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You find the following balanced reaction, it has not been completed but you notice a mistake, what mistake was made? Cr₂O7²- + H₂C₂O4 → Cr³+ + CO₂ Cr₂O72- + 14H → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ + 2e 9H₂C2O4 → 18CO2 + 18H+ + 18e- 2Cr₂O7²- + 18e +28H+ → 2Cr³+ + 14H₂O 2Cr2O7²- +9H₂C2O4 + 18e + 28H+ → 2Cr³+ + 14H₂O +18CO2 + 18H+ + 18e- O a. Electrons were not calculated correctly Ob. O or H-was not balanced correctly O c. Multiplication was not done correctly O d. Balancing was not done correctly O e. Nothing is wrong Cr₂O7²- + H₂C2O4 → Cr³+ + CO₂ Cr₂O7²- + 14H+ → Cr³+ + 7H₂O Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O 2Cr₂O7²- + 18e + 28H+→2Cr³+ + 14H₂O 2Cr2O72- +9H2C2O4 + 18e + 28H+→ 2Cr³+ + 14H₂O +18CO2 + 18H+ + 18e H₂C2O4 → 2CO₂ + 2H+ H₂C2O4 → 2CO₂ + 2H+ + 2e 9H₂C2O4 → 18CO2 + 18H+ + 18e-

You find the following balanced reaction, it has not been completed but you notice a mistake, what mistake was made? Cr₂O7²- + H₂C₂O4 → Cr³+ + CO₂ Cr₂O72- + 14H → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ + 2e 9H₂C2O4 → 18CO2 + 18H+ + 18e- 2Cr₂O7²- + 18e +28H+ → 2Cr³+ + 14H₂O 2Cr2O7²- +9H₂C2O4 + 18e + 28H+ → 2Cr³+ + 14H₂O +18CO2 + 18H+ + 18e- O a. Electrons were not calculated correctly Ob. O or H-was not balanced correctly O c. Multiplication was not done correctly O d. Balancing was not done correctly O e. Nothing is wrong Cr₂O7²- + H₂C2O4 → Cr³+ + CO₂ Cr₂O7²- + 14H+ → Cr³+ + 7H₂O Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O 2Cr₂O7²- + 18e + 28H+→2Cr³+ + 14H₂O 2Cr2O72- +9H2C2O4 + 18e + 28H+→ 2Cr³+ + 14H₂O +18CO2 + 18H+ + 18e H₂C2O4 → 2CO₂ + 2H+ H₂C2O4 → 2CO₂ + 2H+ + 2e 9H₂C2O4 → 18CO2 + 18H+ + 18e-

World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
3rd Edition
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter8: Reactions In Aqueous Solutions
Section: Chapter Questions
Problem 55A
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You find the following balanced reaction, it has not been completed but you notice a mistake, what mistake was made? Cr₂O7²- + H₂C2O4 → Cr³+ + CO2 Cr₂O7²- + 14H+ → Cr³+ + 7H₂O H2C2O4 → 2CO₂ + 2H+ Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ + 2e- 9H2C2O4 → 18CO2 + 18H+ + 18e- 2Cr₂O7²- + 18e +28H+ → 2Cr³+ + 14H₂O 2Cr2O7²- + 9H2C2O4 + 18e + 28H+ → 2Cr³+ + 14H₂O + 18CO₂ + 18H+ + 18e- O a. Electrons were not calculated correctly Ob. O or H- was not balanced correctly O c. Multiplication was not done correctly O d. Balancing was not done correctly O e. Nothing is wrong Cr2O7²- + H₂C2O4 → Cr³+ + CO₂ Cr₂O7²- + 14H+ → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O H₂C2O4 → 2CO2 + 2H+ + 2e 2Cr₂O7²- + 18e + 28H+→ 2Cr³+ + 14H₂O 9H2C2O4 → 18CO2 + 18H+ + 18e- 2Cr2O72- + 9H2C2O4 + 18e + 28H+ → 2Cr³+ + 14H₂O + 18CO₂ + 18H+ + 18e-
Transcribed Image Text:You find the following balanced reaction, it has not been completed but you notice a mistake, what mistake was made? Cr₂O7²- + H₂C2O4 → Cr³+ + CO2 Cr₂O7²- + 14H+ → Cr³+ + 7H₂O H2C2O4 → 2CO₂ + 2H+ Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ + 2e- 9H2C2O4 → 18CO2 + 18H+ + 18e- 2Cr₂O7²- + 18e +28H+ → 2Cr³+ + 14H₂O 2Cr2O7²- + 9H2C2O4 + 18e + 28H+ → 2Cr³+ + 14H₂O + 18CO₂ + 18H+ + 18e- O a. Electrons were not calculated correctly Ob. O or H- was not balanced correctly O c. Multiplication was not done correctly O d. Balancing was not done correctly O e. Nothing is wrong Cr2O7²- + H₂C2O4 → Cr³+ + CO₂ Cr₂O7²- + 14H+ → Cr³+ + 7H₂O H₂C2O4 → 2CO₂ + 2H+ Cr₂O7²- + 14H+ + 9e → Cr³+ + 7H₂O H₂C2O4 → 2CO2 + 2H+ + 2e 2Cr₂O7²- + 18e + 28H+→ 2Cr³+ + 14H₂O 9H2C2O4 → 18CO2 + 18H+ + 18e- 2Cr2O72- + 9H2C2O4 + 18e + 28H+ → 2Cr³+ + 14H₂O + 18CO₂ + 18H+ + 18e-
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