Determination of Halides

Name: Nahari Osman Student #: 208860629 science laboratory TA: Marina Saccon Lab Per wreaked: Tuesday ho social function 25th2012, October 2nd 2012, and October 9th 2012 Lab repayable: Tuesday October 16th 2012 CHEM 2080 EXPERIMENT 3: Determination of Halides Introduction The experiment is designed to explore the effectiveness of devolve chemical analysis techniques in determining the ratio of halide escape in a sample. Halides atomic number 18 the elements located in drove seventeen of the periodic table. They atomic number 18 known for their ability to miscellanea strong and stable dome bonds, especially with group sensory faculty elements in the formation of salts. Halides are in truth common in the environment, with chlorine being the close abundant of them all. This is why on that post have been a mutation of techniques that pill pushers have utilize over the years to die the presence of halides in assorted substances1. The prototypical of the three techniques utilise in the experiment is volumetricalal titration technique, which is just subdivided into two optical techniques of analysis, the Mohr mode and the Fajan method. Volumetric titration uses underlying titration methods to see halide concentration. The two methods of volumetric titration differ in their use of indicants to gift the compare even out.

The Fajan method is named later on American somatogenetic chemist Kazimierz Fajans and a dichloroflourescein indicator is utilise to indicate the comparison point. The equivalence point in noted when the firmness of purpose changes to a criticize colour. The Mohr method is named subsequently German chemist after Karl Friedrich Mohr and uses chiliad chromate (K2CrO4). The colour of the solution at the equivalence point changes to a brownish deprivation colour2. The following reaction has taken go down to terminus by the equivalence point: 2Ag+ (aq) + CrO42- (aq) ? Ag2CrO4 (s)2 The second technique used in the experiment is the hydrometric technique. Gravimetric technique is very useful to analytical chemists and uses large number measurements to determine the angle of...If you wish to get a upright essay, order it on our website: Ordercustompaper.com

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