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19 wnichof te flowdothe Autbou Prindp he A) Na в) s 2. C) Zn2 E) Pb2
For the reaction, Zn(s) + Pb2+(aq) <--> Zn2+(aq) + Pb(s) You would attach the black probe to...
tion 3 of 40 ) A voltaic cell employs the redox reaction: Zn (s) + Pb2+ (aq) — Zn2+ (aq) + Pb () where Pb2+ (aq) + 2e Zn2+(aq) + 2e Pb(s) E = -0.1262 V Zn(s) E = -0.7618 V The cell potential (Ecell) of this voltaic cell when [Pb2+1 = 1.10 M and [Zn2+) = 0.00110 Mis:
- Zn2+ Choose... Choose... (1pts) Identify the complete redox reaction for a ZnZn2+1|Cu2+1Cu cell. A. Zn(s) + Cu?+ (aq) (aq) + Cu(s) B. Zn(s) + Cu(s) → Zn2+ (aq) + Cu2+ (aq) C. Zn2+ (aq) + Cu(s) Zn(s) + Cu2+ (aq) D. Zn (s) + 2 Cu(s) — Zn2+ (aq) + 2 Cu2+ (aq) (1pts) Identify the complete redox reaction for a Zn/Zn2+||Pb2+1Pb cell. A. Zn (s) + Pb(s) Zn2+ (aq) + Pb2+ (aq) B. Zn2+ (aq) + Pb(s) Zn(s)...
Which of the following is semimetal? a. Na b. S c. He d. Ge e. none of the above
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)...
Separate galvanic cells are made from the following half-cells: cell 1: H+(aq)/H2(g) and Pb2+(aq)/Pb(s) cell 2: Fe2+(aq)/Fe(s) and Zn2+(aq)/Zn(s) Which of the following is correct for the working cells? Standard reduction potentials, 298 K, Aqueous Solution (pH = 0): Cl2(g) + 2e --> 2C1-(aq); E° = +1.36 V Fe3+(aq) + e --> Fe2+(aq); E° = +0.77 V Cu2+(aq) + 2e --> Cu(s); E° = +0.34 V 2H+(aq) + 2e --> H2(g); E° = 0.00 V Pb2+(aq) + 2e --> Pb(s);...
4) Identify as oxidation or reduction. Give the reason of your choice. a) Zn2+ + 2e - Zn b) Pb - Pb2+ 2e c) Cl2 + 2e - 201 d) Al - Alt + 3e
Question 3 Calculate the E if the concentration of Zn2+ = 1.5 M and Fe2+ = 0.5 M. Zn (S) + Fe2+ (aq) — Zn2+ (aq) + Fe (s) -0.44 0.83 Fe2+ (aq) + 2e — Fe(s) Zn (aq) + 2e2 Zn(s) 2 H,0() + 2e H2(g) + 2OH(aq) AP(aq) + 3e Al(s) Na (aq) + e L" (aq) + e -1.66 -2.71 3.05 Question 4
Two standard reduction potentials are given below.
Pb2+(aq) + 2 e− →
Pb(s)
E⁰red
= −0.126 V
Cl2(g) + 2 e− → 2
Cl−(aq)
E⁰red
= +1.358 V
(a) Which is a stronger reducing agent, Pb(s) or
Cl−(aq)?
Pb(s) ; or Cl−(aq)
(b) Which is the most difficult to oxidize, Pb(s) or
Cl−(aq)?
Pb(s); or Cl−(aq)
(c) Is Pb(s) able to reduce Cl2(g) in
a spontaneous reaction?
is able; or is not able
(d) Is Cl−(aq)
able to reduce Pb2+(aq)...
4. Zn2+(aq) + 2e Zn(s) E = -0.762 V Ag+ (aq) + e # Ag(s) E = 0.799 V Determine the voltage of the galvanic cell generated from these two half reactions, and calculate E of the cell when Zn2+ (aq) = 0.0100 M and Ag+ (aq) = 0.900 M at 25°C. Report the value of E