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2. A sample consists of a mixture of Fe(NO3)2 (s) and Fe(NO3)3 (s) in unknown proportion. A total of 3.65 g of the mixture was dissolved in phosphoric acid solution and titrated with 0.135 M KMnO4. A total of 11.79 mL of the KMnO4 solution was required to reach the end-point of the titration. Note: as per the reaction equation in question 1, above, KMnO4 reacts only with Fe(NO3)2 in the mixture: the KMnO4 will not react with Fe(NO3)3. What was the % by mass of Fe(NO3)2 in the solid mixture?

2. A sample consists of a mixture of Fe(NO3)2 (s) and Fe(NO3)3 (s) in unknown proportion. A total of 3.65 g of the mixture was dissolved in phosphoric acid solution and titrated with 0.135 M KMnO4. A total of 11.79 mL of the KMnO4 solution was required to reach the end-point of the titration. Note: as per the reaction equation in question 1, above, KMnO4 reacts only with Fe(NO3)2 in the mixture: the KMnO4 will not react with Fe(NO3)3. What was the % by mass of Fe(NO3)2 in the solid mixture?

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter4: Stoichiometry Of Chemical Reactions
Section: Chapter Questions
Problem 91E: A sample of solid calcium hydroxide, Ca(OH)2, is allowed to stand in water until a saturated...
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2. A sample consists of a mixture of Fe(NO3)2 (s) and Fe(NO3)3 (s) in unknown proportion. A total of 3.65 g of the mixture was dissolved in phosphoric acid solution and titrated with 0.135 M KMnO4. A total of 11.79 mL of the KMnO4 solution was required to reach the end-point of the titration. Note: as per the reaction equation in question 1, above, KMnO4 reacts only with Fe(NO3)2 in the mixture: the KMnO4 will not react with Fe(NO3)3. What was the % by mass of Fe(NO3)2 in the solid mixture?
Transcribed Image Text:2. A sample consists of a mixture of Fe(NO3)2 (s) and Fe(NO3)3 (s) in unknown proportion. A total of 3.65 g of the mixture was dissolved in phosphoric acid solution and titrated with 0.135 M KMnO4. A total of 11.79 mL of the KMnO4 solution was required to reach the end-point of the titration. Note: as per the reaction equation in question 1, above, KMnO4 reacts only with Fe(NO3)2 in the mixture: the KMnO4 will not react with Fe(NO3)3. What was the % by mass of Fe(NO3)2 in the solid mixture?
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