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Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
The word 'alchemy' itself derives from the Arabic word al-kīmiyāʾ (الكيمياء), wherein al-is the definite article 'the'. The ultimate origin of the word is uncertain, [1] but the Arabic term kīmiyāʾ (كيمياء) is likely derived from either the Ancient Greek word khēmeia (χημεία) or the similar khēmia (χημία). [2] [3]
The following outline acts as an overview of and topical guide to chemistry: . Chemistry is the science of atomic matter (matter that is composed of chemical elements), especially its chemical reactions, but also including its properties, structure, composition, behavior, and changes as they relate to the chemical reactions.
Colors of a single chemical in different solvents, under visible and UV light, showing how the chemical interacts dynamically with its solvent environmentIn addition to the generic definition offered above, there are several niche fields where the term "chemical substance" may take alternate usages that are widely accepted, some of which are outlined in the sections below.
Chemical nomenclature, replete as it is with compounds with very complex names, is a repository for some names that may be considered unusual. A browse through the Physical Constants of Organic Compounds in the CRC Handbook of Chemistry and Physics (a fundamental resource) will reveal not just the whimsical work of chemists, but the sometimes peculiar compound names that occur as the ...
As a noun, this word refers to an organ or layer of cells in human/animal bodies. It secretes a particular substance (e.g., hormones, sweat, tears, digestive juices, etc.).
The English word indigo is from Spanish indico and Dutch indigo (from Portuguese endego), from Latin indigo, from Greek ἰνδικόν (indikon): "blue dye from India". Tin (Sn) 50 tin: Anglo-Saxon via Middle English: The word tin is borrowed from a Proto-Indo-European language, and has cognates in several Germanic and Celtic languages. [38]