a. A 0.3108-g sample of primary-standard-grade Na2 C2O4 was dissolved in H2SO4 and titrated with 31.78 mL of dilute KMNO4: 2Mn O4- + 5C204²- + 16H+ –→ 2MN²+ + 10CO2 (g) + 8H2O Calculate the molar concentration of the KMNO4 solution. Molar concentration = M b. The iron in a 0.6639-g ore sample was reduced quantitatively to the +2 state and then titrated with 26.60 mL of the KMNO4 solution from part (a). Calculate the percent Fe2 O3 in the sample. Percent Fe2 O3 = %

a. A 0.3108-g sample of primary-standard-grade Na2 C2O4 was dissolved in H2SO4 and titrated with 31.78 mL of dilute KMNO4: 2Mn O4- + 5C204²- + 16H+ –→ 2MN²+ + 10CO2 (g) + 8H2O Calculate the molar concentration of the KMNO4 solution. Molar concentration = M b. The iron in a 0.6639-g ore sample was reduced quantitatively to the +2 state and then titrated with 26.60 mL of the KMNO4 solution from part (a). Calculate the percent Fe2 O3 in the sample. Percent Fe2 O3 = %

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. A 0.3108-g sample of primary-standard-grade Na2 C204 was dissolved in H2 SO4 and titrated with 31.78 mL of dilute KMNO4:
2Mn O4 + 5C204²- + 16H+ →→ 2MN²+ + 10CO2(g) + 8H2O
Calculate the molar concentration of the KMNO4 solution.
Molar concentration
M
b. The iron in a 0.6639-g ore sample was reduced quantitatively to the +2 state and then titrated with 26.60 mL of the KMNO4 solution from part (a).
Calculate the percent Fe2 O3 in the sample.
Percent Fe2 O3

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