Answered: Write the two pertinent balanced…

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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Iron content in a sample can be determined through titration with KMnO4. All the iron content is completely converted to iron (II) by dissolution in hydrochloric acid and treatment with tin (Il) chloride. The titrant was standardized using a 0.2565g of Na2C204 and used 36. 1 mL of the KMnO4 solution to reach the end point. [Hint: Na2C2O4 is oxidized to CO2 and KMnO4 was reduced to manganese (II).] During titration, MnO4 is converted to manganese (Il) and iron (II) is converted to iron (III) and a 6.235g iron ore sample required 17.4mL of titrant to reach endpoint. (AW: Fe=55.85; Na=23; C=12, O=16, K=39, Mn=54.9) All of these reactions occurred in an acidic medium. 1. Write the two pertinent balanced reactions (standardization and sample analysis) 2. Calculate the concentration of the titrant. 3. Calculate the %(w/w) of Fe in the sample.

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