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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Question
A 100.0-mL sample of spring water was treated to convert any iron present to Fe2+.
Titration with 35.00-mLof 0.002345 M K2Cr2O7 resulted in the reaction
6Fe2+ + Cr2O7
2- + 14H+ 6Fe3+ 1 2Cr3+ + 7H2O
The excess K2Cr2O7 was back-titrated with 8.32 mL of 0.00897 M Fe2+ solution.
Calculate the concentration of iron in the sample in parts per million.
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