The most important substance of our planet, unique in its properties and composition, is, of course, water.
After all, it is thanks to it that there is life on Earth, while there is no life on other objects of the Solar System known today.
Solid, liquid, in the form of steam - any one is necessary and important.
Water and its properties are the subject of study of a whole scientific discipline hydrology.
The amount of water on the planet
If we consider the indicator of the amount of this oxide in all aggregate states, then it is about 75% of the total mass on the planet.
At the same time, it is necessary to take into account the bound water in organic compounds, living beings, minerals and other elements.
water and its properties
If we take into account only the liquid and solid state of water, the indicator will fall to 70.8%.
Let's consider how these percentages are distributed, where the substance in question is contained.
1. Salt water in the oceans and seas, salt lakes on Earth 360 million km^2 .
Fresh water is distributed unevenly: 16.3 million km^2 of it is encased in ice in the glaciers of Greenland, the Arctic, and Antarctica .
Fresh rivers, swamps and lakes contain 5.3 million km^2 of hydrogen oxide.
The underground water is 100 million m^3 .
That is why astronauts from distant outer space can see the Earth in the form of a blue ball with rare inclusions of land.
Water and its properties, knowledge of the structural features are important elements of science.
In addition, recently humanity is beginning to experience a clear shortage of fresh water.
Maybe such knowledge will help in solving this problem.
If we consider these indicators, we will immediately understand the properties that this amazing substance exhibits.
So, a water molecule consists of two hydrogen atoms and one oxygen atom, so it has the empirical formula H 2 O.
In addition, the electrons of both elements play an important role in the construction of the molecule itself.
Let's see what the structure of water and its properties are.
It is obvious that each molecule is oriented around the other, and together they form a common crystal lattice.
Interestingly, the oxide is built in the form of a tetrahedron - an oxygen atom in the center, and two pairs of electrons and two hydrogen atoms around it are asymmetric.
If you draw lines through the centers of the nuclei of atoms and connect them, you will get exactly a tetrahedral geometric shape.
The angle between the center of the oxygen atom and the hydrogen nuclei is 104.5 ^0 s.
The presence of oxygen electron pairs, as well as its greater electron affinity in comparison with hydrogens, ensure the formation of a negatively charged field in the molecule.
In contrast, the hydrogen nuclei form a positively charged part of the compound.
Thus, it turns out that the water molecule is a dipole.
This determines what water can be, and its physical properties also depend on the structure of the molecule.
For living beings, these features play a vital role.
These include the crystal lattice, boiling and melting points, and special individual characteristics.
The structure of the crystal lattice of hydrogen oxide depends on the aggregate state.
It can be solid ice, liquid basic water under normal conditions, gaseous steam when the water temperature rises above 100 ^0 C. Beautiful patterned crystals form ice.
The grid is generally loose, but the connection is very strong, the density is low.
You can see it on the example of snowflakes or frosty patterns on the glasses.
In ordinary water, the lattice does not have a constant shape, it changes and passes from one state to another.
A water molecule in outer space has the correct shape of a ball.
However, under the influence of the earth's gravity, it is distorted and in the liquid state takes the form of a vessel.
The fact that the structure of hydrogen oxide is a dipole determines the following properties: high thermal conductivity and heat capacity, which can be traced in the rapid heating and long cooling of the substance, the ability to orient around itself both ions and individual electrons, compounds.
This makes water a universal solvent (both polar and neutral).
The composition of water and the structure of the molecule explain the ability of this compound to form multiple hydrogen bonds, including with other compounds that have unshared electron pairs (ammonia, alcohol, and others).
The boiling point of liquid water is 100 ^ 0 C, crystallization occurs at +4^0 C.
If you increase the pressure, the boiling point of the water will increase dramatically.
So, at high atmospheres, lead can be melted in it, but it will not even boil (over 300 ^ 0 C).
The properties of water are very important for living beings.
For example, one of the most important is the surface tension.
This is the formation of the thinnest protective film on the surface of hydrogen oxide.
We are talking about water in a liquid state.
It is very difficult to break this film by mechanical action.
Scientists have found that it will take a force equal to a weight of 100 tons.
The film is obvious when the water drips from the tap slowly.
It can be seen that it seems to be in some kind of shell, which stretches to a certain limit and weight and comes off in the form of a round droplet, slightly distorted by gravity.
Due to the surface tension, many objects can be on the surface of the water.
Insects with special adaptations can move freely on it.
Water and its properties are anomalous and unique.
According to organoleptic indicators, this compound is a colorless liquid without taste and smell.
What we call the taste of water is the minerals and other components dissolved in it.
The electrical conductivity of hydrogen oxide in the liquid state depends on how many and what salts are dissolved in it.
Distilled water, which does not contain any impurities, does not conduct electric current.
Ice is a special state of water.
In the structure of this state, the molecules are connected to each other by hydrogen bonds and form a beautiful crystal lattice.
But it is quite unstable and can easily split, melt, that is, deform.
There are many voids between the molecules, the dimensions of which exceed the dimensions of the particles themselves.
Due to this, the density of ice is less than that of liquid hydrogen oxide.
This is of great importance for rivers, lakes and other fresh water bodies.
After all, in winter, the water in them does not freeze completely, but is only covered with a dense crust of lighter ice that floats up.
If this property was not characteristic of the solid state of hydrogen oxide, then reservoirs would freeze through.
Life under water would be impossible.
In addition, the solid state of water is of great importance as a source of a huge amount of fresh drinking water.
A special property of water can be called the phenomenon of a triple point.
This is a state in which ice, steam and liquid can exist simultaneously.
This requires such conditions as:
* high pressure - 610 Pa; * Temperature 0.01^0 C.
The water transparency indicator varies depending on foreign impurities.
The liquid can be completely transparent, opalescent, cloudy.
Waves of yellow and red colors are absorbed, violet rays penetrate deeply.
Water and its properties are an important tool in understanding many life processes.
Therefore, they are studied very well.
So, hydrochemistry is interested in water and its chemical properties.
Hardness is a property that is explained by the presence of calcium and magnesium salts, their ions in solution.
It is divided into permanent (salts of the named metals: chlorides, sulfates, sulfites, nitrates), temporary (bicarbonates), which is eliminated by boiling.
In Russia, water is softened chemically before use for better quality.
Mineralization, a property based on the dipole moment of hydrogen oxide.
Due to its presence, molecules are able to attach many other substances, ions to themselves and retain them.
This is how associates, clathrates and other associations are formed.
Redox properties, as a universal solvent, catalyst, associate, water is able to interact with a variety of simple and complex compounds.
With some, it acts as an oxidizer, with others - on the contrary.
How the reducing agent reacts with halogens, salts, some less active metals, with many organic substances.
The last transformations are studied by organic chemistry.
Water and its properties, in particular, chemical ones, show how universal and unique it is.
As an oxidizer, it reacts with active metals, some binary salts, many organic compounds, carbon, methane.
In general, chemical reactions involving this substance need the selection of certain conditions.
It is from them that the outcome of the reaction will depend.
Biochemical properties: water is an integral part of all biochemical processes of the body, being a solvent, catalyst and medium.
Interaction with gases with the formation of clathrates.
Ordinary liquid water can absorb even chemically inactive gases and place them inside the cavities between the molecules of the internal structure.
Such compounds are commonly called clathrates.
With many metals, hydrogen oxide forms crystal hydrates, in which it is included unchanged.
For example, copper sulfate (CuSO 4 *5H 2 O), as well as ordinary hydrates (NaOH*H 2 O and others).
Water is characterized by compound reactions, in which the formation of new classes of substances (acids, alkalis, bases) occurs.
They are not redox.
Electrolysis: under the influence of an electric current, the molecule decomposes into composite gases hydrogen and oxygen.
One of the ways to get them in the laboratory and industry.
From the point of view of the Lewis theory, water is a weak acid and a weak base at the same time (ampholite).
That is, we can say about a certain amphotericity in chemical properties.
a water molecule
Water and its beneficial properties for living beings
It is difficult to overestimate the importance that hydrogen oxide has for all living things.
After all, water is the very source of life.
It is known that without it, a person would not be able to live even a week.
Water, its properties and value are simply colossal.
1. It is a universal solvent, that is, capable of dissolving both organic and inorganic compounds, acting in living systems.
That is why water is the source and medium for the course of all catalytic biochemical transformations, with the formation of complex vital complex compounds.
The ability to form hydrogen bonds makes this substance universal in withstanding temperatures without changing the aggregate state.
If this were not the case, then at the slightest decrease in degrees, it would turn into ice inside living beings, causing cell death.
For a person, water is the source of all the basic household goods and needs: cooking, washing, cleaning, taking a bath, bathing and swimming, and so on.
Industrial plants (chemical, textile, machine building, food, oil refining and others) they would not have been able to carry out their work without the participation of hydrogen oxide.
Since ancient times, it was believed that water is a source of health.
It was used and is used today as a medicinal substance.
Plants use it as the main source of nutrition, due to which they produce oxygen - the gas thanks to which life exists on our planet.
There are dozens more reasons why water is the most widespread, important and necessary substance for all living and artificially created human objects.
We have given only the most obvious, the main ones.
water its signs and properties
Hydrological water cycle
In other words, it is its cycle in nature.
A very important process that allows you to constantly replenish the disappearing water reserves.
How does it happen?
There are three main participants: underground (or ground) waters, surface waters and the World Ocean.
The atmosphere, which condenses and gives out precipitation, is also important.
Also, plants (mainly trees) are active participants in the process, which are able to absorb a huge amount of water per day.
So, the process is as follows.
Groundwater fills the underground capillaries and flows to the surface and the world Ocean.
Then the surface water is absorbed by plants and transpired into the environment.
There is also evaporation from huge areas of oceans, seas, rivers, lakes and other reservoirs.
Once in the atmosphere, what does water do?
It condenses and spills back in the form of precipitation (rain, snow, hail).
If these processes did not occur, then the reserves of water, especially fresh water, would have run out long ago.
That is why people pay great attention to the protection and normal hydrological cycle.
The concept of heavy water
In nature, hydrogen oxide exists in the form of a mixture of isotopologists.
This is due to the fact that hydrogen forms three types of isotopes: protium ^ 1 N, deuterium ^2 N, tritium ^3 N. Oxygen, in turn, also does not lag behind and forms three stable forms: ^16 O, ^17 O, ^18 O.
It is thanks to this that there is not just ordinary protium water of the composition H 2 O (^1 N and ^16 O), but also deuterium and tritium.
water and its useful properties
At the same time, it is deuterium (^2 N) that is stable in structure and form, which is included in the composition of almost all natural waters, but in small quantities.
It is called heavy.
It is somewhat different from the usual or light in all respects.
Heavy water and its properties are characterized by several points.
1. Crystallizes at a temperature of 3.82 ^0 C.
2. Boiling is observed at 101.42 ^0 C.
3. The density is 1.1059 g / cm^3.
4. As a solvent, it is several times worse than light water.
5. It has the chemical formula D 2 O.
When conducting experiments showing the effect of such water on living systems, it was found that only some types of bacteria are able to live in it.
It took time for the colonies to adapt and acclimatize.
But, having adapted, they completely restored all vital functions (reproduction, nutrition).
In addition, they have become very resistant to the effects of radioactive radiation.
Experiments on frogs and fish did not give a positive result.
Modern applications of deuterium and the heavy water formed by it are nuclear and nuclear power engineering.
Such water can be obtained in the laboratory using ordinary electrolysis - it is formed as a by product.
Deuterium itself is formed during multiple distillations of hydrogen in special devices.
Its application is based on the ability to slow down neutron syntheses and proton reactions.
It is heavy water and hydrogen isotopes that are the basis for creating a nuclear and hydrogen bomb.
Experiments on the use of deuterium water by people in small quantities have shown that it does not last long - a complete withdrawal is observed in two weeks.
It is impossible to use it as a source of moisture for life, but the technical significance is simply enormous.
Meltwater and its application
The properties of such water have been defined by people since ancient times as curative.
It has long been noticed that when snow melts, animals try to drink water from the formed puddles.
Later, its structure and biological effect on the human body were thoroughly investigated.
heavy water and its properties
Meltwater, its signs and properties are in the middle between ordinary light and ice.
From the inside, it is formed not just by molecules, but by a set of clusters formed by crystals and gas.
That is, there is hydrogen and oxygen inside the voids between the structural parts of the crystal.
In general, the structure of meltwater is similar to the structure of ice - the structure is preserved.
The physical properties of such a hydrogen oxide vary slightly in comparison with ordinary ones.
However, the biological effect on the body is excellent.
When water is frozen, the first fraction turns into ice, the heavier part is deuterium isotopes, salts and impurities.
Therefore, this core should be removed.
But the rest is pure, structured and useful water.
What is the impact on the body?
The scientists of the Donetsk Research Institute named the following types of improvements:
1. Acceleration of recovery processes.
2. Strengthening the immune system.
3. In children, after inhalation with such water, colds are restored and cured, cough, runny nose and so on pass.
4. Improves breathing, the condition of the larynx and mucous membranes.
5. The general well being of a person, activity increases.
Today, there are a number of supporters of treatment with melt water, who write their positive reviews.
However, there are scientists, including doctors, who do not support these views.
They believe that there will be no harm from such water, but there is little benefit either.
Energy industry
Why can the properties of water change and recover during the transition to different aggregate states?
The answer to this question is as follows: this connection has its own information memory, which records all changes and leads to the restoration of the structure and properties at the right time.
The bioenergetic field, through which a part of the water passes (the one that comes from space), carries a powerful charge of energy.
This pattern is often used in the treatment.
However, from a medical point of view, not every water is able to have a beneficial effect, including informational.
Structured water - what is it?
This is a water that has a slightly different structure of molecules, the arrangement of crystal lattices (such as is observed in ice), but it is still a liquid (thawed also belongs to this type).
In this case, the composition of water and its properties from a scientific point of view do not differ from those that are characteristic of ordinary hydrogen oxide.
Therefore, structured water cannot have such a wide therapeutic effect, which is attributed to it by esotericists and supporters of alternative medicine.
