What conclusions can be drawn from the combustion of iron, magnesium, copper and aluminum in oxygen?

Iron can be burned in oxygen, and sparks splash around, emitting a large amount of heat, forming a black solid ferric tetroxide;

When magnesium is ignited, it can be burned in the air, emitting dazzling white light, emitting heat, and generating a white solid magnesium oxide;

Copper can react with oxygen to form copper oxide when heated, and it is observed that red black turns into black powder copper oxide;

3Fe+2O2=Ignition=Fe3O4,2mg+O2=Ignition=2mgo,,2Cu+O2=Heating=2Cuo;

Aluminum can be burned in oxygen, and sparks splash around, producing a white solid alumina;

4al+3o2=ignite=2al2o3

Gold is not reactive in air and oxygen, in addition, magnesium and aluminum react with oxygen in air, both of which form a white solid, and the chemical reaction equation does not write conditions.

Metal activity is obtained: magnesium > aluminum, iron > copper.

Magnesium can be burned in the air, indicating that magnesium is the most active.

Copper cannot be burned, it can only be heated and slowly oxidized, indicating that copper is the least active.

Iron and aluminum can no longer be burned in air, but can be burned in oxygen, and the activity is centered.

As for which iron and aluminum are more active, this combustion reaction cannot be confirmed.

But there is a thermite reaction that proves that aluminum is more reactive than iron.

Magnesium is the most active wave. Copper is the least active.

Aluminum according to the two-digit liveliness.

Ironclad three-dimensional liveness.

The combustion of magnesium in oxygen is that it burns violently and emits a dazzling strong light, which emits a large amount of heat to produce a white powdery solid.

Magnesium has strong reducing properties, can react with boiling water to release hydrogen, and can produce dazzling white light, magnesium and fluoride when burning.

Cavity hydrofluoric acid and chromic acid do not interact and are not attacked by caustic alkalis.

However, it is highly soluble in organic and inorganic acids, and magnesium can be directly combined with nitrogen, sulfur and halogens.

Organic chemicals, including hydrocarbons, aldehydes, alcohols, phenols, amines, lipids, and most oils, have little or no effect on magnesium.

Chemical properties of magnesium Wu Huru:

Magnesium does not interact with fluoride, hydrofluoric acid and chromic acid, nor is it attacked by caustic alkali, but it is easily soluble in organic and inorganic acids, magnesium can be directly combined with nitrogen, sulfur and halogens, etc., and organic chemicals including hydrocarbons, aldehydes, alcohols, phenols, amines, lipids and most oils have only a slight or no effect on magnesium.

But and halogenated hydrocarbons.

In the absence of water, the reaction is more vigorous (Grignard reagent is generated.

Magnesium can react with carbon dioxide, so magnesium combustion cannot be done with carbon dioxide fire extinguishers.

Fire suppression. When magnesium is burned in air, it burns violently and emits a dazzling white light, which is exothermic and produces a white solid. In vinegar, bubbles emerge quickly, float on the vinegar surface, and gradually disappear. Some fireworks and flares.

It contains magnesium powder, which takes advantage of the dazzling white light that magnesium emits when burned in the air.

Iron can be burned in oxygen, and sparks splash around, emitting a large amount of heat, forming a black solid ferric tetroxide;

When magnesium is ignited, it can be burned in the air, emitting dazzling white light, emitting heat, and generating a white solid magnesium oxide;

Copper reacts with oxygen to form copper oxide when heated.

Observing the file, Qi Song saw that the red black turned into black powder, copper oxide;

3Fe+2O2=Ignition=Fe3O4,2mg+O2=Ignition=2mgo,,2Cu+O2=Heating=2Cuo;

Aluminum can be burned in oxygen, and sparks splash everywhere to produce a white solid oxidized line Zheng aluminum;

4al+3o2=ignite=2al2o3

Gold is not reactant in air and oxygen, in addition, magnesium and aluminum in the air and oxygen reaction phenomenon, are the formation of white solid, chemical reaction equation do not write conditions.

1 Magnesium burns in air (or oxygen): 2mg + O2 ignition 2 Iron burns in oxygen: 3Fe + 2O2 ignition stove celebration Fe3O4 (does not burn in air) 3 Copper is heated in air (or oxygen):

2Cu + O2 2Cuo 4 Aluminum burns in oxygen: 4Al + 3O2 ignites 2Al2O3 (does not burn in air).

Categories: Science & Engineering.

Analysis: Aluminum is burned in oxygen, producing a more dazzling bright light, emitting a large amount of heat, and forming the gray solid Al2O3.

Magnesium burns in the air, producing a dazzling bright light that produces a white solid MGO.

Aluminum burns in oxygen, producing a more dazzling strong light, emitting a large amount of heat, and generating gray and auspicious solid Al2O3.

The wire burns violently in oxygen, and the sparks emit a large amount of heat, forming the black solid Fe3O4.

Sodium burns in the air and the flame is yellow, producing Na2O

Potassium burns in the air, and the flame is purple, generating K2O

Copper can be thermally oxidized in air or burned in oxygen to form a black solid cuo

Sulfur ignites in the air to form a pale blue flame, and in oxygen it produces a blue-purple flame to produce SO2

Carbon burns in the air, with a dazzling yellow flame, which generates CO2, and incompletely burns to produce CO

Hydrogen burns in the air with a pale blue flame to produce liquid H2O

Carbon monoxide burns in the air to produce a pale blue flame that produces CO2

There is no pattern to these problems, which substances are burned and which phenomena need to be classified and summarized, and the phenomena are similar to one category, such as hydrogen and carbon monoxide, and the phenomena are different to remember separately, such as the sparkling of iron in the air, etc. In short, learn to classify them.