3. Construct a pe-pH diagram for nitrogen considering the species: NO3¯, NO2, NH3, and NH4+ i. ii. NO3 + 10H + 8e¯ ↔ NH4* + 3H₂O NO2 + 8H++ 6e¯ ↔ NH4+ + 2H2O peº = 14.88 peº = 15.08 iii. NO2 + 7H++ 6e¯ ↔ NH3 + 2H2O peº = 13.54 iv. NO3+9H++ 8e ↔ NH3 + 3H2O peº = 13.73 V. NO3 + 2H+ + 2e¯ ↔ NO₂¯ + H₂O peº = 14.28 vi. NH4+ NH3 + H+ pKa = 9.25 a. Derive pe-pH equations for reactions (i) to (viii). For each reaction, assume the concentrations of oxidized and reduced forms of nitrogen are equal to one another. b. Using the equations for part (a), plot the lines on a pe-pH diagram. Label the predominance area for each nitrogen species.
3. Construct a pe-pH diagram for nitrogen considering the species: NO3¯, NO2, NH3, and NH4+ i. ii. NO3 + 10H + 8e¯ ↔ NH4* + 3H₂O NO2 + 8H++ 6e¯ ↔ NH4+ + 2H2O peº = 14.88 peº = 15.08 iii. NO2 + 7H++ 6e¯ ↔ NH3 + 2H2O peº = 13.54 iv. NO3+9H++ 8e ↔ NH3 + 3H2O peº = 13.73 V. NO3 + 2H+ + 2e¯ ↔ NO₂¯ + H₂O peº = 14.28 vi. NH4+ NH3 + H+ pKa = 9.25 a. Derive pe-pH equations for reactions (i) to (viii). For each reaction, assume the concentrations of oxidized and reduced forms of nitrogen are equal to one another. b. Using the equations for part (a), plot the lines on a pe-pH diagram. Label the predominance area for each nitrogen species.
Chemistry
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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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Transcribed Image Text:3. Construct a pe-pH diagram for nitrogen considering the species: NO3¯, NO2, NH3,
and NH4+
i.
ii.
NO3 + 10H + 8e¯ ↔ NH4* + 3H₂O
NO2 + 8H++ 6e¯ ↔ NH4+ + 2H2O
peº = 14.88
peº = 15.08
iii.
NO2 + 7H++ 6e¯ ↔
NH3 + 2H2O
peº = 13.54
iv.
NO3+9H++ 8e ↔
NH3 + 3H2O
peº = 13.73
V.
NO3 + 2H+ + 2e¯ ↔
NO₂¯ + H₂O
peº = 14.28
vi.
NH4+ NH3 + H+
pKa = 9.25
a. Derive pe-pH equations for reactions (i) to (viii). For each reaction, assume the
concentrations of oxidized and reduced forms of nitrogen are equal to one another.
b. Using the equations for part (a), plot the lines on a pe-pH diagram. Label the
predominance area for each nitrogen species.
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