What is hard water? Detailed answer

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What is hard water? Detailed answer

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What is hard water?

Water is a combination of two gases, tasteless, odorless and colorless: it consists of hydrogen, a very light gas, and oxygen, a heavier and more active gas. Water exists in three states: as a liquid, as a solid (ice), and as a gas (water vapor). But when we discuss the various qualities of water, we find that the water that exists in nature is never completely pure. It contains mineral salts, gases and living organisms dissolved in it.

We very rarely deal with just "water". For example, chemically pure water is tasteless. But we all know that water always has some kind of aftertaste. In part, this taste gives the presence of certain impurities in the water. As raindrops pass through the atmosphere, they pick up some of the gases they pass through. The most important of these gases is oxygen, which allows living organisms to exist underwater. Carbon dioxide is another important gas in water. Its presence in water solution (carbonic acid) makes water capable of eroding limestone rocks and forming caves and depressions.

The action of carbonic acid in water dissolves lime and magnesium carbonates, making the water "hard". Hard water does not produce good lather. If you boil it, then limescale will remain inside the kettle. In addition to gases, natural water contains salts dissolved in it.

River and lake water also contain inorganic particles that simply float on the water. Water exists on Earth within a large energy circle. The sun moves water, evaporating it from the seas and oceans, into the air. In the air, water vapor collects into clouds and falls out as rain, fog, snow or dew, and returns back to the sea.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Which animal survived on three ships that sank in World War II?

During World War II, German sailors carried a cat aboard the battleship Bismarck. The battleship was scuttled by the British squadron 9 days after going to sea, only 115 of the 2200 crew members were saved. The cat was picked up by English sailors and taken on board the destroyer "Cossack", which after 5 months was torpedoed by a German submarine and sank. Subsequently, the cat, nicknamed Unsinkable Sam, was transferred to the aircraft carrier Ark Royal, which also sank. Only after that they decided to leave Sam on the shore, and he himself lived until 1955.

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