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The half-reaction occurring at the cathode in the balanced reaction shown below is 3MnO4- (aq) + 24H+ (aq) + 5Fe (s) →3Mn2+ (aq) + 5Fe3+ (aq) + 12H₂O (1) A) 2MnO4- (aq) + 12H+ (aq) + 6e- →2Mn2+ (aq) + 3H₂O (1) B) Fe (s) →Fe2+ (aq) + 2e- C) MnO4- (aq) + 8H+ (aq) + 5e- →Mn2+ (aq) + 4H₂O (1) D) Fe (s) →Fe3+ (aq) + 3e- E) Fe2+ (aq) →Fe3+ (aq) + e-

The half-reaction occurring at the cathode in the balanced reaction shown below is 3MnO4- (aq) + 24H+ (aq) + 5Fe (s) →3Mn2+ (aq) + 5Fe3+ (aq) + 12H₂O (1) A) 2MnO4- (aq) + 12H+ (aq) + 6e- →2Mn2+ (aq) + 3H₂O (1) B) Fe (s) →Fe2+ (aq) + 2e- C) MnO4- (aq) + 8H+ (aq) + 5e- →Mn2+ (aq) + 4H₂O (1) D) Fe (s) →Fe3+ (aq) + 3e- E) Fe2+ (aq) →Fe3+ (aq) + e-

Fundamentals Of Analytical Chemistry
Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter21: Potentiometry
Section: Chapter Questions
Problem 21.15QAP
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The half-reaction occurring at the cathode in the balanced reaction shown below is 3MnO4- (aq) + 24H+ (aq) + 5Fe (s) →3Mn2+ (aq) + 5Fe3+ (aq) + 12H₂O (1) A) 2MnO4- (aq) + 12H+ (aq) + 6e- →2Mn2+ (aq) + 3H₂O (1) B) Fe (s) →Fe2+ (aq) + 2e- C) MnO4- (aq) + 8H+ (aq) + 5e- →Mn2+ (aq) + 4H₂O (1) D) Fe (s) →Fe3+ (aq) + 3e- E) Fe2+ (aq) →Fe³+ (aq) + e- 7) The pressure of the atmosphere A) follows the reverse trend as temperature B) follows the same trend as temperature C) increases with altitude D) decreases with altitude E) stays the same 8) Which substance is the oxidizing agent in the following reaction? Fe2S3 + 12HNO3 →2Fe(NO3)3 + 3S+ 6NO2 + 6H₂O B) Fe2S3 A) NO2 C) HNO3 2 D) S
Transcribed Image Text:The half-reaction occurring at the cathode in the balanced reaction shown below is 3MnO4- (aq) + 24H+ (aq) + 5Fe (s) →3Mn2+ (aq) + 5Fe3+ (aq) + 12H₂O (1) A) 2MnO4- (aq) + 12H+ (aq) + 6e- →2Mn2+ (aq) + 3H₂O (1) B) Fe (s) →Fe2+ (aq) + 2e- C) MnO4- (aq) + 8H+ (aq) + 5e- →Mn2+ (aq) + 4H₂O (1) D) Fe (s) →Fe3+ (aq) + 3e- E) Fe2+ (aq) →Fe³+ (aq) + e- 7) The pressure of the atmosphere A) follows the reverse trend as temperature B) follows the same trend as temperature C) increases with altitude D) decreases with altitude E) stays the same 8) Which substance is the oxidizing agent in the following reaction? Fe2S3 + 12HNO3 →2Fe(NO3)3 + 3S+ 6NO2 + 6H₂O B) Fe2S3 A) NO2 C) HNO3 2 D) S
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