Skip to main content

Posts

Physical and Nuclear Chemistry

Physical Chemistry deals with the structure of matter and the energy changes that occur during physical and chemical changes of matter. This field provides a theoretical basis for the chemical observations of the other subdivision of other subdivisions. Analytical chemistry is concerned with the identification of chemical substances, the determination of the amounts of substances present in a mixture, and the separation of mixture onto their individual components. Special subdivisions of chemistry are now recognized the account for knowledge at the interface of chemistry and other physical sciences. For example, recent research has involved the chemical origin of life, reactions between simple molecules at low pressures to form such complex organic molecules as proteins found in living organisms. Astrochemistry is the interdisciplinary physical science that studies the origin and interaction of the chemical constituents, especially interstellar matter, in the universe, Geochemistr

Basic Chemistry

Chemistry is the physical science that deals with composition, structure and properties of substance and also the transformation that these substance that undergoes. Because the study of chemistry encompasses the entire material universe, it is central to the understanding of other science. Basic chemistry involve in all aspect on live, the incident in around you actually is the basic chemistry process such as the changes of compost from fresh there is any chemical reaction involved there even the process itself is help by microorganism. A basic chemistry theory has been formulated as the result of centuries of observation and measurement of the various elements and compounds. According to this theory, matter is composed of minute particles called atoms. The more than 100 different kinds of atoms that are known are called chemical elements. Atoms of the same elements or of different elements can combine together to form molecules and compounds. The atom are held together by forces,

Sulfur

Sulfur or sulphur is a naturally occurring, yellow, water insoluble solid element. Its chemical symbol is S , its atomic number is 16 and its atomic weight is 32.064 sulfur is nonmetal and a member of the oxygen family of elements, which constitutes Group VIA of the periodic table. The discovery of sulfur predates recorded history, and the element has been used since ancient times. The early medical books of Dioscorides of Greece and Pliny the Elder mention sulfur, and fumes from burning sulfur were used in religious ceremonies and for fumigation. Alchemists recognized sulfur as a mineral substance that can be melted and burned. It was first classified as an element by Antonie Lavoisier in 1777. Sulfur Occurrence On earth, sulfur is widely distributed in its elemental state as a secondary mineral or as a volcanic deposit, as well as in combination with a number of metals. Large sedimentary deposits of the almost pure element, mainly of Tertiary age, are found in the coastal r

Acetylene

Acetylene or ethane, have formula C 2 H 2 , is a colorless and flammable gas. It sublimes at – 84 o C at normal pressure. Most acetylene is manufactured by the reaction of water with calcium carbide, the reaction as follows: CaC 2 + 2H 2 O >>>>> Ca (OH) 2 + C 2 H 2 This reaction also occurs in carbide lamps, where a steady gas flow in obtained from water dripping on a carbide tablet. Acetylene have triple bond on the structure formula: CH = CH. Because of this triple bond, acetylene easily undergoes addition reactions. Vinyl chloride is manufactured from acetylene by the addition of hydrogen chloride: CH == CH + HCl >>>>> CH 2 == CHCl Similar additions with acetic acid, CH3COOH, and with hydrogen cyanide, HCN, yield vinyl acetate. CH3COOH == CH 2 and acrylonitrile CH 2 == CHCN. Both compounds are important in the production of artificial fibers and plastics. Acetylene gas is used in metal cutting and welding because of its high combus

Acetone

Acetone have formula CH 3 COCH 3 or in science called as 2-propanone or dimethylketone. Acetone commonly use in a fragrant as a solution, colorless and flammable liquid that boils at 56.2 o C and solidifies at – 34.8 o C. A compound with solvent properties no color and with specific odor, that can make we fill dizzy if inhaled. Aceton is obtained by fermentation of produced synthetically. It is a by product when produce aceto acetic acid. In industry, acetone is an important solvent for cellulose nitrate and cellulose acetate and is also used in the production of explosives material. Small amounts of acetone are present in blood and urine, but some diabetic patients show larger than normal people. Diabetic evacuate this excess in urine (acetonuria) and through their lungs, in metabolic acidosis, pregnancy toxemia and acetonemia of numinants. Aceton can poisoning in companion animals causes narcosis, gastritis, renal and hepatic damage. Acetone is very useful in laboratory f