Question

3. A student followed the procedure of this experiment to determine the percent commercial bleaching solution that was found in the basement of an abandoned house. The student diluted 50.00 mL of the commercial bleaching solution to 250 mL in a volumetric flask, and titrated a 20-mL aliquot of the diluted bleaching solution. The titration required 35.46 mL of 0.1052M Na2S2O3 solution. A faded price label on the gallon bottle read $0.79. The density of the bleaching solution was 1.10 g/mL. Refer to the post laboratory assignment calculations for h-i. required for the titration. a) Calculate the number of moles of S2O, b) Calculate the number of moles of I2 produced in the titration mixture. Calculate the number of moles of OCI ion present in the diluted bleaching solution c) titrated. Calculate the mass of NaOCl present in the diluted bleaching solution titrated. d) e) Determine the volume of commercial bleaching solution present in the diluted bleaching solution titrated. f) Calculate the mass of commercial bleaching solution titrated. g) Determine the percent NaOCI in the commercial bleaching solution. h) Calculate the mass of one gallon of the commercial bleaching solution. i) Calculate the cost of 100 g of the commercial bleaching solution. j) Determine the cost of the amount of commercial bleaching solution required to supply 100 g of NaOCl

Please answer a-j since this is one question.

Answer 1

reaction involved t C10 + 24 +21 caq) (ar) can ct to t cad w caa) Sugz +25° Iran + 3892 moles of sus caa required 2 (mxular SO 0.1052m x 35-46ML XIBL veochan 2 moles Of I in = 0.003 730 moles produced a xmoles of Sg2- mixtue { x 0.003730 = 0.001865 moles. present a moes da produced - 2 0.00186J moles vedont moles of oct mass of Nood = moles naolt x molar mass NGOC 2 0.001865 x 74.449/mol 20-13.883069_ 0.1388 9 In 200ml Solution Jo.00 me commercial bleach. In 20ml solution - 7 ML Commerical bleach. me commer cal bleach Solution treated - 20 ml So.oome commerc alban Solution 250m slitched solution mass of commercial bleaching solution treated... 2 ml commercal becching Soon Fhrake d) x density 2 4.00 ml x Hog/ml 2 14-409]

+ NOO x 100 t. mass mass naoch of solation 0-1388 9064 * 100 4.40 g 3.167 Cranding at i 3.15527. = last) mass of z I gallon 1 gallon x 3785-412 ml x 1.109 I gallon 2 4163.95 g ~ 4160 g. 4160g bleach Cost $0.79 - Cl Solution gallon bottle) 100g bleach soluna - 2 Cost of loog a bleach solution 0.798 x 100g 41609 g) 20.01908 2 calculate amount to supply Loog 0.019 8. of wood Nooch solution. (mass- 100 g solution - gives 3.1559 Naoch a solution - gives loog Nagcel mass of soluna a loog naocl x 1004. 3-1557 2 3169.69 100g bleach Solution 0.0198 3 169.69 bleach solution - cost a Cost of 3169-69 beach solvent (to Proude loog naoci 28.6028-0.608 for for