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- 1. Multiple ChoiceThis electrode in a voltaic cell loses massAnodeCathode
- 2. Multiple ChoiceIn a voltaic cell, the half cell that receives cations from the salt bridge isCathodeAnode
- 3. Multiple Choice
In the reactions
Sn+2 + 2Fe+3 --> Sn+4 + 2Fe+2,
the reducing agent is
Fe+3
Sn+2
Sn+4
Fe+2
- 4. Multiple Choice
What is the equation and cell potential?2Al3+ + 3Ni → 2Al + 3Ni2+ EO = 1.89 V2Al + 3Ni2+ → 2Al3+ + 3Ni EO = 1.89 V2Al3+ + 3Ni → 2Al + 3Ni2+ EO = 1.43 V2Al + 3Ni2+ → 2Al3+ + 3Ni EO = 1.43 V - 5. Multiple ChoiceCalculate the cell potential of voltaic cell–1.51- 0.03+0.03+1.51
- 6. Multiple ChoiceWhat is Eo for the following reaction?+0.85+0.51–1.53–1.87
- 7. Multiple ChoiceWhat is cell potential?0.670.931.471.73
- 8. Multiple Choice
AlF6 3– + 3 e– → Al + 6 F– 1
Which of the following occurs in the reaction?
AlF63– is reduced at the cathode.
Al is oxidized at the anode.
Aluminum is converted from the –3 oxidation state to the 0 oxidation state.
Aluminum is converted from the –3 oxidation state to the 0 oxidation state.
- 9. Multiple Choice
Which of the following statements applies to the change in mass of the electrodes involved in this electrochemical cell?
Electrode A is the anode and it gains mass
since metal ions are being converted to metal
atoms which often adhere to the electrode.
Electrode B is the anode and it gains mass
since metal ions are being converted to metal
atoms which often adhere to the electrode.
Electrode A is the cathode and it gains mass since metal ions are being converted to metal atoms which often adhere to the electrode.
Electrode B is the cathode and it gains mass since metal ions are
being converted to metal atoms which often adhere to the electrode.
- 10. Multiple Choice
Which of the following best describes the function of the portion of the electrochemical cell labeled B?
Structure B functions to complete the electrical circuit present in the electrolytic cell.
Structure B provides soluble anions that migrate to the anode as well as soluble cations that migrate to the cathode, thus maintaining a balance of charge in the electrolytic cell.
Structure B provides soluble anions that migrate to the anode as well as soluble cations that migrate to the cathode, thus maintaining a balance of charge in the galvanic cell.
Structure B provides soluble anions that migrate to the cathode as well as soluble cations that migrate to the anode, thus maintaining a charge balance in the galvanic cell.
- 11. Multiple Choice
An experiment was conducted in which two test tubes were filled with water at 25C and 1 atm pressure. Each test tube was subsequently inverted into a beaker containing water which was then acidified.
Which of the following best describes the reaction taking place in Test Tube A?
Eocell is positive, Go is positive
Eocell is positive, Go is negative
Eocell is negative, Go is positive
Eocell is negative, Go is negative
- 12. Multiple Choice
Cu(s) + 2 Ag+(aq) --> Cu2+(aq) + 2 Ag(s) E° = +0.460 V
Which process occcrs in the cathode compartment of this cell?
Ag+(aq) ions move toward the electrode
Ag+(aq) ions move away from the electrode
Cu2+(aq) ions move toward the electrode
Cu2+(aq) ions move away from the electrode
- 13. Multiple Choice
Cu(s) + 2 Ag+(aq) --> Cu2+(aq) + 2 Ag(s) E° = +0.460 V
The value of the free energy change (ΔG°) for this reaction is
+0.460 kJ
-888,000 kJ
460. kJ
-888 kJ
- 14. Multiple Choice
1 - 2 H2(g) + 4 OH-(aq) --> 4 H2O(l) + 4 e-
2 - O2(g) + 4 H+(aq) + 4 e- --> 2 H2O(l)
3 - NO(g) + 2 H2O(l) --> NO3-(aq) + 4 H+(aq) + 3 e-
Which of the half-reactions above will be shifted toward the products with an increase in pH?
1 only
2 only
1 and 3 only
1, 2, and 3
- 15. Multiple ChoiceThe covering of a thin layer of metal iselectrowinningelectrorefiningelectroplatingelectromachining
- 16. Multiple Choice
An oxidizing agent will
increase in mass
lose electrons
be reduced
increase in oxidation number
- 17. Multiple ChoiceConsider the galvanic cell given.
Which of the following deductions about this cell is correct?Oxidation is occurring in half-cell 2The positive electrode is in half-cell 2Oxidation is occurring in half-cell 1The negative electrode is in half-cell 1 - 18. Multiple ChoiceA galvanic cell is established to power a torch, as shown.
For this cell, theelectrons will flow from the aluminium to the hydrogen half-cellaluminium electrode will be the positive anodeconcentration of aluminium ions in solution will be fallinghydrogen half-cell will be the negative cathode - 19. Multiple ChoiceA galvanic cell is established to power a torch, as shown.
For this cell, the overall equation will be2Al(s)+3H2(g)→2Al3+(aq)+6H+(aq)3Cl-(aq)+Al(s)→AlCl3(aq)2Al3+(aq)+3H2(g)→2Al(s)+6H+(aq)2Al(s)+6H+(aq)→2Al3+(aq)+3H2(g) - 20. Multiple Choice
In the above Galvanic Cell, which half cell is undergoing reduction?
Cu | Cu2+
Zn | Zn2+
- 21. Multiple Choice
A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg
Which is the half-reaction occurring at the anode?
HgO + 2 e- → Hg + O2-
Zn2+ + 2 e- → Zn
Zn → Zn2+ + 2 e-
ZnO + 2 e- → Zn
- 22. Multiple Choice
When water is electrolyzed, gas collected at cathode, is
sulphur
oxygen
hydrogen
sulphur dioxide
- 23. Multiple Choice
Given their standard reduction potentials, which of the species is going to be oxidized?
Cu2+/Cu = 0.34V
Zn2+/Zn = -0.76V
Cu
Zn
CuSO4
ZnSO4
- 24. Multiple Choice
What occurs to the mass of copper electrode in the following reaction?
Zn/Zn2+ // Cu2+/Cu
increases
decreases
remains the same
- 25. Multiple Choice
What would be the theoretical cell potential of the an electrochemical cell between silver and nickel?
Ag+/Ag = 0.80V
Ni2+/Ni = -0.25V
1.05V
-1.05V
0.55V
-0.55V
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