Potassium dichromate is used to titrate a sample containing an unknown percentage of iron (AW. 55.845 g/mol ). The sample is dissolved in H3PO4/H2SO4 mixture reduce all of the iron to Fe<* ions. The solution is then titrated with 0.01625 M K2Cr207, producing Fe* and Cr* ions in acidic solution. The titration requires 32.26 mL of K2Cr207 for 1.2765 g of the sample.
Potassium dichromate is used to titrate a sample containing an unknown percentage of iron (AW. 55.845 g/mol ). The sample is dissolved in H3PO4/H2SO4 mixture reduce all of the iron to Fe<* ions. The solution is then titrated with 0.01625 M K2Cr207, producing Fe* and Cr* ions in acidic solution. The titration requires 32.26 mL of K2Cr207 for 1.2765 g of the sample.
Chemistry
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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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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![Potassium dichromate is used to titrate a sample containing an unknown percentage of iron (AW. 55.845 g/mol ). The sample is dissolved in H3PO4/H2SO4 mixture to
reduce all of the iron to Fe2* ions. The solution is then titrated with 0.01625 M K2Cr207, producing Fes+
mL of K2Cr207 for 1.2765 g of the sample.
and Cro+ ions in acidic solution. The titration requires 32.26
6F22+ + Cr2072- + 14H* .
---> 6 Fe3+ + 2Cr3+
7H2O
+
Determine the percent iron in the sample.
13.76%
12.13%
15.48%
14.92%](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F34050825-eb96-4d77-818b-181f7a64a32d%2Fa6b1fa3d-34f1-4e5c-b570-f601d953bd75%2Fk0zkolh_processed.png&w=3840&q=75)
Transcribed Image Text:Potassium dichromate is used to titrate a sample containing an unknown percentage of iron (AW. 55.845 g/mol ). The sample is dissolved in H3PO4/H2SO4 mixture to
reduce all of the iron to Fe2* ions. The solution is then titrated with 0.01625 M K2Cr207, producing Fes+
mL of K2Cr207 for 1.2765 g of the sample.
and Cro+ ions in acidic solution. The titration requires 32.26
6F22+ + Cr2072- + 14H* .
---> 6 Fe3+ + 2Cr3+
7H2O
+
Determine the percent iron in the sample.
13.76%
12.13%
15.48%
14.92%
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