Dictionary, Defintion, Meaning, What is Anti isomorphism, Antimonyl Derivatives, Anthraquinone glycosides, Anthocyanine, Antibiotics, Anti-foaming Agents

Scholarships Dictionary Visa Details Study Abroad Exam Results Online Test Jobs

	Home
Dictionary of Chemistry Dictionary of Chemistry - Part 1 Part 2 ASS Atomic Absorption Spectroscopy - ABS Plastics Accumulator - Acetophenone Acetyl Coenzyme A - Acid base Indicator Acidic Dissociation Constant - Actinium Compounds Activated Molecule - Acyloin Condensation Adenosine Monophosphate - Aerosol,Aerogel Albumin (Albumen) - Aldosterone Alkaline Earth Metals - Alkanes (Paraffins) Alkynes (Acetylenes) - Allotropy(Allotrope) Aluminates - Aluminium Alkoxides Aluminium Silicates - Alums Amine Oxides - Amino Acids Aminoplastie Resins - Ammonium Carbonate Ammonium Phosphates - Amphoteric Amyl ether - Andrews Titration Angstrom - Anode Mud Anti isomorphism - Antimonyl Derivatives Apatite - Arndt Eistert Synthesis Arrhenius Equation - Ascorbic Acid, Vitamin Asphaltic Bitumen - Atactic Polymers

Home >> Chemistry Dictionary >>Anti isomorphism - Antimonyl Derivatives

Your Ad Here	Anthraquinone glycosides. Present in madder, used as dyestuffs (alizarin). The most important is ruberythric acid Anthocyanine. The universal soluble violet, blue or red, pigment of flowers, leaves and fruits Antibiotics. Any organic substance which is obtained by microorganism and is capable of low concentration of inhabiting the growth of or destroying another micro-organism Antichior. A substance used to remove chlorine from materials after bleaching sodium thio-sulphate. Na₂S₂O₃.
Anti-foaming agents. Substances which prevent the formation of foams. They are strongly absorbed by the liquid medium but they do not have the electrical or mechanical properties required to form a foam. Examples of anti-foaming agents are polyamides which are used in boilerfeed water and octanol used in electroplating baths and in paper making. Low concentrations of silicones also find quite general use. For lubricating oils polysiloxanes are widely used: Anti-isomorphism. Having the same crystal lattice but with the relative positions of anions and cations interchanged e.g., ThO₂ and Li₂O (with CaF₂ structure)
Antiknock. A substance that helps to control the burning rate of gasoline. The most widely used substance for this purpose are tetra ethyl lead (CH₃CH₂)₄ Pb, and tetra methyl lead, (CH₃)₄ Pb. The premium gesolines contain 2 or 3 ml of one these lead compounds per gallon with a resultant increase of 10 to 15 in octane rating Antimony Sb. At. No 51, at. Wt. 121.75, m.p. 630.74^°C, b.p. 175^0/C, d-6-68. Main source is stibnite, Sb₂S₂. Extracted by reduction with Fe or C. The most stable form of the element has a metallic appearance. White or bluish white in colour. This form has a layer structure with three near neighbours and there at a greater distance. Sb will burn in air but is unattacked by water or dilute acids, it is attacked by oxidizing acids and by halogens. Sb is widely used in alloys (e.g., type-metal) its use in semi-conductors is important. Antimony compound are mainly used in flame-proofing, paints, ceramics, enamels, galss, pottery, rubber technology and dyestuffs	Your Ad Here
Antimony bromides Antimony tribromide SbBr₃(Br₂ + Sb) m.p. 97^°C, b.p. 280^°C, similar to SbCI₃. Higher bromide are not known although complexes, M₂SbBr₆ (contains Sb, (iii) and Sb (V) and MsbBr₆. Antimone fluorides. Antimony trifluoride, SbF₃, m.p. 292^°C, sublimes 319^°C (sb₂ O₃ in HF solution). Forms complex ions, e.g. [SbF₄]. It is mainly used as a mild fluorinating agent Antimony, Hydride or stibine (SbH₃). An unstable colourless gas m.p. 88^°C b.p. 17^°C. IT decomposes easily to antimony
Your Ad Here	Antimony iodide. SbI₃. Red or yellow solid m.p. 17^°C similar in properties to SbCI₃. Antimony penta sulphide. (Sb₂S₅).A yellow insoluble powder. It is used in the vulcanization of rubber and as a pigment. Antimoney potassium tartrate. Or Tartar Emetic. KsBO (C₄H₄O₄) 1/2H₂O. A white soluble poisonous powder. It is used as an emetic and as a mordant. It is still injected in the treatment of kala-azar

Antimony silphates.
The normal salt, Sb₂ (SO₄)₃ (Sb₂O₂ + conc. H₂HO₄) is readily available. It is hydrolysed by water [Sb₂(SO₄)₃] white crystalline insoluable solid. It is used in explosives

Antimony sulphides.
The trisulphide, Sb₂S₃, occurs in a black or a red (H₂S + an Sb (III) compound in HCI) form. It is transparent to i.r. radiation. Forms thioantimonates (III) e.g. [SbS₃]³. with excess of sulphide ion. Antimony (V) sulphide is very unstable and readily loses sulphur on heating and may nor have a finite existence. Thioantimonates (V) M₃SbS₄(Sb₂S₃ plus S plus alkali) give Sb₂S₅ With acid

Antimonyl derivatives.
Compounds apparently containing the [SbO]⁺ grouping although in actual species present are much more complex.

Antiparticle.
An elementary particle with charge properties opposite to those normally found e.g., a positive electron

Antipyretics.
Drugs used to reduce the temperature in the case of fever e.g., salicylates

Antiseptics.
Mineral which stop the growth of micro-organisms, generally applied to living tissue. E.g., I₂.

	Home
Dictionary of Chemistry - Part 3 Part 4 Atomic Radius - Aufbau Principle Auger Effect - Azeotropic Mixtures Azimuthal Quantum Number - Babbit Metal Band Spectrum - Barometer Base Catalysed Reation - Backmann Thermometer Beneficiation (Ore Dressing) - Benzamide Benzidine Conversion - Benzoin Beryllate - Beta decay Bio Geneic Amines - Birkland Eyde Process Bitumen Emulsions - Blue Print Paper Bomb Calorimeter - Bordeaux Mixture Born Haber Cycle - Bornyl and Isobornyl Chlorides Boron Hydrides - Bredt's Rule Bromobenzens - Brown Ring Test Buchner Funel - Butanedioic Acid Cadmium Chemistry - Calcination Calcium Chloride - Calcium Phosphates Calorimeter - Carbanion Carbon Dating - Carbon Residue Carmine - Castner Kellner Cell

Language >> English | Français | Español | Deutsch | Italiano | Portugues | Japanese | Korean | Sim-Chinese