What Is A Neutral Oxide?

wallpapers Resource 2020-12-01
Oxides are compounds (of course they must be pure). Its composition contains only two elements, one of which must be oxygen element, if the other is a metal element, it is called a metal oxide; if the other is not a metal element, it is called a non-metal oxide.
 
In a broad sense, oxide refers to a binary compound composed of oxygen and another chemical element, such as carbon dioxide (CO₂), calcium oxide (CaO), carbon monoxide (CO), and so on. However, the compound formed by the combination of oxygen and the more electronegative fluorine is generally called fluoride rather than oxide. Note: There are only two elements in oxide, one of which must be oxygen, and the other can be metal or non-metal.

 
Amphoteric oxide
 
Because it is a critical element, it has a certain degree of metallicity and a certain degree of non-metallicity. It can react with strong acids and bases at the same time, so it is called amphoteric, and the corresponding hydrate is also amphoteric hydroxide. Such as Al2O3, ZnO, MnO2, etc.
 
Neutral/no salt
 
Oxides that cannot react with acids to form salt and water, and cannot react with bases to form salt and water are called neutral oxides/non-salt oxides.
Such as H2O, NO, NO2, CO, etc. belong to neutral oxides/non-salted oxides.
The reason why nitrogen dioxide is a non-salt oxide is that the valences of these two elements in the oxyacids of manganese and nitrogen are not +4. (The corresponding oxide of nitrate is dinitrogen pentoxide instead of nitrogen dioxide, or the anhydride of nitric acid is dinitrogen pentoxide instead of nitrogen dioxide)
What needs to be explained here is: some non-salt oxides can "salt" under certain conditions.
Although carbon monoxide can react with sodium hydroxide to form the sodium salt of formic acid. However, no water is formed when salt is formed, so carbon monoxide is still a non-salt-forming oxide.

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