verb (used with object), pu·ri·fied, pu·ri·fy·ing. to make pure; free from anything that debases, pollutes, adulterates, or contaminates: to purify metals.

Word family (noun) purification purist purity ≠ impurity purifier (adjective) pure ≠ impure (verb) purify (adverb) purely.

purification noun [U] (NOT MIXED) the act of removing harmful substances from something: a water purification plant. an air purification system. SMART Vocabulary: related words and phrases. Cleaning generally.

verb (used with object), pu·ri·fied, pu·ri·fy·ing. to make pure; free from anything that debases, pollutes, adulterates, or contaminates: to purify metals. to free from foreign, extraneous, or objectionable elements: to purify a language. to free from guilt or evil.

Purification is the removal of impure elements from something. After purification, water is safe to drink. In some religions, purification is the removal of sin, which is another type of cleansing.

noun. a natural process of purifying, as the ability of a body of water to rid itself of pollutants.

Self- or natural purification refers to the ability of a stream or river (given enough time and distance) to purify itself. For example, when waste-water is discharged to a body of moving water, natural processes occur that will remove some forms of pollution from the water (see Figure 8.16).

There are twenty-five methods to purify water, divided into four categories: separation, filtration, chemicals, oxydation. There are five types of contaminants that are found in water: particulates, bacteria, minerals, chemicals, and pharmaceuticals.

Purification is the process of rendering something pure, i.e. clean of foreign elements and/or pollution, and may refer to: List of purification methods in chemistry. Water purification. Organisms used in water purification.

The purification procedure reduces the concentration of contaminants such as suspended particles, parasites, bacteria, algae, viruses, and fungi. Water purification takes place on scales from the large (e.g., for an entire city) to the small (e.g., for individual households).

Purification has a clean, refreshing scent. When diffused, this blend works to eliminate unwanted odors and keep your space smelling pure and fresh. Topical: Apply 2–4 drops directly to desired area.

Recrystallization is a technique used to purify solid compounds. Solids tend to be more soluble in hot liquids than in cold liquids. During recrystallization, an impure solid compound is dissolved in a hot liquid until the solution is saturated, and then the liquid is allowed to cool.

Crystallization is used in the chemistry laboratory as a purification technique for solids. An impure solid is completely dissolved in a minimal amount of hot, boiling solvent, and the hot solution is allowed to slowly cool. The crystallized solid is then filtered away from the impurities.

In metallurgy, refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.

Distillation is used to identify and purify organic compounds. In the process of purification, we separate a compound from another material by exploiting their boiling points. When different compounds in a mixture have different boiling points, the mixture separates into its component parts when it is distilled.

First, the mixture may contain some substance that should be isolated from the rest of the mixture: this process of isolating and thus removing substances considered to be contaminants is called purification.

Current methods for the purification of organic solvents include distillation and vacuum transfer from dehydrating/deoxygenating reagents such as sodium benzophenone ketyl, LiAlH4, NaK alloy, and CaH2.

The general methods of purification are: Sublimation. Crystallisation. Distillation.

Distillation

There are several methods of refining, or purifying, metals. These methods include: Distillation, which involves vaporizing the metal and then allowing it to solidify outside of the impurities. Liquation, which involves melting the metal, and allowing it to run out of the solid impurities.

The primary focal points of this lesson will be on some of the common methods and applications of purifying organic compounds, including sublimation, recrystallization, distillation, selective extraction, and chromatography.

Crystallization is a chemical solid liquid separation technique in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs. The solution is warmed in open container allowing the solvent to evaporate.

Purification of solid organic compounds • Purification of organic compounds is important because, organic compound made in the laboratory contains impurities. The common methods for purification are crystallisation, sublimation, distillation, chromatography, etc. 3.

Organic compound, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. The few carbon-containing compounds not classified as organic include carbides, carbonates, and cyanides.

Isolation of materials from solution based on their differential solubility in different liquids. (

Structures of unknown compounds can be determined by comparing physical properties, performing functional group tests, and checking melting points of derivatives against those of known compounds reported in the literature. Solubility properties and chemical reactivity become apparent during these qualitative tests.

Identifying Unknown Substances

1. Smell: Most chemists can identify solvents by their distinctive smells (though this is a pretty bad idea). ¹
2. Melting point: If you’ve got very pure crystals, you can use their melting point to figure out which of several possible chemicals you’ve got.

You can identify an unknown substance by measuring its density and comparing your result to a list of known densities. Density = mass/volume. Assume that you have to identify an unknown metal. You can determine the mass of the metal on a scale.