!) Fe2O3 and FEO! )

1. The chemical equation of iron combustion in oxygen: 3Fe + 2O2 = Fe3O4. Iron burns in oxygen, the reactants are iron and oxygen, and the product is black solid ferric tetroxide.

2. Experimental phenomenon of iron combustion in oxygen: iron wire burns violently in oxygen, sparks in all directions, releases a large amount of heat, and generates a black solid.

3. Iron usually has three oxides: ferrous oxide FeO, iron oxide Fe2O3 and ferric tetroxide Fe3O4, and can generate different oxides under different conditions. Fe and O2 react directly, and when it does not exceed 570, it burns, and the product is Fe3O4; When the temperature is higher than 570, FEO is generated; When the temperature is as high as 1300, the generated FeO can be further oxidized to form Fe2O3.

1. The chemical equation of iron wire combustion in oxygen: 3Fe+2O2Fe3O4.

2. Pay attention to the suspicion of the shed: if the iron wire is rusty, it must be polished with sandpaper, and the iron wire should be made into a spiral, so that the trace can increase the heating area and can continue to burn.

3. Tie a match at the end of the wire, so that the purpose of ignition can be achieved.

4. Wait for the match to be ready to burn before putting it into the gas cylinder filled with oxygen, so as not to consume too much oxygen when the match burns.

3Fe + 2O2 = Ignition = Fe3O4

Phenomenon: Iron wire burns violently in oxygen, sparks everywhere, and black ferric tetroxide is formed. Note: To prevent melted splashes from bursting the bottom of the bottle, place a small amount of water or fine sand on the bottom of the bottle beforehand.

Iron wire burned in oxygen.

Chemical equation. For: 3fe

2o2=ignite=

fe3o4 hopes it helps.

The chemical equation for the combustion of iron wire in oxygen nucleus is as follows: 3Fe + 2O2 = ignition = Fe3O4 Phenomenon: Iron wire burns violently in oxygen and sparks to form black ferric tetroxide.

Note: In order to prevent the melted spill from bursting the bottom of the bottle, put a small amount of water or fine sand at the bottom of the bottle beforehand.

Experiments on the combustion of iron wire in oxygen.

The chemical equation is: 3Fe + 2O = Ignition = Fe O Phenomenon: The iron wire burns violently, sparks shoot in all directions, generating a black solid and releasing heat;

Precautions: Use sandpaper to polish the iron blind silk; The thin iron wire is wound into a spiral shape to increase the contact area between the iron wire and oxygen; Tie a match at the lower end of the wire, the function is to ignite the wire, and when the match is about to burn out, then stretch the grinding wire into the gas collection cylinder to avoid the burning of the match and consume the oxygen in the bottle; Put a small amount of water at the bottom of the gas collection cylinder, the function is to prevent the generated high-temperature melt from splashing and bursting the bottom of the gas collection cylinder, or it can be replaced by fine sand.