A galvanic cell is based on the reaction 2 MnO4-(aq)+ 16 H+(aq)+5 Fe(s)5 Fe2+(aq

Question

A galvanic cell is based on the reaction

2 MnO4-(aq)+ 16 H+(aq)+5 Fe(s)5 Fe2+(aq)+2 Mn2+(aq)+8 H2O (l)

The cathode half reaction is

MnO4-(aq)+ 8 H+(aq)+5 e-(aq)Mn2+(aq)+4 H2O (l)

What is the anode half reaction?

(A)

5 Fe (s)5 Fe2+(aq)+10 e-

(B)

MnO4-(aq)+ 8 H+(aq)+5 Fe(s)5 Fe2+(aq)+ Mn2+(aq)+4 H2O (l)

(C)

Fe (s) Fe2+(aq)+2 e-

(D)

5 H2 (s)10 H++10 e-

A galvanic cell is based on the reaction

2 MnO4-(aq)+ 16 H+(aq)+5 Fe(s)5 Fe2+(aq)+2 Mn2+(aq)+8 H2O (l)

The cathode half reaction is

MnO4-(aq)+ 8 H+(aq)+5 e-(aq)Mn2+(aq)+4 H2O (l)

What is the anode half reaction?

(A)

5 Fe (s)5 Fe2+(aq)+10 e-

(B)

MnO4-(aq)+ 8 H+(aq)+5 Fe(s)5 Fe2+(aq)+ Mn2+(aq)+4 H2O (l)

(C)

Fe (s) Fe2+(aq)+2 e-

(D)

5 H2 (s)10 H++10 e-

Explanation / Answer

Answer:-

For the given cell reaction, the anode half reaction is given as follows,

(C). Fe(s) ---------> Fe2+(aq) + 2e-

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