Question

2. The standard potentials (pH = 7) are given below for some important donors and acceptors. Compute the overall standard potential (pH = 7) for transfer of electrons from the following pairs: H2/Fe$^{3+}$, H2S/O2, CH4/NO3$^{-}$, H2/O2, Fe$^{2+}$/O2, and H2S/NO3$^{-}$ (33.3%). Reduced Species Oxidized Product Std. Potential, V H2 H$^{+}$ -0.41 H2O O2 +0.82 H2S SO4$^{2-}$ -0.22 N2 NO3$^{-}$ +0.75 Fe$^{2+}$ Fe$^{3+}$ 0.77 CH4 CO2 -0.24

          2. The standard potentials (pH = 7) are given below for some important donors and acceptors.
Compute the overall standard potential (pH = 7) for transfer of electrons from the following
pairs: H2/Fe$^{3+}$, H2S/O2, CH4/NO3$^{-}$, H2/O2, Fe$^{2+}$/O2, and H2S/NO3$^{-}$ (33.3%).
Reduced Species
Oxidized Product
Std. Potential, V
H2
H$^{+}$
-0.41
H2O
O2
+0.82
H2S
SO4$^{2-}$
-0.22
N2
NO3$^{-}$
+0.75
Fe$^{2+}$
Fe$^{3+}$
0.77
CH4
CO2
-0.24

2. The standard potentials (pH = 7) are given below for some important donors and acceptors.
Compute the overall standard potential (pH = 7) for transfer of electrons from the following
pairs: H2/Fe^3+, H2S/O2, CH4/NO3^-, H2/O2, Fe^2+/O2, and H2S/NO3^- (33.3%).
Reduced Species
Oxidized Product
Std. Potential, V
H2
H^+
-0.41
H2O
O2
+0.82
H2S
SO4^2-
-0.22
N2
NO3^-
+0.75
Fe^2+
Fe^3+
0.77
CH4
CO2
-0.24

Added by Christopher V.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Thanks for your feedback!

The standard potentials (pH = 7) are given below for some important donors and acceptors. Compute the overall standard potential (pH = 7) for the transfer of electrons from the following pairs: H2/Fe3+, H2S/O2, CH4/NO3, H2/O2, Fe2+/O2, and H2S/NO3. Reduced Species Oxidized Product Std. Potential, V H2 H+ -0.41 H2O O2 +0.82 H2S SO42- -0.22 N2 NO3 +0.75 Fe2+ Fe3+ 0.77 CH4 CO2 -0.24