Question

Which of these redox reactions do you expect to occur spontaneously in the forward direction? Standard Electrode Potentials at 25 °C Reduction Half-Reaction E° (V) Ni2+(aq) + 2 e- ? Ni(s) -0.23 Zn2+(aq) + 2 e- ? Zn(s) -0.76 Cd2+(aq) + 2 e- ? Cd(s) -0.40 Co2+(aq) + 2 e- ? Co(s) -0.28 Pb2+(aq) + 2 e- ? Pb(s) -0.13 Fe2+(aq) + 2 e- ? Fe(s) -0.45 Al3+(aq) + 3 e- ? Al(s) -1.66 Ag+(aq) + e- ? Ag(s) 0.80 Cr3+(aq) + 3 e- ? Cr(s) -0.73 Mn2+(aq) + 2 e- ? Mn(s) -1.18 Check all that apply. Ni(s) + Zn2+(aq) ? Ni2+(aq) + Zn(s) Fe2+(aq) + Cd(s) ? Fe(s) + Cd2+(aq) Al(s) + 3 Ag+(aq) ? Al3+(aq) + 3 Ag(s) Ni(s) + Pb2+(aq) ? Ni2+(aq) + Pb(s)

          Which of these redox reactions do you expect to occur spontaneously in the forward direction?
Standard Electrode Potentials at 25 °C
Reduction Half-Reaction
E° (V)
Ni2+(aq) + 2 e- ? Ni(s)
-0.23
Zn2+(aq) + 2 e- ? Zn(s)
-0.76
Cd2+(aq) + 2 e- ? Cd(s)
-0.40
Co2+(aq) + 2 e- ? Co(s)
-0.28
Pb2+(aq) + 2 e- ? Pb(s)
-0.13
Fe2+(aq) + 2 e- ? Fe(s)
-0.45
Al3+(aq) + 3 e- ? Al(s)
-1.66
Ag+(aq) + e- ? Ag(s)
0.80
Cr3+(aq) + 3 e- ? Cr(s)
-0.73
Mn2+(aq) + 2 e- ? Mn(s)
-1.18
Check all that apply.
Ni(s) + Zn2+(aq) ? Ni2+(aq) + Zn(s)
Fe2+(aq) + Cd(s) ? Fe(s) + Cd2+(aq)
Al(s) + 3 Ag+(aq) ? Al3+(aq) + 3 Ag(s)
Ni(s) + Pb2+(aq) ? Ni2+(aq) + Pb(s)

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Which of these redox reactions do you expect to occur spontaneously in the forward direction?
Standard Electrode Potentials at 25 °C
Reduction Half-Reaction
E° (V)
Ni2+(aq) + 2 e- ? Ni(s)
-0.23
Zn2+(aq) + 2 e- ? Zn(s)
-0.76
Cd2+(aq) + 2 e- ? Cd(s)
-0.40
Co2+(aq) + 2 e- ? Co(s)
-0.28
Pb2+(aq) + 2 e- ? Pb(s)
-0.13
Fe2+(aq) + 2 e- ? Fe(s)
-0.45
Al3+(aq) + 3 e- ? Al(s)
-1.66
Ag+(aq) + e- ? Ag(s)
0.80
Cr3+(aq) + 3 e- ? Cr(s)
-0.73
Mn2+(aq) + 2 e- ? Mn(s)
-1.18
Check all that apply.
Ni(s) + Zn2+(aq) ? Ni2+(aq) + Zn(s)
Fe2+(aq) + Cd(s) ? Fe(s) + Cd2+(aq)
Al(s) + 3 Ag+(aq) ? Al3+(aq) + 3 Ag(s)
Ni(s) + Pb2+(aq) ? Ni2+(aq) + Pb(s)

Added by William V.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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Solved by Expert Babita Kumari

Step 1

To do this, we will compare the standard electrode potentials (E°) of the given half-reactions. The half-reaction with a higher E° value will act as the reduction reaction, while the half-reaction with a lower E° value will act as the oxidation reaction. Show more…

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Which of these redox reactions do you expect to occur spontaneously in the forward direction? Standard Electrode Potentials at 25 °C Reduction Half-Reaction E° (V) Ni2+ (aq) + 2 e- → Ni(s) -0.23 Zn2+ (aq) + 2 e- → Zn(s) -0.76 Cd2+ (aq) + 2 e- → Cd(s) -0.40 Co2+ (aq) + 2 e- → Co(s) -0.28 Pb2+ (aq) + 2 e- → Pb(s) -0.13 Fe2+ (aq) + 2 e- → Fe(s) -0.45 Al3+ (aq) + 3 e- → Al(s) -1.66 Ag+ (aq) + e- → Ag(s) 0.80 Cr3+ (aq) + 3 e- → Cr(s) -0.73 Mn2+ (aq) + 2 e- → Mn(s) -1.18 Check all that apply: Ni(s) + Zn2+ (aq) → Ni2+ (aq) + Zn(s) Fe2+ (aq) + Cd(s) → Fe(s) + Cd2+ (aq) Al(s) + 3 Ag+ (aq) → Al3+ (aq) + 3 Ag(s) Ni(s) + Pb2+ (aq) → Ni2+ (aq) + Pb(s)

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