Determination of Halides

Name: Nahari Osman Student #: 208860629 Lab TA: Marina Saccon Lab Per wreaked: Tuesday sept 25th2012, October 2nd 2012, and October 9th 2012 Lab Due: Tuesday October 16th 2012 CHEM 2080 EXPERIMENT 3: Determination of Halides Introduction The sample is designed to explore the forcefulness of lead chemical analysis techniques in determining the dimension of halide leave in a sample. Halides are the elements located in host seventeen of the periodic table. They are known for their faculty to form strong and stable ionic bonds, especially with conclave maven elements in the formation of salts. Halides are very reciprocal in the environment, with chlorine being the most abundant of them all. This is wherefore there fetch been a variety of techniques that pill pushers have used over the years to analyze the presence of halides in various substances1. The prototypical of the three techniques used in the try out is volumetric titration technique, w hich is just subdivided into two visual techniques of analysis, the Mohr method and the Fajan method. volumetrical titration uses rudimentary titration methods to see halide concentration. The two methods of volumetric titration differ in their use of indicators to gift the compare point.

The Fajan method is named after American physical apothecary Kazimierz Fajans and a dichloroflourescein indicator is used to fate the comparability point. The comparison point in noted when the antecedent changes to a criticize colour. The Mohr method is named after German chemist after Karl Friedrich Mohr and uses chiliad chromate (K2CrO4). The colour of the soluti! on at the equivalence point changes to a brownish red colour2. The following reply has taken go down to completion by the equivalence point: 2Ag+ (aq) + CrO42- (aq) ? Ag2CrO4 (s)2 The second technique used in the experiment is the gravimetric technique. Gravimetric technique is very useful to analytic chemists and uses mass measurements to determine the angle of...If you want to get a full essay, order it on our website: BestEssayCheap.com

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