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Sulfuric acid is a very strong acid that can act as an oxidizing agent at high concentrations (very low pH, or even negative pH values). Under standard conditions, sulfuric acid has a low reduction potential, SO4 (aq) + 4H+ (aq) +2e=SO₂(g) + 2H₂O(1), +0.20 V which means it cannot oxidize any of the halides F2, Cl₂, Br2, or I2. If the H+ ion concentration is increased, however, the driving force for the sulfuric acid reduction is also increased according to Le Châtelier's principle. Sulfuric acid cannot oxidize the fluoride or chloride anions, but it can oxidize bromide and iodide anions when there are enough H+ ions present. The standard reduction potentials of the halogens are as follows: F2 +2e Cl₂ +2e Br₂ +2e7 →2F™, →2C1, →2Br, I2 +2e → 2I™, The Nernst equation allows us to determine what nonstandard conditions allow the reaction to occur (have a positive E value). The Nernst equation relates a nonstandard potential, E, to the standard potential, E, and the reaction quotient, Q, by 0.0592 V E=E° 2.303 RT n.F log Q 72 where R = 8.314 J/(mol-K), T is the Kelvin temperature, n is the number of moles of electrons transferred in the reaction, and F= 96, 485 C/mol e. ▼ Part A In other words, what is Q when E= 0 at this temperature? 20 - At 69.0 °C, what is the maximum value of the reaction quotient, Q. needed to produce a non-negative E value for the reaction SO4 (aq) + 4H+ (aq) + 2Br (aq) = Br₂ (aq) + SO₂(g) + 2H₂O(1) *** 3 +2.87 V +1.36 V +1.07 V +0.54 V -logQ= E- MacBook Air P Pearson Copyright © 2023 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | year

Sulfuric acid is a very strong acid that can act as an oxidizing agent at high concentrations (very low pH, or even negative pH values). Under standard conditions, sulfuric acid has a low reduction potential, SO4 (aq) + 4H+ (aq) +2e=SO₂(g) + 2H₂O(1), +0.20 V which means it cannot oxidize any of the halides F2, Cl₂, Br2, or I2. If the H+ ion concentration is increased, however, the driving force for the sulfuric acid reduction is also increased according to Le Châtelier's principle. Sulfuric acid cannot oxidize the fluoride or chloride anions, but it can oxidize bromide and iodide anions when there are enough H+ ions present. The standard reduction potentials of the halogens are as follows: F2 +2e Cl₂ +2e Br₂ +2e7 →2F™, →2C1, →2Br, I2 +2e → 2I™, The Nernst equation allows us to determine what nonstandard conditions allow the reaction to occur (have a positive E value). The Nernst equation relates a nonstandard potential, E, to the standard potential, E, and the reaction quotient, Q, by 0.0592 V E=E° 2.303 RT n.F log Q 72 where R = 8.314 J/(mol-K), T is the Kelvin temperature, n is the number of moles of electrons transferred in the reaction, and F= 96, 485 C/mol e. ▼ Part A In other words, what is Q when E= 0 at this temperature? 20 - At 69.0 °C, what is the maximum value of the reaction quotient, Q. needed to produce a non-negative E value for the reaction SO4 (aq) + 4H+ (aq) + 2Br (aq) = Br₂ (aq) + SO₂(g) + 2H₂O(1) *** 3 +2.87 V +1.36 V +1.07 V +0.54 V -logQ= E- MacBook Air P Pearson Copyright © 2023 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | year

Chemistry
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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story Bookmarks Profiles X Course Home <Homework on Chap 20 Electrochemistry ± The Nernst Equation and pH 20 ge.com course html courselo=12765065&Openvellumt MAC lody 20056193644141032530763034419001 Tab Part A F3 Window 54 Sulfuric acid is a very strong acid that can act as an oxidizing agent at high concentrations (very low pH, or even negative pH values). Under standard conditions, sulfuric acid has a low reduction potential, R SO4 (aq) + 4H+ (aq) + 2e = SO₂(g) + 2H₂O(1), +0.20 V which means it cannot oxidize any of the halides F2. Cl2. Br2, or I₂. If the H ion concentration is increased, however, the driving force for the sulfuric acid reduction is also increased according to Le Châtelier's principle. Sulfuric acid cannot oxidize the fluoride or chloride anions, but it can oxidize bromide and iodide anions when there are enough H* ions present. The standard reduction potentials of the halogens are as follows: In other words, what is Q when E = 0 at this temperature? 000 000 F4 The Nernst equation allows us to determine what nonstandard conditions allow the reaction to occur (have a positive E value). The Nernst equation relates a nonstandard potential, E, to the standard potential, E, and the reaction quotient, Q, by E = E° - 2.303 log Q = E° nF where R = 8.314 J/(mol - K), T is the Kelvin temperature, n is the number of moles of electrons transferred in the reaction, and F = 96, 485 C/mol e X P Acceptable units % Help 5 At 69.0 °C, what is the maximum value of the reaction quotient, Q, needed to produce a non-negative E value for the reaction 2- SO4² (aq) + 4H+ (aq) + 2Br¯(aq) = Br₂ (aq) + SO₂(g) + 2H₂O(1) 13 D I T T F5 CA 6 1441 F2 +2e Cl₂ +2e Br₂ +2e I2 +2e MacBook Air Y x + | Copyright © 2023 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions Contact Us | F6 & 7 →2F 2F, →2C1, → 2Br¯, →21- U F7 7 P Pearson +2.87 V +1.36 V +1.07 V +0.54 V * 8 ►II US 0592 Vlog Q n F8 9 F9 F10 Ú✰ ✰ ☐ P Fri Apr 21 15 F11 9 of 12 + 11 F12 }
Transcribed Image Text:story Bookmarks Profiles X Course Home <Homework on Chap 20 Electrochemistry ± The Nernst Equation and pH 20 ge.com course html courselo=12765065&Openvellumt MAC lody 20056193644141032530763034419001 Tab Part A F3 Window 54 Sulfuric acid is a very strong acid that can act as an oxidizing agent at high concentrations (very low pH, or even negative pH values). Under standard conditions, sulfuric acid has a low reduction potential, R SO4 (aq) + 4H+ (aq) + 2e = SO₂(g) + 2H₂O(1), +0.20 V which means it cannot oxidize any of the halides F2. Cl2. Br2, or I₂. If the H ion concentration is increased, however, the driving force for the sulfuric acid reduction is also increased according to Le Châtelier's principle. Sulfuric acid cannot oxidize the fluoride or chloride anions, but it can oxidize bromide and iodide anions when there are enough H* ions present. The standard reduction potentials of the halogens are as follows: In other words, what is Q when E = 0 at this temperature? 000 000 F4 The Nernst equation allows us to determine what nonstandard conditions allow the reaction to occur (have a positive E value). The Nernst equation relates a nonstandard potential, E, to the standard potential, E, and the reaction quotient, Q, by E = E° - 2.303 log Q = E° nF where R = 8.314 J/(mol - K), T is the Kelvin temperature, n is the number of moles of electrons transferred in the reaction, and F = 96, 485 C/mol e X P Acceptable units % Help 5 At 69.0 °C, what is the maximum value of the reaction quotient, Q, needed to produce a non-negative E value for the reaction 2- SO4² (aq) + 4H+ (aq) + 2Br¯(aq) = Br₂ (aq) + SO₂(g) + 2H₂O(1) 13 D I T T F5 CA 6 1441 F2 +2e Cl₂ +2e Br₂ +2e I2 +2e MacBook Air Y x + | Copyright © 2023 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions Contact Us | F6 & 7 →2F 2F, →2C1, → 2Br¯, →21- U F7 7 P Pearson +2.87 V +1.36 V +1.07 V +0.54 V * 8 ►II US 0592 Vlog Q n F8 9 F9 F10 Ú✰ ✰ ☐ P Fri Apr 21 15 F11 9 of 12 + 11 F12 }
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