Chemistry Chemistry Practice Problems Solutions Library

Cell Potential Solutions Library

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202 solutions

Cell Potential

Q. What would the potential of a standard hydrogen (S.H.E.) electrode be if it was under the following conditions?[H+] = 0.77 MPH2 = 1.4 atmT = 298 K

Solved • Mar 31, 2020

Cell Potential

Q. One process catalyzed by NADH dehydrogenase isNADH + H+ + ubiquinone ⇌ NAD+ + ubiquinolThe standard reduction potentials for the half-reactions are...

Solved • Mar 31, 2020

Cell Potential

Q. For the following electrochemical cell Co(s)|Co2+(aq, 0.0155 M)||Ag+(aq, 2.50 M)|Ag(s) write the net cell equation. Phases are optional. Do not inc...

Solved • Mar 31, 2020

Cell Potential

Q. Which metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe?a) Agb) Cu c) Mnd) Au

Solved • Mar 25, 2020

Cell Potential

Q. Compute the equilibrium constant for the spontaneous reaction between Cd2+(aq) and Zn(s). Express your answer using two significant figures.

Solved • Mar 25, 2020

Cell Potential

Q. In the concentration cell created using Ag/Ag+, what is the value of E?

Solved • Mar 25, 2020

Cell Potential

Q. For the following electrochemical cell        Co(s)|Co2+(aq, 0.0155 M)||Ag+(aq, 1.50 M)|Ag(s)write the net cell equation. Phases are optional. Do n...

Solved • Mar 20, 2020

Cell Potential

Q. Based on the sign of E°cell, classify these reactions as spontaneous or nonspontaneous as written.  Assume standard conditions.3Fe2+(aq) + 2Cr(s) →...

Solved • Mar 17, 2020

Cell Potential

Q. For the following electrochemical cellCu(s) | Cu2+(aq,0.0155M) || Ag+(aq,1.50M | Ag(s)Write the net cell equation. Phases are optional.Calculate th...

Solved • Mar 17, 2020

Cell Potential

Q. Given that E°cell for the reaction is -0.04 VFe3+(aq) + 3e- → Fe(s)      ε° = -0.04 VCalculate the solubility product constant for FePO4(s) at 25 °...

Solved • Mar 16, 2020

Cell Potential

Q. Calculate the half-cell potential for the reaction: Fe3+(aq) + 3e- → Fe(s). Show all work and circle your final answer.

Solved • Mar 16, 2020

Cell Potential

Q. Consider a galvanic cell that uses the reaction4H3O+ (aq) + 4I- (aq) + O2 (g) → 2I2 (s) 6H2O (l).If Ecell is +0.74 V, calculate ΔG°f of I- (aq) at ...

Solved • Mar 16, 2020

Cell Potential

Q. Consider a galvanic cell that uses the reaction4H3O+ (aq) + 4I- (aq) + O2 (g) → 2I2 (s) 6H2O (l) Write the two half-cell reactions, and calculate t...

Solved • Mar 16, 2020

Cell Potential

Q. A chemist designs a galvanic cell that uses these two half-reactions:Half-reaction                                                                 ...

Solved • Mar 12, 2020

Cell Potential

Q. An electrochemical cell (battery) consists of a Cu plate immersed in 100 mL of 0.055 M Cu2+ solution and a Zn plate immersed in 100 mL of 0.550 M Z...

Solved • Jan 6, 2020

Cell Potential

Q. The value of E°cell for Cr|Cr 3+||Hg 2 2+|Hg(l) is 1.78 V. Calculate ΔG° for this reaction at 25 . a. -1220 kJb. -1031 kJc. -872 kJd. -851 kJe. -62...

Solved • Dec 19, 2019

Cell Potential

Q. If an electrochemical cell, Rb | Rb +|| Li +| Li has a standard potential of +0.02 V, what is the standard reduction potential of the Rb half-cell ...

Solved • Dec 19, 2019

Cell Potential

Q. Using the standard reduction potentials, Pb 2+(aq) + 2e– => Pb(s), E° = –0.13 V Fe 2+(aq) + 2e– => Fe(s), E° = –0.44 V Zn 2+(aq) + 2e– => ...

Solved • Dec 19, 2019

Cell Potential

Q. The nickel­cadmium battery cell has a standard potential of +1.20 V. The cell reaction is2 NiO(OH)(s) + Cd(s) + 2 H2O(l) → 2 Ni(OH)2(s) + Cd(OH)2(s...

Solved • Dec 19, 2019

Cell Potential

Q. The standard potential for the following galvanic cell is +0.90 V:3 Cu2+(aq) + 2 Ga(s) ⇌ 3 Cu(s) + 2 Ga3+(aq)Given that the standard reduction pote...

Solved • Dec 19, 2019

Cell Potential

Q. The standard cell potential (E°cell) for the voltaic cell based on the reaction below is __________ V.Sn2+(aq) + 2Fe3+(aq) → 2Fe2+(aq) + Sn4+(aq)Ha...

Solved • Dec 19, 2019

Cell Potential

Q. Calculate E°(cell) for the reaction, 10 Fe3+(aq) + I2(aq) <=> 2 IO3-(aq) + 10 Fe2+(aq) given the reductionpotentials:Fe3+(aq) + e- <=> ...

Solved • Dec 19, 2019

Cell Potential

Q. A voltaic cell (same as a galvanic cell) is created from an Co/Co2+ half-cell (E°red = -0.28) and an Al/Al3+ half-cell (E°red = -1.66 V). Calculate...

Solved • Dec 19, 2019

Cell Potential

Q. Calculate E°(cell) for the reaction, 2 IO3-(aq) + 10 Fe2+(aq) <=> 10 Fe3+(aq) + I2(aq) given the reduction potentials:Fe3+(aq) + e- ⇌ Fe2+(aq...

Solved • Dec 18, 2019

Cell Potential

Q. Consider a voltaic cell based on the half-cells:Ag+(aq) + e- → Ag(s) E° = +0.80 VSn2+(aq) + 2 e- → Sn(s) E° = -0.14 VIdentify the cathode and give ...

Solved • Dec 18, 2019

Cell Potential

Q. Calculate E° (cell) for the reaction, 10 Fe3+(aq) + I2(aq) <=> 2 IO3-(aq) + 10 Fe2+(aq) given the reduction potentials:Fe3+(aq) + e- <=&gt...

Solved • Dec 17, 2019

Cell Potential

Q. Calculate E°(cell) for the reaction, 10 Fe3+(aq) + I2(aq) <=>  2 IO3-(aq) + 10 Fe2+(aq) given the reduction potentials:Fe3+(aq) + e- <=&gt...

Solved • Dec 16, 2019

Cell Potential

Q. Consider a galvanic cell built on the following half-reactions with their standard reduction potentials shown. What is ∆G° at 25 °C for the reactio...

Solved • Dec 16, 2019

Cell Potential

Q. For the following electrochemical cellCu(s)|Cu2+(aq, 0.0155 M) || Ag+(aq, 2.50 M)|Ag(s)write the net cell equation. Phases are optional. Do not inc...

Solved • Aug 6, 2019

Cell Potential

Q. Given that E°cell = 3.20V for the reaction 2Na(in Hg) + Cl2(g) ⇌ 2Na+(aq) + 2Cl−(aq)What is E° for the reduction 2Na+(aq) + 2e−→ 2Na(in Hg)?

Solved • Aug 5, 2019

Cell Potential

Q. A chemist designs a galvanic cell that uses these two half-reactions:Write a balanced equation for the half-reaction that happens at the cathode. W...

Solved • Jul 9, 2019

Cell Potential

Q. Based on the sign of E°cell, classify these reactions as spontaneous or nonspontaneous as written. Assume standard conditions.

Solved • Jul 9, 2019

Cell Potential

Q. The standard potential for the reduction of AgSCN(s) is +0.09 V.AgSCN(s) + e-  →  Ag(s) + SCN- (aq).Using this value and the electrode potential fo...

Solved • Jan 3, 2019

Cell Potential

Q. For the reaction3 Ni2+(aq) + 2 Cr(OH)3(s) + 10 OH- (aq)  →  3 Ni(s) + 2 CrO42-(aq) + 8 H2O(l)   G = +87 kJ/molGiven the standard reduction potentia...

Solved • Jan 3, 2019

Cell Potential

Q. A voltaic cell based on the reaction 2 Eu2+(aq) + Ni2+(s)  →  2 Eu3+(aq) + Ni(s) generates Ecell = 0.07 V. Given the standard reduction potential o...

Solved • Jan 3, 2019

Cell Potential

Q. The Haber process is the principal industrial route for converting nitrogen into ammonia:N2 (g) + 3H2 (g)  →  2NH3 (g).Using the thermodynamic data...

Solved • Jan 3, 2019

Cell Potential

Q. A voltaic cell is based on Ag+(aq)/Ag(s) and Fe3+(aq)/Fe2+(aq) half-cells.What is the standard emf of the cell?

Solved • Jan 3, 2019

Cell Potential

Q. Using data from Appendix E in the textbook, calculate the equilibrium constant for the disproportionation of the copper(I) ion at room temperature:...

Solved • Jan 3, 2019

Cell Potential

Q. A voltaic cell utilizes the following reaction:2Fe3+(aq) + H2(g)  →  2Fe2+(aq) + 2H+(aq).What is the emf of this cell under standard conditions?

Solved • Jan 3, 2019

Cell Potential

Q. A voltaic cell utilizes the following reaction and operates at 298 K:3Ce4 +  (aq) + Cr(s)  →  3Ce3 +  (aq) + Cr3 +  (aq).What is the emf of this ce...

Solved • Jan 3, 2019

Cell Potential

Q. At 298 K a cell reaction has a standard emf of +0.18 V. The equilibrium constant for the cell reaction is 5.6 x 105.What is the value of n for the ...

Solved • Jan 3, 2019

Cell Potential

Q. A voltaic cell is based on the reactionSn(s) + I2 (s)  →  Sn2 +  (aq) + 2I- (aq).Under standard conditions, what is the maximum electrical work, in...

Solved • Jan 3, 2019

Cell Potential

Q. Using the standard reduction potentials listed in Appendix E in the textbook, calculate the equilibrium constant for each of the following reaction...

Solved • Jan 3, 2019

Cell Potential

Q. Using the standard reduction potentials listed in Appendix E in the textbook, calculate the equilibrium constant for each of the following reaction...

Solved • Jan 3, 2019

Cell Potential

Q. Using the standard reduction potentials listed in Appendix E in the textbook, calculate the equilibrium constant for each of the following reaction...

Solved • Jan 3, 2019

Cell Potential

Q. Using the standard reduction potentials listed in Appendix E in the textbook, calculate the equilibrium constant for each of the following reaction...

Solved • Jan 3, 2019

Cell Potential

Q. Using the standard reduction potentials listed in Appendix E in the textbook, calculate the equilibrium constant for each of the following reaction...

Solved • Jan 3, 2019

Cell Potential

Q. A cell has a standard emf of + 0.151 V at 298 K.What is the value of the equilibrium constant for the cell reaction if n = 3?

Solved • Jan 3, 2019

Cell Potential

Q. For the half-reaction Cl2(g) + 2e-  →  2Cl-(aq), what are the standard conditions for the reactant and product?

Solved • Jan 3, 2019

Cell Potential

Q. For each of the following reactions, write a balanced equation, calculate the standard emf, calculate ΔG°  at 298 K, and calculate the equilibrium ...

Solved • Jan 3, 2019

Cell Potential

Q. Using data in Appendix E in the textbook, calculate the standard emf for each of the following reactions.3Fe2+(aq)   →   Fe(s) + 2Fe3+(aq)

Solved • Jan 3, 2019

Cell Potential

Q. Using standard reduction potentials (Appendix E in the textbook), calculate the standard emf for each of the following reactions.Ni(s) + 2Ce4 +  (a...

Solved • Jan 3, 2019

Cell Potential

Q. Using standard reduction potentials (Appendix E in the textbook), calculate the standard emf for each of the following reactions.Fe(s) + 2Fe3 +  (a...

Solved • Jan 3, 2019

Cell Potential

Q. Using standard reduction potentials (Appendix E in the textbook), calculate the standard emf for each of the following reactions.2NO3-  (aq) + 8H+(...

Solved • Jan 3, 2019

Cell Potential

Q. The standard reduction potentials of the following half-reactions are given in Appendix E in the textbook:l Ag+ (aq) + e-  →  Ag(s)Cu2 +  (aq) + 2e...

Solved • Jan 3, 2019

Cell Potential

Q. Given the following half-reactions and associated standard reduction potentials:AuBr4-(aq) + 3e-  →  Au(s) + 4Br-(aq)Eredo= - 0.858VEu3+(aq) + e-  ...

Solved • Jan 3, 2019

Cell Potential

Q. A 1M solution of Cu ( NO3 )2 is placed in a beaker with a strip of Cu metal. A 1 M solution of SnSO4 is placed in a second beaker with a strip of S...

Solved • Jan 3, 2019

Cell Potential

Q. For a spontaneous reactionA(aq) + B(aq)  →  A-(aq) + B+(aq)answer the following questions:What is the sign of E°cell?

Solved • Jan 3, 2019

Cell Potential

Q. A voltaic cell that uses the reactionTl3 +  ( aq ) + 2 Cr2 +  ( aq )  →  Tl+ ( aq ) + 2Cr3 +  ( aq )has a measured standard cell potential of +1.19...

Solved • Jan 3, 2019

Cell Potential

Q. Which of the following redox reactions do you expect to occur spontaneously in the reverse direction? [Hint: The reactions are occurring under stan...

Solved • Jan 3, 2019

Cell Potential

Q. Consider the reaction: I2(s) + 2 Br–(aq) → 2 I–(aq) + Br2(l); ΔG˚ = 1.1 x 105 J. The calculation revealed that the reaction is not spontaneous. Bas...

Solved • Jan 3, 2019

Cell Potential

Q. Compute the equilibrium constant for the spontaneous reaction between Ni2+(aq) and Cd(s).

Solved • Jan 3, 2019

Cell Potential

Q. Using standard electrode potentials calculate ΔG˚rxn and use its value to estimate the equilibrium constant for each of the reactions at 25 ˚C^circ...

Solved • Jan 3, 2019

Cell Potential

Q. The saturated calomel electrode, abbreviated SCE, is often used as a reference electrode in making electrochemical measurements. The SCE is compose...

Solved • Dec 4, 2018

Cell Potential

Q. For the following half-reaction, ε° = —2.07 V:AlF63-(aq) + 3e - → Al(s) + 6F -(aq)Using data from the following table, calculate the equilibrium co...

Solved • Dec 4, 2018

Cell Potential

Q. Calculate Ksp for iron(II) sulfide given the following data:FeS(s) + 2e- → Fe(s) + S 2-(aq)      ε° = —1.01 VFe2+(aq) + 2e- →Fe(s)                 ...

Solved • Dec 4, 2018

Cell Potential

Q. A disproportionation reaction involves a substance that acts as both an oxidizing and a reducing agent, producing higher and lower oxidation states...

Solved • Dec 4, 2018

Cell Potential

Q. An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni2+] = 1.0 M separated by a porous disk from an aluminum...

Solved • Dec 4, 2018

Cell Potential

Q. Consider the galvanic cell based on the following half-reaction:Au3+ + 3e- → Au           ε° = 1.50 V      Tl + + e- → Tl            ε° = —0.34 Va....

Solved • Dec 4, 2018

Cell Potential

Q. Direct methanol fuel cells (DMFCs) have shown some promise as a viable option for providing “green” energy to small electrical devices. Calculate E...

Solved • Dec 3, 2018

Cell Potential

Q. The equation ΔG° = -nFE° also can be applied to half-reactions. Use standard reduction potentials to estimate ΔG°f for Fe2+(aq) and Fe3+(aq). (ΔG°f...

Solved • Dec 3, 2018

Cell Potential

Q. Exercise 46. Give the balanced cell equation and determine E° for the galvanic cells based on the following half-reactions. Standard reduction pote...

Solved • Dec 3, 2018

Cell Potential

Q. The amount of manganese in steel is determined by changing it to permanganate ion. The steel is first dissolved in nitric acid, producing Mn2+ ions...

Solved • Dec 3, 2018

Cell Potential

Q. Chlorine dioxide (ClO2), which is produced by the reaction 2NaClO2 (aq) + Cl2 (g) → 2ClO2 (g) + 2NaCl (aq)has been tested as a disinfectant for mun...

Solved • Dec 3, 2018

Cell Potential

Q. Calculate E° values for the following cells. Which reactions are spontaneous as written (under standard conditions)? Balance the equations that are...

Solved • Dec 3, 2018

Cell Potential

Q. Calculate E° values for the following cells. Which reactions are spontaneous as written (under standard conditions)? Balance the equations. Standar...

Solved • Dec 3, 2018

Cell Potential

Q. Calculate E° values for the following cells. Which reactions are spontaneous as written (under standard conditions)? Balance the equations. Standar...

Solved • Dec 3, 2018

Cell Potential

Q. Consider the following galvanic cells:For each galvanic cell, give the balanced cell equation and determine E°. Standard reduction potentials are f...

Solved • Dec 3, 2018

Cell Potential

Q. Sketch the galvanic cells based on the following half-reactions. Show the direction of electron flow, show the direction of ion migration through t...

Solved • Dec 3, 2018

Cell Potential

Q. S4O62−(aq) + 2I−(aq) ⟶ I2(s) + S2O32−(aq)        ΔG° = 87.8 kJ/mol(c) For the reduction half-reaction, write a balanced equation, give the oxidatio...

Solved • Nov 30, 2018

Cell Potential

Q. S4O62−(aq) + 2I−(aq) ⟶ I2(s) + S2O32−(aq)        ΔG° = 87.8 kJ/mol(b) Calculate E°cell.

Solved • Nov 30, 2018

Cell Potential

Q. Calculate the Kf of Ag(NH3)2+ fromAg+(aq) + e− ⇌ Ag(s)                                          E° = 0.80 VAg(NH3)2+(aq) + e− ⇌ Ag(s) + 2NH 3(aq)  ...

Solved • Nov 29, 2018

Cell Potential

Q. The following reactions are used in batteries:I. 2H2(g) + O2(g) ⟶ 2H2O(l)                                                    Ecell = 1.23 VII. Pb(s...

Solved • Nov 29, 2018

Cell Potential

Q. Use the following half-reactions to write three spontaneous reactions, calculate E°cell for each reaction, and rank the strengths of the oxidizing ...

Solved • Nov 28, 2018

Cell Potential

Q. Balance each skeleton reaction, use Appendix D to calculate E°cell, and state whether the reaction is spontaneous:(b) H2O2(aq) + Ni 2+(aq) ⟶ O2(g) ...

Solved • Nov 28, 2018

Cell Potential

Q. Balance each skeleton reaction, use Appendix D to calculate E°cell, and state whether the reaction is spontaneous:(a) Cu+(aq) + PbO2(s) + SO42−(aq)...

Solved • Nov 28, 2018

Cell Potential

Q. Balance each skeleton reaction, use Appendix D to calculate E°cell, and state whether the reaction is spontaneous:(b) AgCl(s) + NO(g) ⟶ Ag(s) + Cl−...

Solved • Nov 28, 2018

Cell Potential

Q. If ΔG° of the following reaction is -110 kJ/mol. what is E°cell? (F = 96.500 C • mol -1) A3- (aq) + 3B (s) → A (s) + 3B - (aq) (a) + 0.38 V (b) - 0...

Solved • Jul 9, 2018

Cell Potential

Q. Calculate ΔG°rxn and E°cell for a redox reaction with n = 2 that has an equilibrium constant of K = 4.6 x 10-2. Express your answer using two signi...

Solved • Jun 16, 2018

Cell Potential

Q. For a reaction at 25°C where n = 2 and ΔG° = 104.7 kJ calculate E°

Solved • Jun 8, 2018

Cell Potential

Q. Consider a fuel cell that uses the reaction of ethanol with oxygen to produce electricity, CH3CH2OH(l) + 3O2(g)  → 2CO2(g) + 3H2O(l) Use thermodyna...

Solved • Jun 5, 2018

Cell Potential

Q. Consider the decomposition of a metal oxide to its elements, where M represents a generic metal. M3O4(s) ⇌ 3M(s) + 2O2(g) What is the standard chan...

Solved • May 30, 2018

Cell Potential

Q. Calculate the cell potential for the following reaction as written at 25.00°C, given that [Mg2+] = 0.751 M and [Fe2+] = 0.0170 M. Standard reductio...

Solved • May 30, 2018

Cell Potential

Q. A galvanic (voltaic) cell consists of an electrode composed of titanium in a 1.0 M titanium(ll) ion solution and another electrode composed of lead...

Solved • May 30, 2018

Cell Potential

Q. The nicad (nickel-cadmium) batteries have a slightly lower cell potential than the common alkaline value of 1.5 V normally used in flashlights. The...

Solved • May 29, 2018

Cell Potential

Q. Use the appropriate standard reduction potentials in the hint to calculate the value of K at 25 °C for the reaction: 5Fe2+(aq) + MnO-4(aq) → 5Fe3+(...

Solved • May 29, 2018

Cell Potential

Q. At 1500 °C the equilibrium constant for the reaction CO(g) + 2H2(g) ⇌ CH3OH(g) has the value Kp = 1.4 x 10 -7. What is Δ G° for this reaction at 15...

Solved • May 29, 2018

Cell Potential

Q. The change in enthalpy (ΔH° rxn) for a reaction is -35.2 kJ/mol. The equilibrium constant for the reaction is 4.5x103 at 298 K. What is the equilib...

Solved • May 27, 2018

Cell Potential

Q. At 25°C, the equilibrium partial pressures for the following reaction were found to be PA = 4.00 atm, PB = 5.69 atm, PC = 5.43 atm, and PD = 5.91 a...

Solved • May 27, 2018

Cell Potential

Q. Calculate the standard potential, Eº, for this reaction from its ∆Gº value. X(s) + Y2+(aq) → X2+(aq) + Y(s)  ΔGº = -58.0 kJ

Solved • May 21, 2018