therefore necessary to periodically determine the purity of the peroxide solutions. This can be done via a redox titration as follows: • The density of a particular surgical grade hydrogen peroxide solution is 1.11g.cm'. • Exactly 10 ml of this solution was pipetted and quantitatively transferred, along with a sufficient amount of a dilute sulphuric acid solution, into a 250.00 mL volumetric flask and made up to the mark. • A 25.00 mL portion of this diluted solution is pipetted into a conical flask, and titrated with a 0.372 M KMNO4 solution. • The endpoint of the titration is determined when the colourless solution in the conical flask turns a persistent bright pink due to the presence of excess permanganate ions. • The average titration value is 26.20 mL of the KMNO, solution. The reaction stoichiometry is as follows: 2KMN0, (aq) + 3H,S0,(aq) + 5H202 (aq) 2MNSO, (aq) + K2S0,(aq) + 8H;0(f) + 50, (g) 1.1 Determine the percentage of the hydrogen peroxide in the solution sample.

therefore necessary to periodically determine the purity of the peroxide solutions. This can be done via a redox titration as follows: • The density of a particular surgical grade hydrogen peroxide solution is 1.11g.cm'. • Exactly 10 ml of this solution was pipetted and quantitatively transferred, along with a sufficient amount of a dilute sulphuric acid solution, into a 250.00 mL volumetric flask and made up to the mark. • A 25.00 mL portion of this diluted solution is pipetted into a conical flask, and titrated with a 0.372 M KMNO4 solution. • The endpoint of the titration is determined when the colourless solution in the conical flask turns a persistent bright pink due to the presence of excess permanganate ions. • The average titration value is 26.20 mL of the KMNO, solution. The reaction stoichiometry is as follows: 2KMN0, (aq) + 3H,S0,(aq) + 5H202 (aq) 2MNSO, (aq) + K2S0,(aq) + 8H;0(f) + 50, (g) 1.1 Determine the percentage of the hydrogen peroxide in the solution sample.

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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