Sodium hypochlorite, NACIO, is the active ingredient in household bleach The concentration of the hypochlorite ion, CIO, can be determined in two stages. In the first stage, a potassium iodide solution which has been acidified, is added to a solution of the bleach and iodine was formed. ClO(aq)+H(aq) +I(aq) (aq) + Cl(aq) = H;O(D In the second stage, the iodine formed was titrated with sodiumn thiosulphate solution. S,O, (aq) +I(aq)21(aq) + SO6 (aq) 10.0 cm of a household bleach was diluted to 250cm in a standard flask, thereafter, 25 cm' of this solution was added to excess acidified potassium iodide solution. The solution wvas then titrated with 0.10 mol.L Sodium thiosulphate using an appropriate indicator. The volume of thiosulphate solution required to reach the end point of the titration was 20.5cm (a) Calculate the number of moles of Iodine which reacted in the titration (six decimal places only i.e., 0.000001) mol (b) Calculate the concentration, in mol/L, of Cl0 in the original household bleach (three decimal places only i.e., 0.001) mol/L

Sodium hypochlorite, NACIO, is the active ingredient in household bleach The concentration of the hypochlorite ion, CIO, can be determined in two stages. In the first stage, a potassium iodide solution which has been acidified, is added to a solution of the bleach and iodine was formed. ClO(aq)+H(aq) +I(aq) (aq) + Cl(aq) = H;O(D In the second stage, the iodine formed was titrated with sodiumn thiosulphate solution. S,O, (aq) +I(aq)21(aq) + SO6 (aq) 10.0 cm of a household bleach was diluted to 250cm in a standard flask, thereafter, 25 cm' of this solution was added to excess acidified potassium iodide solution. The solution wvas then titrated with 0.10 mol.L Sodium thiosulphate using an appropriate indicator. The volume of thiosulphate solution required to reach the end point of the titration was 20.5cm (a) Calculate the number of moles of Iodine which reacted in the titration (six decimal places only i.e., 0.000001) mol (b) Calculate the concentration, in mol/L, of Cl0 in the original household bleach (three decimal places only i.e., 0.001) mol/L

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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