Riya Singh Banita Sathpathy Period 1 depth psychology of a Commercial discolor Purpose The purpose of this experimentation is to take root the amount of atomic number 11 hypochlorite in commercialized bleach by reacting the bleach with atomic number 11 thiosulfate. Procedure In this experiment a solution of sodium thiosulfate of known concentration willing be added to the bleach utilise a buret in a titration procedure. The disappearance of the sin 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 washstand stop that for every mole of sodium thiosulfate we need half 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 observational Sources of Error Pre-Lab Questions Titration is the process, operation, or method of determining the concentration of a substance in soluti on by adding to it a specimen reagent of k! nown concentration in carefully measured amounts until a reaction of definite and known proportion is completed, as shown by a color change or by ball over measurement, and then calculating the unknown concentration.If you want to get a full essay, order it on our website:
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