Why does distillation produce pure water and filtration does not

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Why does distillation produce pure water?

why does distillation produce pure water and filtration does not

Because distillation makes water vapour and leaves the impurities behind and in filtration some impurities come with water.


Distilled water is water that has been boiled into vapor and condensed back into liquid in a separate container. Impurities in the original water that do not boil below or near the boiling point of water remain in the original container. Thus, distilled water is one type of purified water. Drinking water has been distilled from sea water since at least about AD , when the process was clearly described by Alexander of Aphrodisias. In chemical and biological laboratories, as well as in industry, cheaper alternatives such as deionised water are preferred to distilled water. If exceptionally high-purity water is required, double distilled water is used. In general, non-purified water could cause or interfere with chemical reactions as well as leave mineral deposits after boiling away.

Distilled water is water that has been heated to the boiling point so that impurities are separated from the water, which itself becomes vapor or steam.
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Reverse osmosis, often referred to as RO, is an advanced water purification method that was initially developed by the U. Navy to produce drinking water from sea water for submarine crews. It is a membrane filtration technology that works by forcing water under pressure through the very tiny pores of a semi-permeable membrane. Modern reverse osmosis units for the home combine membrane technology with carbon and mechanical filtration to produce highly purified, great-tasting water. In modern home units water, driven by normal city water pressure, flows first through a carbon pre-filter, which removes organic contaminants including chlorine and its by-products. Next, it enters the reverse osmosis membrane, a very tight, sheet-like filter, that allows water to pass but rejects dissolved solids like sodium and impurities like lead and arsenic. Some of the water entering the unit is used to cleanse the membrane surface and flows to the the kitchen drain pipes.

Key concepts Physics Boiling point Condensation Distillation. Introduction Do you like cooking? If you have helped in the kitchen at home or watched someone else cook, you have probably seen lots of liquids—such as water, milk and soup—heated. Did you notice that once the liquid boils, a lot of steam develops? Have you ever wondered what the steam is made of and what happens to all the substances such as sugar or salt that are dissolved in the solution you are boiling? Do they boil off, too, or do they stay behind in the solution? In this activity you will build a distillation device that allows you to sample the steam that you generate while boiling a fruit juice!

Distilled vs. Purified Water

Distilled water vs. Looking for the best water delivery in the DC area and ready to schedule?


When most people think of chemistry, they think about joining substances together. Certainly, the bonding of elements to form compounds through chemical reactions is an integral component of the chemist's study; but chemists are also concerned with the separation of substances. Some forms of separation, in which compounds are returned to their elemental form, or in which atoms split off from molecules to yield a compound and a separated element, are complex phenomena that require chemical reactions. But chemists also use simpler physical methods, distillation and filtration, to separate mixtures. Distillation can be used to purify water, make alcohols, or separate petroleum into various components that range from natural gas to gasoline to tar. Filtration also makes possible the separation of gases or liquids from solids, and sewage treatment — a form of filtration — separates liquids, solids, and gases through a series of chemical and physical processes.

Not all liquids have the same boiling point. Sometimes, chemists are able to use those different volatility points in order to separate liquids during a process called distillation. You may have seen the process in action if you ever visited a distillery where alcoholic beverages are made, but there are also several other types of simple distillation mixtures used in everyday life. Simple distillation is used to separate salt from seawater, to separate sugar from water and to separate ethanol from water in the production of hard liquor. Simple distillation happens through a process of heating and cooling liquids in order to separate and purify them. First, a liquid is heated, producing a vapor. Then, that vapor is cooled in a small tube called a condenser, in order to form a separate liquid.

Call Today: Water that is treated by a water filter or purifier is similar to distilled water, but the main difference is in the filtration process. Distilled water is filtered by boiling water to separate the water molecules from contaminants and hard minerals. The pure water vapor is collected on one side of the water distiller and any other contaminants are left behind. A purification system uses various filters, reverse osmosis systems, and ion exchangers to block out impurities.

It is becaise filtration only seperates the large particles particles larger then the filter paper. Germs, virus and fine impurities will pass through the filter paper as they are much smaller then the holes in the filter paper.



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