In Order to Determine the Identity of a Particular Transition

question 87

Multiple Choice

In order to determine the identity of a particular transition metal (M) ,a voltaic cell is constructed at 25°C with the anode consisting of the transition metal as the electrode immersed in a solution of 0.0977 M M(NO₃) ₂,and the cathode consisting of a copper electrode immersed in a 0.0724M Cu(NO₃) ₂ solution.The two half-reactions are as follows:
M(s) M²⁺(aq) + 2e^-
Cu²⁺(aq) + 2e^- Cu(s)
The potential measured across the cell is 1.13 V.What is the identity of the metal M?
Reduction Half-Reaction
E° (V)
Cu²⁺(aq) + 2e^- Cu(s) +0.34
Ni²⁺(aq) + 2e^- Ni(s) -0.23
Cd²⁺(aq) + 2e^- Cd(s) - 0.40
Zn²⁺(aq) + 2e^- Zn(s) -0.76
Mn²⁺(aq) + 2e^- Mn(s) -1.18

• A)Zn
• B)Ni
• C)Cu
• D)Cd
• E)Mn

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