What is water – Troubleinthepeace

Water (H2O) is a chemical compound of oxygen and hydrogen. Has the chemical formula H2O. With special physico-chemical properties (e.g. dipole, Hydrogen bonding and density anomaly). They are a very important substance in many sciences and in life.

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Taste And Smell Of Water:

Ordinary purified water is described as tasteless and odorless. Although humans have special sensors that can sense the presence of H2O in the mouth. However, from conventional sources (including bottled mineral H2O) there are often many dissolved substances. Can make it have many different flavors and smells. Humans and other animals have developed senses that allow them to judge the quality of H2O by avoiding water that is too salty or foul.


Water with human life.

Structure and Properties of Water Molecule:

Color Of Water:

Natural color is usually determined by suspended solids, suspended matter. Or by reflecting the sky. This means that the color depends on the angle of reflection and refraction of the incident light.

Light in the visible electromagnetic spectrum can pass through several meters of pure water (or ice). Without significant absorption, so it looks transparent and colorless. Such aquatic plants, algae. And other photosynthetic organisms can live hundreds of meters deep. Because sunlight can reach them. H2O vapor is essentially invisible as a gas.

However, with a thickness of 10 meters or more, the color of H2O (or ice) is turquoise (light green). As its absorption spectrum has minimal sharpness at the corresponding color of light (1/227 m−1 at 418 nm). Colors become stronger and darker with increasing thickness. (Actually no sunlight reaches parts of the ocean below 1000 meters.) On the other hand, ultraviolet and ultraviolet rays are strongly absorbed by H2O. And due to the lack of light and the immense pressure.


Structure Of Water:

The refractive index of liquid (1,333 at 20 °C) is much higher than that of air (1.0), similar to that of alkanes and ethanol, but lower than that of glycerol (1.473), benzene (1.501), carbon disulfide (1,627), and common glasses (1.4 to 1.6). The refractive index of the tape (1.31) is lower.

They have no definite shape. It has only one form at a time in the object it contains. It has a molecular structure that slides over one another and is therefore very easy to lose shape. However, H2O is very difficult to compress, taking advantage of this property, people apply Pascal’s principle to hydraulic compressors.

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Water resources are exhausted

The H2O molecule consists of two hydrogen atoms and one oxygen atom. Geometrically, the water molecule has a bond angle of 104.45°. Since the free electron pairs take up a lot of space, this angle deviates from the ideal angle of the tetrahedron. The length of the OH bond is 95.84 picometers.

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The H2O molecules interact with each other through hydrogen bonding and thus have a large molecular attraction. This is not a permanent link. The bonding of H2O molecules via hydrogen bonding only lasts for a fraction of a second. The water molecules then separate from this bond and bond with other molecules.

The physicochemical properties of water:

The structure of the H2O molecule, which forms hydrogen bonds between molecules, is the basis for many properties. So far some properties are still a puzzle for researchers although H2O has been studied for a long time.

Melting point and boiling point were used by Anders Celsius as two landmarks for Celcius degrees. Specifically, the freezing point of water is 0 degrees Celcius. The boiling point (760 mm Hg) is 100 degrees Celcius. Has a relatively high boiling point due to hydrogen bonding.

Frozen H2O is called ice. Vaporized H2O is called water vapor.



Let’s protect water resources

Learn Water Pressure:

Under normal pressure the density (density). The highest is at 4 °C: 1 g/cm³ that is because water continues to expand. When the temperature drops below 4 °C. This was not observed for any other substance. This means: With a temperature above 4°C, it has the same properties as all other objects of hot expansion and coldness. But with temperatures below 4 °C, H2O cools and expands, and contracts hot. Due to the special geometry of the molecule (with a bond angle of 104.45°). When cooled, the molecules have to move away to form open hexagonal crystal bonds. Therefore, the density of the rock form is lighter than that of the liquid form.

H2O is a good solvent due to its dipole properties. Polar or ionic compounds such as acids, alcohols and salts are all soluble in H2O. Solubility plays a very important role in biology. Because many biochemical reactions take place only in H2O solution.

Some Specific Responses:

Chemically, H2O is an amphoteric. Can react as one, can be understood simply when an acidic oxide or a basic oxide reacts with H2O to give an acidic or basic solution, respectively. At 7 pH (neutral) the content of hydroxide ions (OH–) is in balance with the content of hydronium (H3O+). When reacting with a stronger Acid such as HCl, they react as an alkali:

HCl + H2O H3O+ + Cl–

With Ammonia they react as an acid:

NH3 + H2O ↔ NH4+ + OH–

In industry, they can be liquefied by melting ice, or filtered from seawater and impure sources by various methods such as filtration, extraction, separation, distillation, evaporation, etc. condensate case.

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Sawa team thank you for taking the time to read our sharing. Considered as a seemingly limitless source of life. But in reality, H2O is not infinite. With our attitude, we will use water in the most efficient way. Please contact Sawa Vietnam via Hotline 19002296 for fastest support.

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