Distilled water is distilled and condensed water. The water steamed twice is called re-steamed water, and the water steamed three times is called triple steamed water. Potassium permanganate and acidic industrial distilled water are added to obtain water with low oxygen consumption.
One of the quality standards of distilled water is that the salt content is generally around1~ 5 mg/L. Because the salt content in water decreases and the resistivity of water increases, the purity of water can be measured by measuring the resistivity of water. The resistivity of distilled water should be 0. 1× 106ω? Cm (oh? Cm)。 Distilled water can be distilled twice to obtain heavy distilled water with higher purity.
Use:
1. In life, when it is generally related to machines and electrical appliances, the main function of distilled water is not to conduct electricity, to ensure the stable operation of machines and to prolong the service life of electrical appliances.
2. In pharmaceutical industry, the function of distilled water is due to the low permeability effect. Wash the surgical wound with distilled water, so that the tumor cells that may remain on the wound will swell, rupture and die and lose their activity, thus preventing the tumor from planting and growing on the wound.
3. Some chemical experiments in school need distilled water, which has no electrolyte, free ions and impurities. You need to analyze specific problems to see whether it is based on its non-conductivity, low permeability, or no other ions and no chemical reaction.
Making:
Natural water is impure, and usually contains various salts such as calcium, magnesium and iron, as well as organic matter, microorganisms, dissolved gases (such as carbon dioxide) and suspended solids. The nonvolatile components can be removed by distillation. Distillation, combined with the following measures, can obtain high-quality distilled water.
① Remove the initial fraction (about 20% of the raw water) because the volatile components are mainly concentrated in the initial fraction.
② Discharge the remaining part (about 20% of the raw water) because many nonvolatile components are concentrated in the remaining water.
(3) add some substances that are beneficial to distillation. For example, adding NaOH can make CO2 in water become nonvolatile, and adding KMnO4 can oxidize organic matter in water.
Question 2: Where can I buy distilled water? There are all large supermarkets (Watsons). Many e-commerce websites such as JD.COM, Tmall and Taobao also sell different brands of distilled water.
Distilled water is distilled and condensed water. The water steamed twice is called re-steamed water, and the water steamed three times is called triple steamed water. Potassium permanganate and acidic industrial distilled water are added to obtain water with low oxygen consumption.
One of the quality standards of distilled water is that the salt content is generally around1~ 5 mg/L. Because the salt content in water decreases and the resistivity of water increases, the purity of water can be measured by measuring the resistivity of water. The resistivity of distilled water should be 0. 1× 106ω? Cm (oh? Cm)。 Distilled water can be distilled twice to obtain heavy distilled water with higher purity.
Question 3: What is distilled water? Where can I buy it? Distilled water is pure water without any mineral elements and impurities.
1. In life, when it is generally related to machines and electrical appliances, the main function of distilled water is not to conduct electricity, to ensure the stable operation of machines and to prolong the service life of electrical appliances.
2. In pharmaceutical industry, the function of distilled water is due to the low permeability effect. Wash the surgical wound with distilled water, so that the tumor cells that may remain on the wound will swell, rupture and die and lose their activity, thus preventing the tumor from planting and growing on the wound.
Some chemical experiments in our school need distilled water, which has no electrolyte, free ions and impurities. You need to analyze specific problems to see whether it is based on its non-conductivity, low permeability, or no other ions and no chemical reaction. You can buy it at a motorcycle repair shop.
Question 4: Where can I buy distilled water in hospitals, supermarkets and chemical markets? If you are in a supermarket, you can look at Watson's distilled water.
Question 5: Where can I buy distilled water? Many needs can be bought at the local thermal power plant, which is very cheap.
Hope to adopt.
Question 6: Is there distilled water on the market? You can buy it at the car battery sales office. Very cheap. If you say it's from a nearby repair shop, it's very likely that the boss will give you a plastic bucket before you go.
Question 7: Where can I buy distilled water? Watsons distilled water in the supermarket is very good. This brand of water is very good.
Question 8: Where can I buy distilled water? . Because it's easy to make in the laboratory. . . Unless you are a school that orders in bulk. . You can go to the chemistry shop.