Chemistry on distilled water issue, what is distilled water

This is the knowledge of the university. Let's put it simply, see if you can understand it.

A substance requires energy to change from a liquid state to a gaseous state, and the liquid can only boil into a gaseous state when the liquid gathers enough energy. The energy required for the moment when the liquid begins to become gaseous exceeds the energy required for the subsequent liquid to become a gas (when the temperature exceeds the boiling point), that is, the energy required for a liquid to begin to become gaseous exceeds the energy required for normal boiling. Once the initial liquid boils and turns into gas, it releases the excess energy that exceeds the normal boiling, which is manifested as boiling.

Liquid boiling is prone to safety accidents.

When there is already gas in the liquid, the liquid does not need extra energy to boil to become gas. In this way, there will be no boiling.

Zeolite is porous, and there is gas in its pores, so adding zeolite can prevent the explosion from happening. Broken porcelain pieces can play the role of zeolite.

Use broken porcelain pieces as zeolite to form a vaporization center, so that the steam is produced evenly, if there is no vaporization center, the steam is not easy to form in the water, it is easy to overheat, and it will burst. It should be the principle of chemical engineering, inside.

The steam is generated with an upward thrust that pushes the tile upwards for a distance, and the gravity of the tile can cancel out part of the thrust. When the amount of steam is high, the porcelain tiles will beat all the time and hear the sound of "dingding". Personally, I think this "ding" sound is more important, because the absence of this sound means that the water is boiled dry and it is time to add water.

Of course, if the intelligent distillation machine does not need porcelain tiles, there is a sensor to measure the air pressure and temperature, the air pressure is greatly reduced, and the power is directly cut off when the temperature is high.

Distilled water is composed of a substance and is pure; Distilled water is made fromHydrogenand oxygen elements, which are pure compounds.

Long-term consumption of distilled water will have the following health and dust safety hazards:

1. Distilled water is water obtained by heating to evaporation and gasification, and water vapor is condensed, which is relatively pure sanitary water, and is often used to prepare pharmaceutical agents and chemical reagents, but it is not suitable for drinking water.

2. After distilled water is heated and boiled for a long time, part of the nitrate in the water will become nitrite.

Nitrite causes hemoglobin in the blood.

Degeneration, which lowers blood pressure and, in severe cases, blood shedding.

3. Distilled water loses a lot of minerals needed by the human body during the distillation process, and if you drink a large amount of distilled water for a long time, it will cause chest tightness.

Nausea, diarrhea, physical decline, irritability and other symptoms are harmful to human health.

4. Distilled water does not have the mineral elements magnesium, sodium and calcium required by the human body, which is not good for the human body, and long-term drinking will lead to inorganic salts in the human body.

Loss. 5. Distilled water is an active absorbing medium, and when it comes into contact with air, it will absorb carbon dioxide.

Makes the water sour. The more distilled water you drink, the more acidification your body will be.

Distilled water refers to the water that has been distilled and condensed by Paixun, and the second distillation is called re-distilled water, and the third distillation is called three-distilled water. Water with low oxygen consumption, potassium permanganate added.

Industrial distilled water with acid is obtained using the distilled water method. The entry details the concept of distillation, distilled water, multiple distilled water, and the standard, production method, advantages, and uses of distilled water; It was also compared with deionized water, high-purity water and ultrapure water.

Distillation is a thermodynamic separation process, which uses the different boiling points of each component in the mixed liquid or liquid-solid system to evaporate the low boiling point components and then condense to separate the whole component. Compared with other separation methods, such as extraction, filtration crystallization, etc., it has the advantage that no solvents other than the system components are used, thus ensuring that no new impurities are introduced.

Distilled water is not a chemical compound. Distilled water is referred to as H2O, which is a kind of specially treated water, boiling water until evaporation, and then condensing water vapor ** into distilled water. The purpose of distilled water is to remove impurities such as salts, organic matter, and microorganisms from the water to obtain purer water.

Overview of compoundsA compound is a pure substance (as distinguished from an elemental) consisting of two or more different elements. A compound has certain properties, both from the elements or ions it contains, and from other compounds, and often with a certain composition.

Compounds that are in their molecular states are called molecular compounds, such as water, sugar, etc. Compounds are called ionic compounds by ionic binders, such as table salt, miscanthus nitrate, etc. Compounds can be expressed by chemical formulas, which are composed of the symbols of the elements contained in a compound.

For example, when writing the chemical formula of a binary compound composed of two elements, it is like the English name, with the metal element written first, and the less metallic second. For example, the chemical formula of table salt (sodium chloride) is NaCl. When the number of atoms between different modifiers in a compound is unequal, the ratio can be written under the symbol and expressed as a number.

Distilled water is not a chemical compound.

Distilled water has the chemical formula H2O, which is a specially treated water that is boiled until it evaporates, and then condenses the water vapor.

**into distilled water. The purpose of distilled water is to remove impurities such as salt, organic matter, and microorganisms from the water to obtain purer water.

Overview of compounds.

A compound is a pure substance composed of two or more different elements.

distinct from elemental). A compound has certain properties, which are different from the elements or ions it contains, as well as from other compounds, and usually have a certain composition.

Compounds that are in their molecular states are called molecular compounds, such as water, sugar, etc. Compounds are called ionic compounds by ionic binders.

Such as table salt, miscanthus salt.

Wait. A compound can be expressed by a chemical formula, which is made up of the symbols of the elements contained in the compound.

For example, a binary compound composed of two elements, when its chemical formula is written, is like its English name, a metal element.

Written first, and less metallic second. Such as table salt (sodium chloride.

The chemical formula is NaCl. When the number of atoms between different elements in a compound is unequal, the ratio can be represented by a number under the symbol.

The above content reference: Encyclopedia - Compounds.

Distilled water is a very pure water. It is a means of evaporation and condensation of substances with low boiling point in water to achieve the purpose of separating purer water, and distilled water can be divided into primary distilled water and multiple distilled water, which is often used in chemical experiments and medical operations, in addition to distilled water will also be used in work related to machines and electrical appliances.

Distilled water refers to the water processed by the thermodynamic separation process of "distillation", which can not use other solvents, but only use the characteristics of different substances with different boiling points to evaporate and condense the substances with low boiling points in the water, so as to achieve the effect of separating them.

Distilled water can be divided into primary distilled water and multiple distilled water, most of the primary distilled water also contains carbon dioxide, organic matter and other substances, while multiple distilled water can remove organic matter, carbon dioxide and other substances in the water with the help of potassium permanganate solution and other substances, it is also more pure.

Use. 1.In life, when it is generally related to machines and electrical appliances, the main role of distilled water is that it does not conduct electricity, ensures the stable operation of the machine, and prolongs the service life of electrical appliances.

2.In the pharmaceutical industry, the action of distilled water is due to hypotonic action. Rinse the surgical wound with distilled water to make the tumor cells that may remain in the wound absorb water and swell, rupture, necrosis, and lose their activity, so as to avoid the growth of tumors in the wound.

3.Some chemistry experiments in schools require the use of distilled water, which has no electrolytes, no free ions, or no impurities. You need to analyze the specific problem on a case-by-case basis to see if it is due to its non-conductive properties, or hypotonic effect, or if there are no other ions and no chemical reactions.

Distilled water (zhēng liú shuǐ ) refers to pure water prepared by the method of distillation.

Distilled water can be divided into single and multiple times. After a distillation of water, the non-volatile components remain in the container and are removed, and the volatile components enter the initial fraction of the distilled water, usually only the middle part of the fraction is collected, accounting for about 60%. To obtain purer water, alkaline potassium permanganate solution can be added to primary distilled water to remove organic matter and carbon dioxide; Non-volatile acids are added to make ammonia a non-volatile ammonium salt.

Since glass contains a small amount of water-soluble components, it is necessary to use quartz distillation vessels to obtain very pure water when performing secondary or multiple distillations, and the resulting pure water should be stored in quartz or silver containers.

The water obtained by heating into water vapor and then cooling is called distilled water, divided into primary distilled water, secondary distilled water, tertiary distilled water, etc., mainly because the impurities that do not volatilize in the water are not removed.

When the water is boiled, the steam that comes out is collected to make distilled water.

It is the water produced by the condensation of water vapor.

Chemically distilled water is water [H2O], and distilled water in life mainly refers to the water left in the pot when steaming steamed buns. Some refer to the water that is cooled after the water has evaporated.

Purified water that does not contain impurities and is characterized by non-conductivity.

Distilled water refers to pure water prepared by the distillation method.

Collects water formed by water vapor when water is boiled.

Why use distilled water in the conditions of rust of iron products.

In order to show that water has a direct impact on corrosion, so the water is relatively pure, if you use tap water or river water, it contains more impurities, and it will also affect the rust of iron products.

Why use distilled water when preparing the solution.

Of course, there are requirements for preparing the solution, for example, if you want to configure a silver nitrate solution, then there can be no other substances except silver nitrate and water, distilled water is a kind of water with high purity, which is generally sufficient. Of course, if you configure a solution with higher requirements, you need water with higher purity, and the purity from high to low is ultrapure water, two-stage reverse osmosis water, double-distilled water, pure water (Ro water next to the chain), and distilled water. Ultrapure water is the purest water available.

Why should distilled water be added to the battery during use?

The electrolyte of the battery is made of sulfuric acid and distilled water in proportion, and the heat generated during the use of the battery will evaporate part of the water in the cavity, resulting in the imbalance of the electrolyte ratio, and even the concentration of sulfuric acid becomes larger to form corrosion. If you replenish ordinary water, the impurities contained in it will be deposited in the electrodes, causing insufficient or even impossible charging, so distilled water must be used.

Why should distilled water be used in nucleic acid protocols?

One of the quality standards for distilled water is that the salt content is generally around 1 5mg l. Because the salt content of the water decreases and the resistivity of the water increases, the purity of the water can be measured by measuring the resistivity of the water. The resistivity of distilled water is required to be around the euro·cm).

Distilled water is distilled for the second time to obtain re-distilled water, which is more pure.

Why do you need distilled water in the iron nail rust test?

Because distilled water can be seen as almost no oxygen, it prevents oxygen interference.