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Showing posts from October, 2011

Freon

Freon is a trademark of E.I. du Pont for a series of chlorinated and fluorinated hydrocartoons. The parent hydrocarbons are methane, CH 4 , and ethane C 2 H 6 ; a few Freons contain a bromine atom. Freon often use as AC refrigerant but this chemicals have been forbiden to use because it can depletion the ozone layer on the atmosphere. Freon is the synthetic refrigerant that can be build from several compostion of chemicals, several kind of freon as folows: Chloro Fluoro Carbon, known as CFC Hydro Chloro Fluoro Carbon, known as HCFC Hydro Fluoro Carbon, known as HFC The freons are chemically stable, nontoxic, and non flammable. Other useful properties are high density, low boiling point, and low viscosity. These characteristics make the freons especially suited for use as refrigerants. They have also been used as propellants in aerosol cans, as solvents, and to expand polyurethane insulating foams. Freons are fluorocarbons, the substances that have been implicated in the depletion o...

Chemical Glassware

If you work on laboratory you will familiar with glassware apparatus  that usually use as many tools in laboratory. Most of glassware that use for chemicals fluid have a size with volume indicator, even not all this glass apparatus will use for measure liquid volume. The different of this measuring ruler is the thoroughness. Glass use for volume measure will have more accuracy compare with glass that is not use to measure the volume.  The glass with smaller inlet section called as Erlenmeyer, this glass is not purposes to measure the liquid volume even though there is a measurement indicator on the glass wall. The chemical glass with the same inlet section with the bottom called as Chemical Glass, this glass is not use for volume measurement but just keep or storage the chemical inside with the volume prediction. The highest glass on the picture above called as measuring cylinder, this glass is used for volume measurement. Measuring cylinder is just use to measu...