2) Given the following unbalanced redox equation: Br + Cr₂0₂² →Cr+3+ Br₂ (in acid) In a redox titration 12.38 mL of 0.225 M Cr₂O₂²- was needed to completely oxidize the Br in a 20.00 mL sample of NaBr. Calculate the original [Br]. ans 0.835 mol/L 3) Acidified hydrogen peroxide (H₂O₂) is used to titrate a solution of MnO4 ions of unknown concentration. Two products are O₂ gas and Mn²+. Write the balanced redox equation: It takes 6.50 mL of 0.200 M H₂O₂ to titrate a 25.0 mL sample of MnO4 solution. Calculate the original [MnO4]. ans 0.021 mol/L
2) Given the following unbalanced redox equation: Br + Cr₂0₂² →Cr+3+ Br₂ (in acid) In a redox titration 12.38 mL of 0.225 M Cr₂O₂²- was needed to completely oxidize the Br in a 20.00 mL sample of NaBr. Calculate the original [Br]. ans 0.835 mol/L 3) Acidified hydrogen peroxide (H₂O₂) is used to titrate a solution of MnO4 ions of unknown concentration. Two products are O₂ gas and Mn²+. Write the balanced redox equation: It takes 6.50 mL of 0.200 M H₂O₂ to titrate a 25.0 mL sample of MnO4 solution. Calculate the original [MnO4]. ans 0.021 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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