need help with both questions. please explain. 96 4. What is the reduction half-

Question

need help with both questions. please explain.

96 4. What is the reduction half-reaction for the following overall cell reaction? NF"(aq) + 2 Ag(s) Ni(s) + 2 Ag(a) Answer (A) (B) (C) (D) Ag(s) + e- Ag-(aq) Ag+(aq) + e- Ag(s) Ni2 (aq) + 2 e- Ni(s) N (aq) + e- Ni(s) 5. For the galvanic cell reaction, expressed below using shorthand notation, what half-reaction occurs at the anode? Zn(s) | Zn2(aq) Il Ni2(aq) I Ni(s) (A) Zn2+(aq) + 2 e- Zn(s) (B) Zn(s)- Zn'(aq) + 2 e- (C) Ni(s) Ni2+(aq) + 2 e- (D) Ni2+(aq) + 2 e- Ni(s)

Explanation / Answer

Reduction Half Reaction

Reduction half reaction contains the compound/element which gets reduced in the reaction. Ni is gettinf redued from the state of +2 to 0

Hence the reduction half reaction is

Ni(+2)(aq) + 2e- -------------- Ni(s)

Hence the correct answer is Option C

5)

Oxidation Half reaction

Zn(s) ----- Zn(+2)(aq) + 2e-

Reduction Half Reaction

Ni(+2)(aq) + 2e- ------ Ni(s)

The correct answers are B and D

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