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Determination of Hydrogen Peroxide The aqueous solution of potassium permanganate, KMnO4 is a popular oxidant for redox reactions because it is a strong oxidizing agent and titration with KMnO4 does not require the addition of an indicator solution. It acts as a self-indicator. In acidic medium, the purple permanganate ion changes to the almost colorless Mn²+ ion (pale pink ion). 1. Write the reduction half reaction of MnO4 in acidic medium. 2. Aside from pure iron metal, the solution of KMnO4 is can also standardized using any one of the primary standards Na2C2O4, H₂C2O4 2H₂O, KHC₂O4 H₂O, KHC2O4 H₂C₂O4-2H₂O (commonly referred to as potassium tetroxalate). Write the oxidation half reaction of oxalate ion, C₂O4, in acidic medium (exists as H₂C₂O4) 3. Write the balanced reduction half-reaction and indicate the standard reduction potential when a. hydrogen peroxide is reduced to water b. O2(g) is reduced to hydrogen peroxide Standardization of a KMnO4 Solution A 0.2028 g sample of primary standard grade Na₂C₂O4 (M.M. = 134.00) was dissolved in 100 mL of 1 M H₂SO4. The solution required 22.42 mL of the KMnO4 solution to reach the phenolphthalein end point. Titration of the blank (100 mL of 1M H₂SO4) required 0.02 mL of the KMnO4 solution. 4. Calculate the number of mmoles of Na₂C₂04. 5. Calculate the molarity of the KMnO4 solution.

Determination of Hydrogen Peroxide The aqueous solution of potassium permanganate, KMnO4 is a popular oxidant for redox reactions because it is a strong oxidizing agent and titration with KMnO4 does not require the addition of an indicator solution. It acts as a self-indicator. In acidic medium, the purple permanganate ion changes to the almost colorless Mn²+ ion (pale pink ion). 1. Write the reduction half reaction of MnO4 in acidic medium. 2. Aside from pure iron metal, the solution of KMnO4 is can also standardized using any one of the primary standards Na2C2O4, H₂C2O4 2H₂O, KHC₂O4 H₂O, KHC2O4 H₂C₂O4-2H₂O (commonly referred to as potassium tetroxalate). Write the oxidation half reaction of oxalate ion, C₂O4, in acidic medium (exists as H₂C₂O4) 3. Write the balanced reduction half-reaction and indicate the standard reduction potential when a. hydrogen peroxide is reduced to water b. O2(g) is reduced to hydrogen peroxide Standardization of a KMnO4 Solution A 0.2028 g sample of primary standard grade Na₂C₂O4 (M.M. = 134.00) was dissolved in 100 mL of 1 M H₂SO4. The solution required 22.42 mL of the KMnO4 solution to reach the phenolphthalein end point. Titration of the blank (100 mL of 1M H₂SO4) required 0.02 mL of the KMnO4 solution. 4. Calculate the number of mmoles of Na₂C₂04. 5. Calculate the molarity of the KMnO4 solution.

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter19: Electrochemistry
Section: Chapter Questions
Problem 19.100QP: Some metals, such as thallium, can be oxidized to more than one oxidation state. Obtain the balanced...
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Determination of Hydrogen Peroxide The aqueous solution of potassium permanganate, KMnO4 is a popular oxidant for redox reactions because it is a strong oxidizing agent and titration with KMnO4 does not require the addition of an indicator solution. It acts as a self-indicator. In acidic medium, the purple permanganate ion changes to the almost colorless Mn²+ ion (pale pink ion). 1. Write the reduction half reaction of MnO4 in acidic medium. 2. Aside from pure iron metal, the solution of KMnO4 is can also standardized using any one of the primary standards Na2C2O4, H₂C2O4 2H2O, KHC2O4 H2O, KHC2O4 H₂C2O4 2H₂O (commonly referred to as potassium tetroxalate). Write the oxidation half reaction of oxalate ion, C₂042, in acidic medium (exists as H₂C₂O4) 3. Write the balanced reduction half-reaction and indicate the standard reduction potential when a. hydrogen peroxide is reduced to water b. O₂(g) is reduced to hydrogen peroxide Standardization of a KMnO4 Solution A 0.2028 g sample of primary standard grade Na2C₂O4 (M.M. = 134.00) was dissolved in 100 mL of 1 M H₂SO4. The solution required 22.42 mL of the KMnO4 solution to reach the phenolphthalein end point. Titration of the blank (100 mL of 1M H₂SO4) required 0.02 mL of the KMnO4 solution. 4. Calculate the number of mmoles of Na2C2O4. 5. Calculate the molarity of the KMnO4 solution.
Transcribed Image Text:Determination of Hydrogen Peroxide The aqueous solution of potassium permanganate, KMnO4 is a popular oxidant for redox reactions because it is a strong oxidizing agent and titration with KMnO4 does not require the addition of an indicator solution. It acts as a self-indicator. In acidic medium, the purple permanganate ion changes to the almost colorless Mn²+ ion (pale pink ion). 1. Write the reduction half reaction of MnO4 in acidic medium. 2. Aside from pure iron metal, the solution of KMnO4 is can also standardized using any one of the primary standards Na2C2O4, H₂C2O4 2H2O, KHC2O4 H2O, KHC2O4 H₂C2O4 2H₂O (commonly referred to as potassium tetroxalate). Write the oxidation half reaction of oxalate ion, C₂042, in acidic medium (exists as H₂C₂O4) 3. Write the balanced reduction half-reaction and indicate the standard reduction potential when a. hydrogen peroxide is reduced to water b. O₂(g) is reduced to hydrogen peroxide Standardization of a KMnO4 Solution A 0.2028 g sample of primary standard grade Na2C₂O4 (M.M. = 134.00) was dissolved in 100 mL of 1 M H₂SO4. The solution required 22.42 mL of the KMnO4 solution to reach the phenolphthalein end point. Titration of the blank (100 mL of 1M H₂SO4) required 0.02 mL of the KMnO4 solution. 4. Calculate the number of mmoles of Na2C2O4. 5. Calculate the molarity of the KMnO4 solution.
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