(a) What is the percentage of MnO, in a pyrolusite ore if a sample weighing 0.4000 g is treated witha 0.6000 g of pure H2C2O4.2H20 and dilute H,SO4 and after reduction has taken place(MnO2 + H2C204 + 2H* → Mn2+ + 2CO, + 2H,O), the excess oxalic acid requires 26.26 mL of0.1000 N KMnO4 for titration? (b) If pure As,03 were used instead of oxalic acid, how many gramswould be required in order for the other numerical data to remain the same?

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(a) What is the percentage of MnO2 in a pyrolusite ore if a sample weighing 0.4000 g is treated with a 0.6000 g of pure H,C,O4.2H2O and dilute H,SO4 and after reduction has taken place (MnO2 + H2C204 + 2H* → Mn2+ + 2CO2 + 2H,O), the excess oxalic acid requires 26.26 mL of 0.1000 N KMnO4 for titration? (b) If pure As,O, were used instead of oxalic acid, how many grams would be required in order for the other numerical data to remain the same?

(a) What is the percentage of MnO2 in a pyrolusite ore if a sample weighing 0.4000 g is treated with a 0.6000 g of pure H,C,O4.2H2O and dilute H,SO4 and after reduction has taken place (MnO2 + H2C204 + 2H* → Mn2+ + 2CO2 + 2H,O), the excess oxalic acid requires 26.26 mL of 0.1000 N KMnO4 for titration? (b) If pure As,O, were used instead of oxalic acid, how many grams would be required in order for the other numerical data to remain the same?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter20: Chemistry Of Selected Transition Elements And Coordination Compounds

Section: Chapter Questions

Problem 90QRT

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