A standard galvanic cell is constructed in which a Pb 2+ | Pb half cell acts as
ID: 1041506 • Letter: A
Question
A standard galvanic cell is constructed in which a Pb2+ | Pb half cell acts as the cathode. Which of the following statements are correct?
Hint: Refer to a table of standard reduction potentials.
(Choose all that apply.)
The cathode reaction is Pb2+ + 2e- -> Pb.
The cathode reaction is Pb -> Pb2+ + 2e-.
The anode compartment could be Cl2|Cl-.
In the external circuit, electrons flow from the other compartment to the Pb2+|Pb compartment.
As the cell runs, anions will migrate from the other compartment to the Pb2+|Pb compartment.
2.
A standard galvanic cell is constructed in which a Cu2+ | Cu+ half cell acts as the cathode. Which of the following statements are correct?
Hint: Refer to a table of standard reduction potentials.
(Choose all that apply.)
Cr3+|Cr2+ could be the other standard half cell.
The cathode reaction is Cu+ -> Cu2+ + e-
As the cell runs, anions will migrate from the Cu2+|Cu+ compartment to the other compartment.
The anode reaction could be Cr2+ -> Cr3+ + e-
Br2|Br- could be the other standard half cell.
3.
A voltaic cell is constructed from a standard Co2+|Co half cell (E°red = -0.280V) and a standard Mg2+|Mg half cell (E°red = -2.370V).
The anode reaction is:
The cathode reaction is:
The spontaneous cell reaction is:
The cell voltage is V.
4.Consider the following half-reactions:
(5) Will Br2(l) oxidize Fe(s) to Fe2+(aq)? _____yesno
5.Use a table of Standard Reduction Potentials to predict if a reaction will occur between Co metal and Cl2(g), when the two are brought in contact via standard half-cells in a voltaic cell.If a reaction will occur, write a balanced net ionic equation for the reaction, assuming that the product ions are in aqueous solution. If no reaction will occur, leave all boxes blank.
Use the table 'Standard Reduction Potentials' located in the 'Tables', to predict if a reaction will occur when Cu metal is put into a 1M aqueous Mg2+solution.
If a reaction will occur, write a balanced net ionic equation for the reaction. If no reaction will occur, leave all boxes blank.
Explanation / Answer
Answer 1. a) The cathode Reaction is Pb2+ + 2e- —> Pb
d) In the external sector, the electrons flow from the other compartment to the Pb2+|Pb compartment.
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