what is aliquot in chemistry?
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Aliquot of a sample, in chemistry or the other sciences, an exact portion of a sample or total amount of a liquid (e.g. exactly 25mL of water) Aliquot in pharmaceutics, a method of measuring ingredients below the sensitivity of a scale by proportional dilution with inactive known ingredients.
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Note: The milliequivalent (mEq) is the unit of measure often used for electrolytes. It indicates the chemical activity, or combining power, of an element relative to the activity of 1 mg of hydrogen. Thus, 1 mEq is represented by 1 mg of hydrogen (1 mole) or 23 mg of Na+, 39 mg of K+, etc.
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Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass.
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In chemistry, valence electrons are the electrons that are located in the outermost electron shell of an element.
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In chemistry, the valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules.
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A chelate is a chemical compound composed of a metal ion and a chelating agent. A chelating agent is a substance whose molecules can form several bonds to a single metal ion. In other words, a chelating agent is a multidentate ligand. An example of a simple chelating agent is ethylenediamine. ethylenediamine.
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Alkaline copper quaternary, usually abbreviated ACQ, is a type of water-based wood preservative product containing a soluble copper(II) complex and quaternary ammonium alkyl- or aryl-substituted compounds ("quats"). Thus the product was originally called ammoniacal copper/quaternary ammonium.
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Mercury (element) Mercury, also called quicksilver, is a chemical element in the periodic table that has the symbol Hg and atomic number 80. A heavy, silvery, transition metal, mercury is one of five elements that are liquid at or near room temperature.
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Aqueous (aq) means “in (a water) solution”, while liquid (l) describes a state of matter, when used in chemical equations.
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It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For example, a solution of table salt, or sodium chloride (NaCl), in water would be represented as Na+(aq) + Cl−(aq). The word aqueous (which comes from aqua) means pertaining to, related to, similar to, or dissolved in, water.
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Hydrogen is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. With an atomic weight of 1. 00794, hydrogen is the lightest element. Besides the common H1 isotope, hydrogen exists as the stable isotope Deuterium and the unstable, radioactive isotope Tritium.
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['Synonym: ATA, Aluminon, Ammonium aurintricarboxylate.', 'Linear Formula: C22H14O9 · 3NH3 Molecular Weight: 473.43. CAS Number: 569-58-4.']
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In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
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Barium(2+) is a barium cation, a divalent metal cation and a monoatomic dication. It has a role as a cofactor.
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The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties.
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noun Chemistry. an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom.
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A molecule is composed of two or more elements that are covalently bonded. A formula unit indicates the lowest whole number ratio of ions in an ionic compound.