Consider a voltaic cell constructed from a Ag(s) anode in 1.0 M AgNO 3 and a Ni(
ID: 794909 • Letter: C
Question
Consider a voltaic cell constructed from a Ag(s) anode in 1.0 M AgNO3and a Ni(s) cathode in 1.0 M Ni(NO3)2, linked by an external circuit and by a KCl salt bridge. Which of the following is the balanced overall chemical equation for the cell reaction.
E. none of the above
Consider a voltaic cell constructed from a Ag(s) anode in 1.0 M AgNO3and a Ni(s) cathode in 1.0 M Ni(NO3)2, linked by an external circuit and by a KCl salt bridge. Which of the following is the balanced overall chemical equation for the cell reaction.Explanation / Answer
Ag(s) + Ni(s) ----> Ag+(aq) + Ni2+(aq) is the answer
Anode: Ag(s) ---> Ag(+1) (aq) + e- multiply by 2
Cathode: Ni(+2) (aq) ---> Ni(s)
Net ionic: 2Ag(s) + Ni(+2) (aq) + 2e- ---> 2Ag(+1) (aq) + 2e- + Ni(s)
Cancel out what you can:
2Ag(s) + 2Ni(+2) (aq) ---> 2Ag(+1) (aq) + Ni(s)
Overall reaction: 2Ag(s) + Ni(NO3)2 (aq) ---> 2AgNO3 (aq) + Ni (s)