Why you can't boil drinking water twice. Is it possible to boil water several times

How many copies are broken in recent times in an attempt to answer this simple question! Mutually exclusive arguments and substantiations of ecologists, chemists and other specialists baffle the common man in the street. Whom to believe? To boil or not to boil? Let's try to figure it out, relying only on logic and school knowledge.

Which water is healthier - raw or boiled?

I think the answer is obvious - raw! Life-giving moisture - this is how we respectfully address, and, of course, not boiled. It would never occur to anyone to water flowers on the windowsill with liquid that has passed the 100-degree mark or fill an aquarium with fish with it. Boiling destroys some trace elements necessary for the normal functioning of the body.

Spring, and even more so, tap water are not samples of purity. In addition to useful, they contain many harmful components.

The first thing that comes to mind is chlorine - it is customary for them to disinfect to eliminate microorganisms. This chemical element is a poison in itself. When combined with water, it becomes a source of carcinogenic substances that affect the kidneys, liver and nervous system. Add here aluminum, arsenic, pesticides, herbicides and a whole host of human waste products that fall into drinking water as a result of the natural cycle.

A relative solution is to install additional household filters, but even they do not completely solve the problem, only reducing the amount of unwanted “chemistry and biology”.

Logical conclusion: one water from the tap to satisfy the body's need for water modern man not able, if his own health is dear to him, of course. Not without boiling. Moreover, such drinks, which have become firmly established in our everyday life, like tea or coffee cold water you won't cook.

How exactly to boil?

How many times? Most experts believe that it is better to boil the same water only once, and pour out what remains in the kettle without a shadow of pity.

The most advanced argue that when re-boiling, the water “gets heavier” - the evaporated oxygen atoms are replaced by hydrogen isotopes, and the same chlorine, without completely disappearing, forms combinations dangerous to health with other elements of the periodic table. Naturally, having settled, all this muck settles at the bottom of the kettle, and when boiled again, it begins to show signs of life again, forming new compounds.

In addition, among many physicians and biologists there is an opinion that with the constant use of water that has passed the boiling point, the body's immune response decreases.

There are those who advise drinking only boiled liquid, but they are a clear minority.

Let's just summarize

our body is vital a certain amount of namely “living” water;
to fully satisfy the need for liquid, it is also necessary to use boiled water;
it is best not to bring it to a full boil - a significant change in volume leads to an increase in the content of chemicals;
moreover, it is not necessary to re-boil or “refuel” an already boiled liquid.

Observing two latest advice and periodically cleaning the kettle from salt scale, you can safely get reasonable doses of caffeine contained in invigorating drinks along with water!

Any zealous housewife knows that water intended for drinking can be boiled no more than once. However, the physicochemical mechanism of this prohibition can be explained only in the field of molecular physics and chemistry. Despite the preservation of the organoleptic characteristics of the liquid during boiling, its structure and composition of substances change. Why can't you boil water twice scientific fact confirmed by experiments. This phenomenon is caused by several reasons.

Physical and chemical characteristics of water

The structure of the water molecule is known from the school chemistry course. It consists of two hydrogen atoms connected to one oxygen atom. Chemical formula H2O water. The liquid is colorless, transparent, tasteless and odorless. Tap and natural water (river, lake, spring) contains a lot of dissolved mineral chemical impurities, most of which are harmful to the human body. In addition, natural water contains complex macromolecular organic compounds, microflora and microfauna.

Why you can't boil water twice is a scientific fact

The main purpose of boiling water is to destroy harmful and pathogenic microorganisms that die when the temperature of the liquid rises.

Without denying the correctness of all the scientific facts presented, a completely legitimate question arises - Why can't you drink distilled water? ? There are no prohibitions here, but it has been noticed that the distillate, which has neither taste nor smell, also negatively affects human health. Moreover, there is no consensus among scientists about the causes of this phenomenon. According to some scientists, in distilled water, which has passed the stage of steam and then re-condensed, the direction of the charge changes and the value of the dipole moment changes. To restore the original properties, some healers recommend distilled water, which has a high degree cleaning and from the point of view of chemistry absolutely harmless to humans, freeze. For drinking and cooking, it is recommended to use melted liquid.

What happens to all these substances during boiling water? Definitely, bacteria and viruses die at the first boil, so this is simply necessary to disinfect water. Especially if the water is taken from a dubious source - a river or a well.

salt heavy metals Unfortunately, they do not disappear from water, and when boiled, their concentration can only increase due to the fact that a certain volume of water evaporates. The greater the number of boilings, the higher the concentration of harmful salts. But, according to scientists, their number is still not enough to cause significant harm to the body at a time.

As for chlorine, during boiling it forms a lot of organochlorine compounds. And the longer the boiling process lasts, the more such compounds appear. These include carcinogens and dioxins that can have a negative effect on cells. human body. Scientists in the course of laboratory studies have found that such compounds appear even if the water was purified with inert gases before boiling. Of course, the harmful effect of such water will not be noticeable immediately, aggressive substances can accumulate in the body for quite some time. long time, and then lead to the development of serious diseases. To harm the body, you need to drink such water every day for several years.

According to the British Julie Harrison, who has extensive experience in researching the impact of lifestyle and nutrition on the occurrence of cancerous tumors, every time water is boiled, the content of nitrates, arsenic and sodium fluoride becomes higher. Nitrates are converted to carcinogenic nitrosamines, which in some cases cause leukemia, non-Hodgkin's lymphoma and other types of cancer. Arsenic can also cause cancer, heart disease, infertility, neurological problems and, of course, poisoning. Sodium fluoride adversely affects cardiovascular system, and in large doses can lead to sudden changes in blood pressure and dental fluorosis. Substances that are harmless in small quantities, for example, calcium salts, become dangerous when water is repeatedly boiled: they affect the kidneys, contribute to the formation of stones in them, and also provoke arthrosis and arthritis. Especially not recommended repeatedly boiled water for children, because high content in it, sodium fluoride can seriously harm their mental and neurological development.

Another fact in favor of the inadmissibility re-boiling- the formation of deuterium in water - heavy hydrogen, the density of which also increases. Ordinary water turns into "dead", constant use which is at risk of death.

However, scientists are of the opinion that the concentration of deuterium in water, even after several heat treatments, is negligible. According to the research of academician I.V. Petryanov-Sokolov, to obtain one liter of water with a lethal concentration of deuterium, you will have to boil more than two tons of liquid from the tap.

By the way, water boiled several times does not change its taste better side, so that tea or coffee made from it will not be what it should be!

russian7.ru

Can you re-boil water in a kettle?

You can boil water several times, but it is not necessary. The main factor in the benefits and purity of water is not the amount of boiling, but the degree of quality of the original liquid. Therefore, before use, it is important to purify the water with any existing way.

By the way, the use of bottled water is also not recommended, since there is no single standard and quality requirements for such products. Besides, plastic container content is negatively affected.

In everyday life, it is better to use standard tap water, but before use, clean it with filters or other available and effective methods. And in this article we will consider whether it is necessary and whether it is possible to boil water several times.

Harm of tap water

The water that we pour into the kettle from the tap contains both useful and harmful elements. On the one hand, it contains such important substances as calcium and magnesium, oxygen and carbon dioxide. On the other hand, the composition includes dangerous uranium and barium, bleach, fluorine and nitrates. Such components can cause serious harm and damage to human health.

Regular use of untreated tap water for a long period of time causes the formation of stones in gallbladder and kidneys, worsens the microflora in the intestines and the condition of the mucous membranes, contributes to the emergence and development of an allergic reaction.

Poor-quality tap water after cleaning with bleach has an unpleasant taste and worsens the taste of cooked dishes and drinks. Impurities in its composition will easily spoil the value of tea and coffee.

In addition, tap water is often hard, which degrades the quality of things after washing. It makes the material rough and unpleasant to the touch, leaves stains and stains on clothes. To eliminate such harm, you need to clean and soften the water.

Boiling to purify and soften water

The benefit of boiling is that it kills dangerous bacteria and makes the water softer. It is the lightest and affordable way home cleansing. If you boil water for 15 minutes along with steam, harmful chemical compounds. But along with these elements, the concentration of calcium and other beneficial minerals decreases. At the same time, chlorine and non-volatile substances remain in the composition. In boiled water, they turn into more dangerous carcinogens.

The longer and more you boil water, the more nutrients will go away, the more useless it will become. In addition, after boiling, salt deposits and stains remain on the walls of the dishes, and scale forms. At the same time, the level of dangerous pollutants in the water is low enough that it will not cause serious harm to health.

If you use Electric kettle, it turns off quickly, and the boiling time is short. Therefore, repeated and even repeated boiling will not become a harmful action. However, many experts still do not recommend repeating this procedure and consider it overkill. Let's see why you can't boil water twice.

Is it possible to boil water twice

Boiling water again is not recommended. With repeated and subsequent boiling, harmful elements turn into carcinogens that are dangerous to humans. This can lead to oncological and neurological diseases, problems in the functioning of the heart, loss of vascular elasticity, impaired development and growth of children.

Note that the danger lies not in the number of boils, but in the duration of the procedure. The longer the water boils, the more active production negative and harmful substances.

With prolonged and repeated boiling, the hydrogen isotope precipitates and deuterium is formed. It disrupts the material metabolism in the body and impairs the absorption of vitamins. This is a scientific fact that explains why you can't boil water twice.

In addition, boiled water acquires an unpleasant taste. And with each new boil, it gets worse. The reason for this process is that harmful impurities in the composition of water at a temperature of 100 degrees, they react and become active, as a result they give an unpleasant aftertaste.

Six Reasons Why You Shouldn't Reboil Water

After you have boiled water in a kettle, especially repeatedly, it first loses its taste and then acquires an unpleasant aftertaste;
When heated to 100 degrees, chlorine interacts with organic matter, which forms carcinogens that are harmful to the body and human health. Each subsequent boiling increases the concentration of the latter;
The more often it happens heat treatment, the more useful substances and properties the water loses. As a result, it becomes useless and “dead”;
When reheated, oxygen leaves, water evaporates, and the content of salts and impurities increases. Such water is no longer suitable for making broths and soups, tea and coffee, cooking pasta;
If after the first boil the water becomes softer, then after the second and subsequent it becomes heavier. This will lead to increased scale formation in the kettle or pan, deterioration in the quality of linen after washing, the taste of cooked food and drinks;
When water is boiled again in a kettle or other utensils, an isotope of hydrogen is precipitated, which is called toxic deuterium. Gradually, it accumulates, which is dangerous for human health.

How to purify tap water

To get high-quality, healthy and tasty water, it is enough to defend the contents before use. Half an hour is enough for harmful chlorine to disappear. Before boiling, it is better to stand for several hours so that harmful gases and compounds evaporate. If you are pouring the contents into a thermos, leave it open for a few minutes and only then close the lid.

It is healthier and safer to use new fresh water for each boil. Do not boil the liquid again and do not add fresh water to the water left after the previous boil. To make tea or coffee, boiled water can be slightly heated without bringing the liquid back to a boil. Don't do this in the microwave as it kills everything. useful elements.

To clean the water as much as possible, use special filters or products. For more information on how and how to purify tap water for drinking, see the link https://vsepodomu.ru/uborka/kak-ochistit-vodu-iz-pod-krana/#i-2.

vsepodomu.ru

What does repeated boiling with water do?

Doctors advise using only water that has been boiled once to make tea and coffee. That is, each time the kettle must be completely renewed, pouring out the remnants of the old liquid before adding a new one.

What is the prejudice about re-boiling? Why can't you boil water twice? It will have to affect not only the physical, but also Chemical properties precious moisture.

What happens to water when heated?

Without water, the human body cannot exist. Eighty percent of our body consists of liquid. Fresh water is necessary for normal metabolism, removal of toxins from the body.

But there are certain problems with water in the modern world. Not every resident of the metropolis can get required amount liquids from a well or from a natural source. In addition, we must not forget about natural pollution. modern world. Life-giving moisture enters our homes through miles of pipes. Naturally, disinfectants are added to it. For example, chlorine. If we talk about cleaning systems, then their quality leaves much to be desired. In some cities, they have not changed for decades.

Boiling was invented to use this water for cooking and drinking. There is only one reason - to destroy, if possible, all the bacteria and microbes that are in raw water. There is an anecdote on this topic:

The girl asks her mother:

Why are you boiling water? To kill all microbes.

Is it that I will drink tea with the corpses of microbes?

Indeed, most bacteria and microbes die under the influence of high temperatures. But what else happens to the composition of h3O when the temperature reaches 100 degrees Celsius?

1) Boiling evaporates oxygen and water molecules.

2) Any water contains certain impurities. At high temperatures they don't go anywhere. Is it possible to drink sea water if it is boiled? At 100°C, oxygen and water atoms will be removed, but all salts will remain. But the most interesting thing is that their concentration will increase, as the water itself has become less. That's why sea water after boiling it is unsuitable for drinking.

3) Hydrogen isotopes are present in water molecules. It's heavy chemical elements which are resistant to temperature rise up to 100°C. They settle to the bottom, "weighting" the liquid.

Is re-boiling dangerous?

Why do it? The bacteria died during the first boil. There is no need for re-heat treatment. Too lazy to change the contents of the teapot? Well, let's figure it out, is it possible to boil again?

1. Boiled water completely devoid of taste. If it is boiled several times, it becomes very, very tasteless. Some may object that raw water also has no taste. Not at all. Spend little experiment.

At regular intervals, drink tap water, filtered water, boiled once and boiled many times. All of these liquids will taste DIFFERENT. When you drink the last version (boiled many times), there will even be an unpleasant aftertaste in your mouth, some kind of metallic taste.

2. Boiling "kills" water. The more often the heat treatment occurs, the more useless the liquid is in the long run. Oxygen evaporates, in fact, the usual formula of H2O is violated from the point of view of chemistry. For this reason, the name of such a drink arose - "dead water".

3. As mentioned above, after boiling, all impurities and salts remain. What happens with each reheat? Oxygen leaves, water too. Consequently, the concentration of salts increases. Of course, the body does not immediately feel it.

The toxicity of such a drink is negligible. But in "heavy" water, all reactions occur more slowly. Deuterium (a substance that is released from hydrogen during boiling) tends to accumulate. And this is already harmful.

4. We usually boil chlorinated water. In the process of heating to 100 ° C, chlorine reacts with organic substances. As a result, carcinogens are formed. Frequent boiling increases their concentration. And these substances are extremely undesirable for humans, as they provoke cancer.

Boiled water is no longer useful. Re-processing makes it harmful. Therefore, observe the following simple rules:

for boiling each time pour fresh water;
do not boil the liquid again and do not add fresh water to its remains;
before boiling the water, let it stand for several hours;
pouring boiling water into a thermos (for cooking medicinal collection, for example), close it with a cork after a few minutes, not immediately.

Drink for health!

propochemu.ru

Why You Can't Boil Water Twice: A Scientific Fact

Any zealous housewife knows that water intended for drinking can be boiled no more than once. However, only specialists in the field of molecular physics and chemistry can explain the physicochemical mechanism of this prohibition. Despite the preservation of the organoleptic characteristics of the liquid during boiling, its structure and composition of substances change. Why you can not boil water twice, the scientific fact is confirmed by experiments. This phenomenon is caused by several reasons.

Physical and chemical characteristics of water

The structure of the water molecule is known from the school chemistry course. It consists of two hydrogen atoms connected to one oxygen atom. The chemical formula of water is H2O. The liquid is colorless, transparent, tasteless and odorless. Tap water and natural water (river, lake, spring) contain many dissolved mineral chemical impurities, most of which are harmful to the human body. In addition, natural water contains complex macromolecular organic compounds, microflora and microfauna.

Why you can't boil water twice is a scientific fact

The main purpose of boiling water is to destroy harmful and pathogenic microorganisms that die when the temperature of the liquid rises.

Without denying the correctness of all the scientific facts presented, a completely legitimate question arises - why can't you drink distilled water? There are no prohibitions here, but it has been noticed that the distillate, which has neither taste nor smell, also negatively affects human health. Moreover, there is no consensus among scientists about the causes of this phenomenon. According to some scientists, in distilled water, which has passed the stage of steam and then re-condensed, the direction of the charge changes and the value of the dipole moment changes. To restore the original properties, some healers recommend freezing distilled water, which has a high degree of purification and, from the point of view of chemistry, is absolutely harmless to humans. For drinking and cooking, it is recommended to use melted liquid.

At one time, the television charlatan Alan Vladimirovich Chumak restored the quality of water, who cleaned and charged the water in front of the viewers, without leaving the Ostankino studio. According to him, neither single nor double boiling was required after that. So why you can not boil water twice - the scientific fact explains quite clearly.

How sometimes it is reluctant to pour out the water left from the previous tea party from the kettle in order to boil a new portion for tea or coffee! And we just put it back on the burner or press the kettle button. Maximum - add water if there is not enough left. Everything is attributed to haste, employment. Especially in offices, where every minute counts and tea parties are almost on the run. But who among us has ever thought: is it not harmful to our health? Can water be boiled multiple times?

What lives in the water?

In order to understand what processes occur with water during boiling, especially when it is boiled again, you need to imagine what composition tap water can have. There are not so few possible "inhabitants" of the domestic aquatic environment:

Viruses, bacteria, capable of causing various infections. No cleaning and disinfection system can give a 100% guarantee of their complete destruction. Actually, because of them, water is most often boiled before drinking if there is no filter at home. By boiling the water, you can be sure that the harmful "living creatures" will be destroyed.
Chlorine, which are generously “flavored” with water for disinfection. Chlorine can cause irritation on the skin and mucous membranes (including the oral cavity), and in high concentrations it can contribute to the oncology.
Salts of magnesium and calcium. It is they who, settling on the walls of the teapot, gradually form the familiar lime scale- indicator of water hardness.
Heavy metals (zinc, strontium, lead). Under the influence of high temperature, they form carcinogenic substances, which, as you know, are also capable of provoking tumors.

And it's not full list. You can also add sodium salts, nitrogen compounds (nitrates), arsenic here ... How much and what substances are contained in a particular water supply depends on what composition the water had originally, how and with what it was cleaned and disinfected.

Don't pour a full kettle if you know you won't drink it all: it's tempting to just add a little more next time. It is not worth doing this: the already boiling water will not become more useful, and the new one will mix with it. It is better to drain it completely and boil a new one.

Boil Chemistry

What happens in a kettle with water when it is boiled again? Dangerous viruses and the bacteria die even at the first - the water is disinfected. It is no coincidence that small children are recommended to use boiled water, because it will not cause infections in the fragile intestines. But metal salts, unfortunately, do not go anywhere. Vice versa. Their concentration increases with each subsequent boiling, because the water evaporates, and its volume gradually decreases. In addition, these substances, when heated, interact with each other, forming various compounds. In particular compounds with chlorine. There are more of them, the more the same water is boiled.

Thus, dioxins and carcinogens are formed that are unsafe for the human body. Of course, for one tea party there will be no harm to health from them. But these substances are quite aggressive and tend to accumulate in the tissues of the body, causing serious diseases. If you use boiled water for several years, such consequences will be noticeable.

If you boil water several times, the concentration of other substances that can lead to the occurrence of various forms oncological tumors. Nitrates form nitrosamines - carcinogenic compounds that provoke cancer of the blood, lymph. Arsenic, in addition, can cause poisoning, neurological abnormalities, infertility, heart disease, sudden pressure surges, and dental disease.

Some substances found in tap water are not harmful in small doses. But as they accumulate, if the water is boiled repeatedly, they become dangerous. For example, calcium salts. Their high concentrations can affect the kidneys, provoke the deposition of stones in them, cause arthritis or arthrosis.

Sodium salts, in particular sodium fluoride, can seriously impair the mental development of children and cause neurological problems. Therefore, you can’t boil water for babies 2 times (or more!)

Be sure to descale the kettle. Substances that form it can even react with water that boils for the first time.

How to be?

Of course, in the absence of a filter, boiled water is much safer in terms of harm than just tap water. But boiling it a second, third time is definitely harmful, since the compounds resulting from chemical reactions that pass when heated, can accumulate in our body for years until they “shoot” with one or another disease.

Of course, if one day there was no time to change the water and the person drank “repeated” tea, nothing fatal will happen. But for the reasons stated above, this should not become a system. Yes, and the taste of such coffee or tea will be much worse: with bitterness, a metallic taste.

Therefore, it is better not to succumb to your own laziness, but to change the contents of the teapot completely before each tea party. And if the water is boiled in order to disinfect in the absence of a filter, it is prudent to first defend it for several hours in an open container so that the maximum chlorine vapor evaporates.

Laziness is not the best assistant in the matter of health care. We are reluctant to go in for sports, arrange jogging and even walks, cook for a long time (fortunately, semi-finished products are in every supermarket today - for every taste and budget) ... Let at least repeatedly boiled water not add problems. No wonder she is often called dead.

What is the prejudice about re-boiling? Why can't you boil water twice? We will have to touch not only the physical, but also the chemical properties of the precious moisture.

What happens to water when heated?

Without water, the human body cannot exist. Eighty percent of our body consists of liquid. Fresh water is necessary for normal metabolism, removal of toxins from the body.

But there are certain problems with water in the modern world. Not every resident of a metropolis can get the required amount of liquid from a well or from a natural source. In addition, we must not forget about the natural pollution of the modern world. Life-giving moisture enters our homes through miles of pipes. Naturally, disinfectants are added to it. For example, chlorine. If we talk about cleaning systems, then their quality leaves much to be desired. In some cities, they have not changed for decades.

The girl asks her mother:

Why are you boiling water?
To kill all microbes.
Is it that I will drink tea with the corpses of microbes?

Indeed, most bacteria and microbes die under the influence of high temperatures. But what else happens to the composition of H2O when the temperature reaches 100 degrees Celsius?

1) Boiling evaporates oxygen and water molecules.

2) Any water contains certain impurities. At high temperatures, they do not go anywhere. Can you drink sea water if you boil it? At 100°C, oxygen and water atoms will be removed, but all salts will remain. But the most interesting thing is that their concentration will increase, as the water itself has become less. Therefore, sea water after boiling is unsuitable for drinking.

3) Hydrogen isotopes are present in water molecules. These are heavy chemical elements that are resistant to temperatures up to 100°C. They settle to the bottom, "weighting" the liquid.

Is re-boiling dangerous?

Why do it? The bacteria died during the first boil. There is no need for re-heat treatment. Too lazy to change the contents of the teapot? Well, let's figure it out, is it possible to boil again?

1. Boiled water is completely devoid of taste.. If it is boiled several times, it becomes very, very tasteless. Some may argue that raw water also has no taste. Not at all. Do a little experiment.

Boiled water is no longer useful. Re-processing makes it harmful. Therefore, follow these simple rules:

for boiling each time pour fresh water;
do not boil the liquid again and do not add fresh water to its remains;
before boiling the water, let it stand for several hours;
after pouring boiling water into a thermos (for preparing a medicinal collection, for example), close it with a cork after a few minutes, not immediately.

Drink for health!