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Water is one of the best solvents and is a hydrogen oxide with the chemical formula H2O. Under normal conditions, this substance is able to interact with many oxides, basic or acidic, as well as with alkali metals.

Water can exist in three aggregative states: solid, liquid, gaseous. And in none of these conditions, it absolutely does not smell. Do not have water, ice or steam and no taste.

It is believed that some vertebrates can sense the smell of water. But the human olfactory system does not react to this substance in any way.

Distilled water is thus tasteless and odorless. However, in nature, this substance is almost never found in its pure form. Since water is a good solvent, it always contains various impurities.

As the scientists found out, the water flow by land annually discharges about 50 million tons of various substances into the oceans and seas. At the same time, not only a lot of salts, but also a huge amount of all sorts of organic impurities are present in natural water.

Rotting plants give the water in lakes, rivers and ponds a smell of mud. Also, natural water may smell, for example, earth and mold. It happens so when it is infected with fungi or microorganisms. If industrial enterprises do not comply with environmental safety standards, the water in ponds, lakes and rivers located next to them may acquire a chemical or medicinal odor.

Chlorine, contrary to popular belief, when used properly for disinfection, does not impart any odor or off-taste to water. However, this substance is able to react with many types of elements dissolved in water, as a result of which the characteristic smell of “bleach” appears.

Water molecules are bipolar, and therefore are combined into groups with the appearance of a strong hydrogen bond. It takes a lot of energy to break this bond.

It is because of the bipolarity of the molecules that water has a rather high boiling point. Without hydrogen bonds, it would not be equal to 100 ° C, but only 80 ° C.

The solid form of almost every substance has a greater density than a liquid. Water in this regard is an exception. After freezing, its volume increases by almost 8%. That is why in the reservoirs the ice does not sink, but always floats on the surface.

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