What is the % of Cr in a sample of chrome-iron ore if 0.200 g of the ore after oxidation with Na2O2 and treatment of the acidified solution with 5.0 mmol of ferrous sulfate requires 0.166 mmol of dichromate for the x’ss Fe(II)? What is the % of Cr in a sample of chrome-iron ore if 0.200 g of the ore after oxidationwith Na2O2 and treatment of the acidified solution with 5.0 mmol of ferrous sulfate requires0.166 mmol of dichromate for the x'ss Fe(ll)?

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What is the % of Cr in a sample of chrome-iron ore

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter13: Titrations In Analytical Chemistry

Section: Chapter Questions

Problem 13.27QAP

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Question

What is the % of Cr in a sample of chrome-iron ore if 0.200 g of the ore after oxidation with Na₂O₂ and treatment of the acidified solution with 5.0 mmol of ferrous sulfate requires 0.166 mmol of dichromate for the x’ss Fe(II)?

What is the % of Cr in a sample of chrome-iron ore if 0.200 g of the ore after oxidation
with Na2O2 and treatment of the acidified solution with 5.0 mmol of ferrous sulfate requires
0.166 mmol of dichromate for the x'ss Fe(ll)?

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