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1. Balance the following net reactions and identify the oxidizing agent and the reducing agent for each. a. Mnos + VO* → Mn²* + V(OH)a* b. HPO, + Mno. + OH → PO.* + MnO. 2. Calculate the potential of the copper electrode immersed in a. 0.0440 M Cu(NO;)½ b. 0.0750 M in NaCl and sat'd with CuCı 3. Titration of 0.1756 g primary standard Na:C:04 required 32.04 mL of a potassium permanganate solution. Calculate the molar concentration of KMNO, in this solution. 4. a. Calculate the E° for the process AglO3(s) + e¯ ++ Ag(s) + IO3 b. Use the shorthand notation to describe the cell consisting of a saturated calomel reference electrode and a silver indicator electrode that could be used to measure pl03. c. Develop an equation that relates the potential of the cell in (b) to plO3. d. Calculate plo, if the cell in (b) has a potential of 0.294V. 5. A 0.1278-g sample of primary standard Na:C;04 required exactly 60.04 mL of permanganate solution to reach the end point. What is the molarity of the KMNO4 reagent? 6. A 50.00 mL sample containing La* was added with sodium oxalate to precipitate La:(C¿O4)3, which was washed, dissolved in dilute H;SO4, and titrated with 18.09 mL of the standard KMNO4 solution (in #5). Calculate the molarity of La³* in the unknown sample. 7. The amount of hydrogen peroxide (H;O;) in a sample of hair bleach was determined by titration with a standard KMNO4 solution. What was the mass percent of hydrogen peroxide in hair bleach sample, if 27.6 g of hair bleach required 86.4 ml of 0.105M KMNO4 to reach the endpoint of titration?

1. Balance the following net reactions and identify the oxidizing agent and the reducing agent for each. a. Mnos + VO* → Mn²* + V(OH)a* b. HPO, + Mno. + OH → PO.* + MnO. 2. Calculate the potential of the copper electrode immersed in a. 0.0440 M Cu(NO;)½ b. 0.0750 M in NaCl and sat'd with CuCı 3. Titration of 0.1756 g primary standard Na:C:04 required 32.04 mL of a potassium permanganate solution. Calculate the molar concentration of KMNO, in this solution. 4. a. Calculate the E° for the process AglO3(s) + e¯ ++ Ag(s) + IO3 b. Use the shorthand notation to describe the cell consisting of a saturated calomel reference electrode and a silver indicator electrode that could be used to measure pl03. c. Develop an equation that relates the potential of the cell in (b) to plO3. d. Calculate plo, if the cell in (b) has a potential of 0.294V. 5. A 0.1278-g sample of primary standard Na:C;04 required exactly 60.04 mL of permanganate solution to reach the end point. What is the molarity of the KMNO4 reagent? 6. A 50.00 mL sample containing La* was added with sodium oxalate to precipitate La:(C¿O4)3, which was washed, dissolved in dilute H;SO4, and titrated with 18.09 mL of the standard KMNO4 solution (in #5). Calculate the molarity of La³* in the unknown sample. 7. The amount of hydrogen peroxide (H;O;) in a sample of hair bleach was determined by titration with a standard KMNO4 solution. What was the mass percent of hydrogen peroxide in hair bleach sample, if 27.6 g of hair bleach required 86.4 ml of 0.105M KMNO4 to reach the endpoint of titration?

Chemistry
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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1. Balance the following net reactions and identify the oxidizing agent and the reducing agent for each. a. Mnos + VO2* → Mn2* + V(OH)a* b. HPO, + MnO. + OH" > PO,* + MnO2 2. Calculate the potential of the copper electrode immersed in a. 0.0440 M Cu(NO3)2 b. 0.0750 M in NaCl and sať'd with CuCI 3. Titration of 0.1756 g primary standard Na:C204 required 32.04 ml of a potassium permanganate solution. Calculate the molar concentration of KMNO4 in this solution. 4. a. Calculate the E° for the process AglO:(s) + e+ Ag(s) + 103 b. Use the shorthand notation to describe the cell consisting of a saturated calomel reference electrode and a silver indicator electrode that could be used to measure pl03. c. Develop an equation that relates the potential of the cell in (b) to plO3. d. Calculate plo, if the cell in (b) has a potential of 0.294V. 5. A 0.1278-g sample of primary standard NazC204 required exactly 60.04 ml of permanganate solution to reach the end point. What is the molarity of the KMNO4 reagent? 6. A 50.00 ml sample containing La* was added with sodium oxalate to precipitate La:(C204)3, which was washed, dissolved in dilute H;SOs, and titrated with 18.09 mL of the standard KMNO4 solution (in #5). Calculate the molarity of La* in the unknown sample. 7. The amount of hydrogen peroxide (H,O2) in a sample of hair bleach was determined by titration with a standard KMNO4 solution. What was the mass percent of hydrogen peroxide in hair bleach sample, if 27.6 g of hair bleach required 86.4 ml of 0.105M KMNO4 to reach the endpoint of titration?
Transcribed Image Text:1. Balance the following net reactions and identify the oxidizing agent and the reducing agent for each. a. Mnos + VO2* → Mn2* + V(OH)a* b. HPO, + MnO. + OH" > PO,* + MnO2 2. Calculate the potential of the copper electrode immersed in a. 0.0440 M Cu(NO3)2 b. 0.0750 M in NaCl and sať'd with CuCI 3. Titration of 0.1756 g primary standard Na:C204 required 32.04 ml of a potassium permanganate solution. Calculate the molar concentration of KMNO4 in this solution. 4. a. Calculate the E° for the process AglO:(s) + e+ Ag(s) + 103 b. Use the shorthand notation to describe the cell consisting of a saturated calomel reference electrode and a silver indicator electrode that could be used to measure pl03. c. Develop an equation that relates the potential of the cell in (b) to plO3. d. Calculate plo, if the cell in (b) has a potential of 0.294V. 5. A 0.1278-g sample of primary standard NazC204 required exactly 60.04 ml of permanganate solution to reach the end point. What is the molarity of the KMNO4 reagent? 6. A 50.00 ml sample containing La* was added with sodium oxalate to precipitate La:(C204)3, which was washed, dissolved in dilute H;SOs, and titrated with 18.09 mL of the standard KMNO4 solution (in #5). Calculate the molarity of La* in the unknown sample. 7. The amount of hydrogen peroxide (H,O2) in a sample of hair bleach was determined by titration with a standard KMNO4 solution. What was the mass percent of hydrogen peroxide in hair bleach sample, if 27.6 g of hair bleach required 86.4 ml of 0.105M KMNO4 to reach the endpoint of titration?
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