Homework Answers
The answer to this question has been explained in two parts : Part 1 and Part 2
Part 1 explains the disproportionating nature of Pb (lead) i.e. it undergoes oxidation and reduction simultaneously.
Part 2 deals with the working of a lead storage battery cell and
gives the reason as to why OPTION C is
correct.
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Use the following information to answer the next two questions. The energy from a car battery...
5. A lead storage battery involves the following two half-reactions: PbSO4(s) + 2e → Pb(s) +...
5. A lead storage battery involves the following two half-reactions: PbSO4(s) + 2e → Pb(s) + SO42- (aq); E = -0.36 V PbO2(s) + 4H*(aq) + SO42 (aq) + 2e → PbSO4(s) + 2H2O(1); E° = 1.69 V In the lead battery during the discharge reaction: A) PbSO4 is the cathode. B) PbSO4 is the anode. C) Pb is the anode. D) PbO, is the anode. E) H2SO4 is the cathode.
In a lead acid battery (the battery that is used to start your car), the following...
In a lead acid battery (the battery that is used to start your car), the following reaction occurs: Pb(s) + PbO2(s) + 2 H2SO4(aq) → 2 PbSO4(s) + 2 H2O(l) How many electrons are transferred in this reaction? Enter your answer as an integer.
5. What is the concentration of silver(I) ion in a saturated solution of silver(I) carbonate containing...
5. What is the concentration of silver(I) ion in a saturated solution of silver(I) carbonate containing 0.0030 M Na2CO3? For Ag2CO3, Ksp = 8.6 x 10-12. A) 6.0 x 10-4 M B) 2.0 x 10-'M C) 8.0 x 10-'M D) 5.4 x 10-5M E) 8.0 x 10-4M 6. Balance the following oxidation-reduction occurring in acidic solution. MnO4 (aq) + Co2+(aq) →Mn²+ (aq) + Co3+ (aq) A) B) C) D) E) MnO4 (aq) + 8 H+ (aq) + Co2+(aq) Mn²+ (aq)...
Use the following lead-acid battery cell to answer the related questions: PbO2 (s) │PbSO4 (s) │H2SO4...
Use the following lead-acid battery cell to answer the related questions: PbO2 (s) │PbSO4 (s) │H2SO4 (aq) (1 M) ‖ H2SO4 (aq) (1 M)│Pb (s) │PbSO4 (s) A. (5 pts) Determine the Cell potential for the battery at 25°C B. (5 pts) A high output alternator for a KIA soul can produce 220 Amp current. How long would it take to recharge/reform 4.03 kg of Pb at that rate (assuming your battery is near dead)?
The spontaneous galvanic cell of a lead storage battery (a typical car battery) is composed of the following reduction half reactions reduced 1.69 v Pb02 (s)+ HSO, (aq)+3 Ha0 (aq) + 2 e Pbs04 (s)...
The spontaneous galvanic cell of a lead storage battery (a typical car battery) is composed of the following reduction half reactions reduced 1.69 v Pb02 (s)+ HSO, (aq)+3 Ha0 (aq) + 2 e Pbs04 (s)+5 H20) PbSO4 (s) + H3O (aq) 2 e Pb (s)+HSO (aq)+ H20 (I) E reduced 0.36 V How much current (in A) does a cell phone charger for your car use if your car dies after 14 hours of leaving the phone plugged in without...
POST-LAB QUESTIONS (Students must answer all the post-lab questions in this section) 1. For the following...
POST-LAB QUESTIONS (Students must answer all the post-lab questions in this section) 1. For the following reactions identify: a) 2 Al(s) + 3Cl2(g) 2 AlCl3(s) Substance oxidized: Substance reduced: Oxidizing agent: Reducing agent: b) 8H(aq) + MnO4(aq) + 5Fe2(aq) -5Fe3+ (aq) + Mn2+ (aq) + 4H2O(1 Substance oxidized: Substance reduced: Oxidizing agent: Reducing agent: c) FeS(s) + 3NO3(aq) + 4H*(aq) 3NO(g) + SO42(aq) + Fe (aq) + 2H2O(1) Substance oxidized: Substance reduced: Oxidizing agent: Reducing agent: d) Zn(s) + 2HCl(aq)...
In a common car battery, six identical cells each carry out the following reaction where two...
In a common car battery, six identical cells each carry out the following reaction where two moles of e- are transferred from Pb to Pb4+: Pb + PbO2 + 2HSO4– + 2H+ → 2PbSO4 + 2H2O (E° = 2.04 V) For such a cell, calculate ΔG° at 25°C A) (-98 ± 1) kJ B) (-394 ± 1) kJ C) (-787 ± 1) kJ D) (-197 ± 1) kJ ------------------------------------------------------------------------------------------------------------ Calculate Ecell at 298K for a concentration cell made with silver...
7. Using the following reaction progress diagram, answer the questions below: wiring Energy A G Rxn....
7. Using the following reaction progress diagram, answer the questions below: wiring Energy A G Rxn. a. How many steps are in the reaction? How do you know? (4 points) b. Which letter corresponds to the rate-determining-step? Explain your choice. (6 points) c. Is the reaction exothermic or endothermic? How do you know? (4 points) d. If the energy at point B is lowered, what will happen to the rate of the reaction will it increase, decrease, or stay the...
Candidate l: Zn(s) | Zn2+(aq,0.500 M) I Cu2+(aq, 1.00 M) Cu(s) Candidate 2: Pb(s) | Pb2+(aq,...
Candidate l: Zn(s) | Zn2+(aq,0.500 M) I Cu2+(aq, 1.00 M) Cu(s) Candidate 2: Pb(s) | Pb2+(aq, 0.500 M) || Cu2+(aq, 1.00 M) Cu(s) Candidate 3: Mg(s) | Mg2+(aq, 0.500 M) | Pb2+(aq, 1.00 M)| Pb(s) (a) 6 pts) Choose one of the candidate voltaic cells #1, #2, or #3. Draw a schematic cell diagram for the candidate voltaic cell of choice. Clearly label anode, cathode, electrodes, ions and their concentrations, salt bridge, and the flow of electrons. (b) (5 pts)...
Answer the following questions related to the givenelectrochemical cell under standard conditions.W3+(aq) + 3e−...
Answer the following questions related to the given electrochemical cell under standard conditions.W3+(aq) + 3e− ⇌ W(s)E° = 0.100 VCo2+(aq) + 2e− ⇌ Co(s)E° = -0.280 V1. Answer the following questions.(a) The half cell containing W/W3+ is the anode/ cathode(b) Which one of the following statements isTRUE for the half cell containing W and W3+.W3+ will be oxidized to form W.W3+ will be reduced to form W.W will be reduced to form W3+.W will be oxidized to form W3+.(c) The half...
5. A lead storage battery involves the following two half-reactions: PbSO4(s) + 2e → Pb(s) + SO42- (aq); E = -0.36 V PbO2(s) + 4H*(aq) + SO42 (aq) + 2e → PbSO4(s) + 2H2O(1); E° = 1.69 V In the lead battery during the discharge reaction: A) PbSO4 is the cathode. B) PbSO4 is the anode. C) Pb is the anode. D) PbO, is the anode. E) H2SO4 is the cathode.
5. What is the concentration of silver(I) ion in a saturated solution of silver(I) carbonate containing 0.0030 M Na2CO3? For Ag2CO3, Ksp = 8.6 x 10-12. A) 6.0 x 10-4 M B) 2.0 x 10-'M C) 8.0 x 10-'M D) 5.4 x 10-5M E) 8.0 x 10-4M 6. Balance the following oxidation-reduction occurring in acidic solution. MnO4 (aq) + Co2+(aq) →Mn²+ (aq) + Co3+ (aq) A) B) C) D) E) MnO4 (aq) + 8 H+ (aq) + Co2+(aq) Mn²+ (aq)...
The spontaneous galvanic cell of a lead storage battery (a typical car battery) is composed of the following reduction half reactions reduced 1.69 v Pb02 (s)+ HSO, (aq)+3 Ha0 (aq) + 2 e Pbs04 (s)+5 H20) PbSO4 (s) + H3O (aq) 2 e Pb (s)+HSO (aq)+ H20 (I) E reduced 0.36 V How much current (in A) does a cell phone charger for your car use if your car dies after 14 hours of leaving the phone plugged in without...
POST-LAB QUESTIONS (Students must answer all the post-lab questions in this section) 1. For the following reactions identify: a) 2 Al(s) + 3Cl2(g) 2 AlCl3(s) Substance oxidized: Substance reduced: Oxidizing agent: Reducing agent: b) 8H(aq) + MnO4(aq) + 5Fe2(aq) -5Fe3+ (aq) + Mn2+ (aq) + 4H2O(1 Substance oxidized: Substance reduced: Oxidizing agent: Reducing agent: c) FeS(s) + 3NO3(aq) + 4H*(aq) 3NO(g) + SO42(aq) + Fe (aq) + 2H2O(1) Substance oxidized: Substance reduced: Oxidizing agent: Reducing agent: d) Zn(s) + 2HCl(aq)...
7. Using the following reaction progress diagram, answer the questions below: wiring Energy A G Rxn. a. How many steps are in the reaction? How do you know? (4 points) b. Which letter corresponds to the rate-determining-step? Explain your choice. (6 points) c. Is the reaction exothermic or endothermic? How do you know? (4 points) d. If the energy at point B is lowered, what will happen to the rate of the reaction will it increase, decrease, or stay the...
Candidate l: Zn(s) | Zn2+(aq,0.500 M) I Cu2+(aq, 1.00 M) Cu(s) Candidate 2: Pb(s) | Pb2+(aq, 0.500 M) || Cu2+(aq, 1.00 M) Cu(s) Candidate 3: Mg(s) | Mg2+(aq, 0.500 M) | Pb2+(aq, 1.00 M)| Pb(s) (a) 6 pts) Choose one of the candidate voltaic cells #1, #2, or #3. Draw a schematic cell diagram for the candidate voltaic cell of choice. Clearly label anode, cathode, electrodes, ions and their concentrations, salt bridge, and the flow of electrons. (b) (5 pts)...
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