What kind of oxide is water



Hydrogen oxides (also Hydrogen oxides) are compounds that only consist of hydrogen (H) and oxygen (O).

The following connections are of technical importance:

 

water

Molecular hydrogen H2 reacts with molecular oxygen O2exothermic to water (H.2O) in a molar ratio of two moles of H2 to 1 mole of O2:

During this so-called oxyhydrogen reaction, energy is released. This is the 572.4 kJ given in the equation per mole of water.

If the two simple hydrogen atoms (Protium1H) replaced by deuterium atoms twice as heavy, one obtains heavy water (D.2O). If only one of the two H atoms has a deuterium nucleus, it is correctly referred to as semi-heavy water (HDO); but often is also the name heavy water common. If it is not deuterium but tritium, one speaks of super-heavy water. These two forms of water have slightly different physical properties. For example, the melting point is 3.82 ° C and the boiling point is 101.42 ° C for heavy water, and 4.48 ° C and 101.51 ° C for superheavy water, respectively. The chemical properties are largely the same as those of ordinary water, these two forms are only slightly less reactive.

Water probably plays the most important role in the functioning and viability of organisms. In the inanimate geosphere, it is an important medium in geological and ecological elementary processes. Due to the role of water in relation to weather and climate, as a landscape designer in the course of erosion and due to its economic importance in the areas of agriculture, forestry and energy, it is also in many ways with history, economy and culture of human Connected to civilization. The science that deals with the spatial and temporal distribution of water and its properties is called hydrology.

Hydrogen peroxide

Hydrogen peroxide is an unstable compound made up of two hydrogen and two oxygen atoms (H.2O2). The compound can spontaneously break down into water and oxygen:

H2O2 is very reactive and is therefore mixed with stabilizing substances. It is a popular oxidizing agent because the only byproduct is water.

More oxides

Another, but rarer, oxide is dihydrogen trioxide (H.2O3). The connection is even more unstable than H2O2 and disintegrates at a temperature of -40 ° C. Dihydrogen trioxide has hardly any technical uses and is more of theoretical interest.

The oxonium ions H are of particular importance for the pH value3O+ (also called hydronium ions). In a sense, it is a form of water that is "expanded" by a proton. They form automatically in water (autoprotolysis), but especially when acid is added. These ions are extremely unstable and only exist for picoseconds before releasing the third proton to another water molecule. The hydroxide ions OH- are, so to speak, the opponents of the H3O+-Ions. They arise primarily in the presence of basic compounds, but also during autoprotolysis. The concentration of OH- and H3O+ determines the pH value.

Categories: Hydrogen Compound | Oxygen connection