Question

In: Chemistry

QUESTION 2 The following reactions in certain anaerobic soils control the solubility of Fe2+ and Mn2+...

QUESTION 2

The following reactions in certain anaerobic soils control the solubility of Fe2+ and Mn2+ in soil solutions:

γ-MnOOH(s) + 3H+(aq) + e- = Mn2+(aq) + 2H2O E0 = 1.457 V Fe(OH)3(s) + 3H+(aq) + e- = Fe2+(aq) + 3H2O E0 = 1.057 V

(A) Which mineral is the stronger oxidant, γ-MnOOH or Fe(OH)3?

(B) Define the redox equilibrium between γ-MnOOH(s) and Fe2+(aq) using the two half

reactions defined above. In a soil that is at equilibrium with this reaction, what is the concentration of Fe2+(aq) when the concentration of Mn2+ is 10-5 M?

(C) Calculate the Eh and pe of this soil if the pH is 7 and the Mn2+ activity is 10-5M.
(D) If molecular oxygen were introduced into this anaerobic soil system, what would be the

likely sequence of chemical processes with respect to the above reactions?

Solutions

Expert Solution

The calculations of these questions uploaded as images.

queen_honey_blossom answered 2 years ago
Next > < Previous

Related Solutions

Balance the following reaction equations in ACIDIC condition. a,MnO4- (aq) + Fe2+ (aq) → Mn2+ (aq)+...
Balance the following reaction equations in ACIDIC condition. a,MnO4- (aq) + Fe2+ (aq) → Mn2+ (aq)+ Fe3+ (aq) b,MnO4- (aq) + C2O4-2 (aq) → Mn2+ (aq)+ CO2 (aq)
Consider the following half reactions at 298 K Fe2+ + 2 e- → Fe    Eo = -0.441...
Consider the following half reactions at 298 K Fe2+ + 2 e- → Fe    Eo = -0.441 V Cd2+ + 2 e- → Cd    Eo = -0.403 V A galvanice cell based on these half reactions is set up under standard conditions where each solution is 1.00 L and each electrode weighs exactly 100.0 g. How much will the Cd electrode weigh when the nonstandard potential of the cell is 0.02804 V?
Consider the following half reactions at 298 K Fe2+ + 2 e- → Fe    Eo = -0.441...
Consider the following half reactions at 298 K Fe2+ + 2 e- → Fe    Eo = -0.441 V Cd2+ + 2 e- → Cd    Eo = -0.403 V A galvanice cell based on these half reactions is set up under standard conditions where each solution is 1.00 L and each electrode weighs exactly 100.0 g. How much will the Cd electrode weigh when the nonstandard potential of the cell is 0.02880 V? The answer is 139g.
Garnet typically has the chemical formula: (Fe2+, Mg2+, Ca 2+, Mn2+)3 Al3+2Si4+3O12 The formula can be...
Garnet typically has the chemical formula: (Fe2+, Mg2+, Ca 2+, Mn2+)3 Al3+2Si4+3O12 The formula can be broken up into structural sites (spaces where cations of a certain size range can occupy) X3Y2Z3O12 where the X-site is coordinated with 8 oxygen anions, the Y-site is coordinated with 6 oxygen anions, and the Z-site is coordinated with 4 oxygen anions. Using the table of ionic radii, calculate the predicted coordination number (CN) relative to O2- for each cation in the garnet formula....
Garnet typically has the chemical formula: (Fe2+, Mg2+, Ca 2+, Mn2+)3 Al3+2Si4+3O12 The formula can be...
Garnet typically has the chemical formula: (Fe2+, Mg2+, Ca 2+, Mn2+)3 Al3+2Si4+3O12 The formula can be broken up into structural sites (spaces where cations of a certain size range can occupy) X3Y2Z3O12 where the X-site is coordinated with 8 oxygen anions, the Y-site is coordinated with 6 oxygen anions, and the Z-site is coordinated with 4 oxygen anions. Using the table of ionic radii, calculate the predicted coordination number (CN) relative to O2- for each cation in the garnet formula....
Calculate Ecell for the following electrochemical cell: Pt/Fe2+ (0.0725M), Fe3+ (0.110M)// MnO4- (0.0822M), H+ (1.00M), Mn2+...
Calculate Ecell for the following electrochemical cell: Pt/Fe2+ (0.0725M), Fe3+ (0.110M)// MnO4- (0.0822M), H+ (1.00M), Mn2+ (0.0205M) /Pt
Calculate E∘cell for each of the following balanced redox reactions. Are the reactions spontanous? A) 2Cu(s)+Mn2+(aq)→2Cu+(aq)+Mn(s)...
Calculate E∘cell for each of the following balanced redox reactions. Are the reactions spontanous? A) 2Cu(s)+Mn2+(aq)→2Cu+(aq)+Mn(s) B) MnO2(s)+4H+(aq)+Zn(s)→Mn2+(aq)+2H2O(l)+Zn2+(aq) C) Cl2(g)+2F−(aq)→F2(g)+2Cl−(aq)
Balance the following redox reactions 1) SO3-(aq) + MnO4-(aq) -> SO42-(aq) + Mn2+ (aq) in acidic...
Balance the following redox reactions 1) SO3-(aq) + MnO4-(aq) -> SO42-(aq) + Mn2+ (aq) in acidic solution 2) H2O2(aq) + ClO2(aq) -> ClO2-(aq) + O2(g) in basic solution
Complete and Balance the following half-reactions (steps2-5 in half reaction method): MnO4−(aq) ⟶ Mn2+(aq) (in acidic...
Complete and Balance the following half-reactions (steps2-5 in half reaction method): MnO4−(aq) ⟶ Mn2+(aq) (in acidic solution)
under a certain set of conditions the solubility of Ag2CO3 is 3.5x10^-2 g/L. what is the...
under a certain set of conditions the solubility of Ag2CO3 is 3.5x10^-2 g/L. what is the ksp?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT