1. Define electron donor and electron acceptor 2. What is the oxidation state of nitrogen in:...
1. Define electron donor and electron acceptor
2. What is the oxidation state of nitrogen in: NH3, NH4+, N2, NO2-, NO3- ?
3. Is the transformation of NO3- to NO2- an oxidation or a reduction?
4. Is the transformation of nitrate to nitrogen gas an oxidation or a reduction? How many electron equivalents are transferred per mole of nitrate?
5. Is the transformation of NH4+ to NO2- an oxidation or a reduction? How many electron equivalents are transferred per mole of nitrate?
6. How many electron equivalents are transferred in the transformation of one mole of NH4+ to NH3?
Homework Answers
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1. Define electron donor and electron acceptor
2. What is the oxidation state of nitrogen in:...
Problem 5: Write the redox reaction for the following chemicals and label the electron donor, electron...
Problem 5: Write the redox reaction for the following chemicals and label the electron donor, electron acceptor, oxidation reaction, reduction reaction, oxidant and reductant, oxidized compound and reduced compound: (12 points) a. O2/H2O and SO42-/HS- b. NO3-/N2 and CO2/CH4 c. SO42-/HS- and CO2/CH4
Redox: The best initial electron donor for an organism performing fermentation would be ___, while the best final electron acceptor would be ___ . Use the information from the redox couples below to a...
Redox: The best initial electron donor for an
organism performing fermentation would be ___, while the best final
electron acceptor would be ___ .
Use the information from the redox couples below to answer the fill in the blank questions, using the letter after each substance. (i.e. if you believe that the answer is CoQ fill in the appropriate blank with the letter A). Each letter (substance) may be used more than once. Hint: put the redox couples into an...
Cd2+ + Ni2++ 2H20Cd + NiO2+ 4H In the above reaction, the oxidation state of nickel...
Cd2+ + Ni2++ 2H20Cd + NiO2+ 4H In the above reaction, the oxidation state of nickel changes from to How many electrons are transferred in the reaction? 2NH2OH +21 12+ N2H4+20H In the above reaction, the oxidation state of nitrogen changes from y to How many electrons are transferred in the reaction? Use the References to access important values if needed for this question. Fe2+ + NO3 + 2A »NO2 + Fe3++ H2O v to In the above reaction, the...
4cK + N2+ 4H20—>N,H4 + 2Cl2+ 40H In the above reaction, the oxidation state of nitrogen...
4cK + N2+ 4H20—>N,H4 + 2Cl2+ 40H In the above reaction, the oxidation state of nitrogen changes from to - How many electrons are transferred in the reaction? Cd + C10+ 2H+ --Cd2+ + C103+H20 In the above reaction, the oxidation state of cadmium changes from - to - How many electrons are transferred in the reaction?
NO3- + 3Cu++ 4H+------>NO + 3Cu2++ 2H2O In the above reaction, the oxidation state of nitrogen...
NO3- + 3Cu++ 4H+------>NO + 3Cu2++ 2H2O In the above reaction, the oxidation state of nitrogen changes from ___to ___ How many electrons are transferred in the reaction?
Some bacteria can use nitrate as an electron acceptor instead of oxygen, reducing it to nitrite....
Some bacteria can use nitrate as an electron acceptor instead of oxygen, reducing it to nitrite. This requires an enzyme called nitrate reductase. The reduction and oxidation redox equations I am using are: NO3- +2H+ +2e- ---> NO2- + H2O NAD+ + 2H+ +2e- ---> NADH + H+ I calculated the Gibbs free energy change under standard state conditions for the oxidation of NADH by nitrate to be -144.75 kJ/mol. Please use the value to help solve part a. Please...
Questions: After adding Nitrate Reagent A and B, there was no red color change. You then...
Questions: After adding Nitrate Reagent A and B, there was no red color change. You then added a pinch of zinc powder with a formation of a red color. What category of nitrate reduction, would this microbe be? Explain how this red color change occurred? Denitrification part of the nitrogen cycle. Some microbes use this pathway anaerobically to convert nitrates (NO3- ) to nitrogen (N2) gas. Other bacteria in anaerobic conditions, use what is called a Dissimilatory nitrate reduction to...
25. The oxidation number (state) for iron (Fe) in FeCl2 is A) -1 B) +2 C)...
25. The oxidation number (state) for iron (Fe) in FeCl2 is A) -1 B) +2 C) +3 D) -2 Page 4 26. In general, as temperature increases, reaction rate A) increases B) decreases C) remains constant D) stoichiometrically converts 27. A) Oxidation occurs at the anode of a spontaneous galvanic cell. B) Reduction C) Electrolysis D) Corrosion 28. A Lewis Acid is an electron A) donor B) acceptor C) eliminator D) coupler
Redox : If members of the redox couples above were used to set up the most energetically favorable chemical reaction, the initial electron donor should be ___and the final electron acceptor should be...
Redox : If members of the redox couples above were used to set
up the most energetically favorable chemical
reaction, the initial electron donor should be
___and the final electron acceptor should be
___.
Use the information from the redox couples below to answer the fill in the blank questions, using the letter after each substance. (i.e. if you believe that the answer is CoQ fill in the appropriate blank with the letter A). Each letter (substance) may be used...
1. What is the redox state of Oxygen in a molecule of diatomic hydrogen gas (H2)?...
1. What is the redox state of Oxygen in a molecule of diatomic hydrogen gas (H2)? 2. NO2- + 6e- -> NH4+ (-0.41 volts) & O2 + 4e- -> 2H2O (+0.82 volts) If you balance and combine the reactions so that 52 molecules of NH4+ are oxidized to NO2-, how many molecules of O2 will be reduced to H2O? 3. NO3- + 10e- -> N2 (E0 = +0.74 V) & H+ + 2e- -> H2 (E0 = -0.42 V) If...
Redox: The best initial electron donor for an
organism performing fermentation would be ___, while the best final
electron acceptor would be ___ .
Use the information from the redox couples below to answer the fill in the blank questions, using the letter after each substance. (i.e. if you believe that the answer is CoQ fill in the appropriate blank with the letter A). Each letter (substance) may be used more than once. Hint: put the redox couples into an...
Cd2+ + Ni2++ 2H20Cd + NiO2+ 4H In the above reaction, the oxidation state of nickel changes from to How many electrons are transferred in the reaction? 2NH2OH +21 12+ N2H4+20H In the above reaction, the oxidation state of nitrogen changes from y to How many electrons are transferred in the reaction? Use the References to access important values if needed for this question. Fe2+ + NO3 + 2A »NO2 + Fe3++ H2O v to In the above reaction, the...
4cK + N2+ 4H20—>N,H4 + 2Cl2+ 40H In the above reaction, the oxidation state of nitrogen changes from to - How many electrons are transferred in the reaction? Cd + C10+ 2H+ --Cd2+ + C103+H20 In the above reaction, the oxidation state of cadmium changes from - to - How many electrons are transferred in the reaction?
25. The oxidation number (state) for iron (Fe) in FeCl2 is A) -1 B) +2 C) +3 D) -2 Page 4 26. In general, as temperature increases, reaction rate A) increases B) decreases C) remains constant D) stoichiometrically converts 27. A) Oxidation occurs at the anode of a spontaneous galvanic cell. B) Reduction C) Electrolysis D) Corrosion 28. A Lewis Acid is an electron A) donor B) acceptor C) eliminator D) coupler
Redox : If members of the redox couples above were used to set
up the most energetically favorable chemical
reaction, the initial electron donor should be
___and the final electron acceptor should be
___.
Use the information from the redox couples below to answer the fill in the blank questions, using the letter after each substance. (i.e. if you believe that the answer is CoQ fill in the appropriate blank with the letter A). Each letter (substance) may be used...
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