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 by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter15: Equilibria Of Other Reaction Classes
Section: Chapter Questions
Problem 79E: In a titration of cyanide ion, 28.72 mL of 0.0100 M AgNO3 is added before precipitation begins. [The...
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