Analysis Of Commercial Bleach

Riya Singh Banita Sathpathy Period 1 compendium of a Commercial blanch Purpose The purpose of this experimentation is to fall the amount of atomic number 11 hypochlorite in commercialized bleach by reacting the bleach with sodium thiosulfate. Procedure In this experiment a solution of sodium thiosulfate of known concentration exit be added to the bleach development a buret in a titration procedure. The disappearance of the iniquity blue color of the starch- iodine composite plant will signal the end point. Data running 1Trial 2Trial 3 initial Reading (ml)000 Final Reading (ml)35.736.036.6 Volume of Na2S2O335.7 ml36.0 ml36.6 ml Calculations and Analysis 2 S2O3-2 = I3- = I2 = ClO- Therefore looking at the equation above, we buns stop that for every mole of sodium thiosulfate we need half(prenominal) a mole of sodium hypochlorite. (35.7+36+36.6)/3=36.1 ml is the fair volume of the Na2S2O3. (0.0361)(0.1) = 0.00361 0 .00361/(2 ×2.5)=7.22 ×〖10〗^(-4) M NaClO 0.00481/(.005) = 0.96 M NaClO 0.358/5.4= 35.8 % |.358-0.060|= .298 |(0.358-0.06)/0.06|=4.

9% percent error Conclusion In the experiment a redox titration was performed in order to determine the percent of sodium hypochlorite in commercial bleach. This done by reacting the bleach and the sodium thiosulfate in the carriage of iodide ions and starch. Discussions of Theory experimental Sources of Error Pre-Lab Questions Titration is the process, operation, or method of determining the concentration of a substance in solution by addin g to it a master copy reagent of known con! centration in carefully measured amounts until a reaction of definite and known proportion is completed, as shown by a color change or by electrical measurement, and then calculating the unknown concentration.If you want to get a full essay, order it on our website: OrderCustomPaper.com

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