Dictionary, Defintion, Meaning, What is Charless Law, Chemical Equivalent, Chalcocite, Chalcogens, Chalk, Chapasite, Charcoal

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Home >> Chemistry Dictionary >> Charless Law Chemical Equivalent

Your Ad Here	Chalcocite. A sulphide mineral Cu₂ colour lead grey or black. It is an ore of copper. Chalcogens. The elements oxygen, sulphur, selenium, tellurium, polonium of Group VI. Chalcogenides contain te X₂- species. Chalk. A naturally occuring from of CaCO₃ of marine origin. Chapasite. A naturally 300 litre calcium aluminium silicate.
Charcoal. A porous from of carbon produced by the destructive distillation of organic material. Charcoal from wood is used as a fuel. All forms of charcoal are porous and are used for absorbing gases and purifying and clarifying liquids. There are several types depending on the source. Charcoal from coconut shells is a particularly good gas absorbent. Animal charcoal (or bone black) is made by heating bones and dissolving out the calcium phosphates and other mineral salts with acid. It is used in sugar refining. Activated charcoal is charcoal that has been activated for absorption by steaming or by heating in a vacuum.
Charles’ law. At constant pressure the volume of given mass of gas is directly proportional to he absolute temperature. Cheddite. A class of high explosives having sodium or potassium chlorate with dinitrotoluene and other organic substances. Chelation. The formation of closed ring of atoms by the attachment of compounds or radical to a central polyvalent metal ions, e.g., two molecules of ethylendiamine, (NH₂CH₂.CH₂NH₂) from a chelate ring with a cupric ion as shown below:
Chemical bond. The strong force which keeps the atoms in any molecule together. Chemical energy. The part of the energy stored within an atom or molecule that can be released by a chemical reaction. Chemical equation. A way of representation of a chemical reaction in terms of symbol and formulae of various substance involved in the reaction: for example, xA + yB --> zC + wD
Your Ad Here	The single arrow is used for an irreversible reaction; double arrows are used for reversible reactions. When reactions involve different phases it is usual to put the phase in brackets after the symbol (s=solid; l=liquid; g=gas; aq=aqueous). The numbers x,y,z and w, showing the relative numbers of molecules reacting, are called the stoichiometric coefficients. The sum of the coefficients of the reactants minus the sum of the coefficients of the products (y +y –z –w in the example) is the stoichiometric sum. If this is zero equation is balanced. Sometimes a generalized chemical equation is considered.

₁A
In this case the reaction can be written ∑v_iA_f = 0 wher5e the convention is that stoichiometric coefficients are positive for reactants and negative for products. The stoichiometric sum is ?vi.
Chemical equivalent.
The weight of substances which will combine with or displace 8 parts by weight of oxygen. May be related to weights of other elements (e.g. 35.5g Cl. 1 g H) In redox reactions expressed as the number of gram equivalent to a Faraday (1 mole electrons).
Chemical fossil.
The term used for any of various organic compounds found in ancient geological strata that appear to be biological in origin are assumed to indicate that life existed when the rocks were formed.
Chemical property.
A property which describes the way in which substances acts when heated, electrolysed or added to other substances so that a chemical change takes place.
Chemical warfare.
Material used or usable in chemical warfare include toxic chemicals, flame, incendiaries smokes and defoliating agent.
Chemistry.
May be defined as the study of the elements and the compounds they form chemistry is mainly concerned with effects that depend on the outer electrons in atoms.
Chile Salt petre.
See Sodium Nitrate.

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