Answer to Question #184717 in General Chemistry for Aich80

Question

"GALVANIC CELL"

Analyze each cell reaction. Identify and write the half-reaction that occurs in the anode and in the cathode. Calculate the standard cell potential and describe the reaction whether it is spontaneous or nonspontaneous.

1. Li (s) + F2 (g) = Li+ (aq) + 2F- (aq)

2. Au3+ (aq) + Co (s) = Au (s) + Co2+ (aq)

3. 2 Al (s) + 3 i2 = 2 Al+3 (aq) + 6 i-1 (aq)

4. F2 (g) + 2Cl-1 (aq) = 2F-1 (aq) + Cl2 (g)

Answer 1

2Li+F2=2LiF;                         Li(0)-1e->Li(+1); F2(0)+2e->2F(-);                        (F2 is an oxidizer; Li is a reductant);         (Non-spontaneous reaction);

2AuCl3+3Co=3CoCl2+2Au;              Au(+3)+3e->Au(0); Co(0)-2e->Co(+2);             (AuCl3 is an oxidizer; Co is a reductant);              (Spontaneous reaction);

2Al+3I2=2AlI3;   

Al(0)-3e->Al(+3); I2(0)+1e->2I(-1)                                             (I2 is an oxidizer; Al is a reductant);        (Non-spontaneous reaction);  

F2+2KCl=2KF+Cl2;  

F2(0)+1e->2F(-1); 2Cl(-1)-2->Cl2(0);                                       (F2 is an oxidizer, KCl is a reductant);            (Spontaneous reaction)