Question

Given reduction potentials, like ag+(aq) + e- --> ag(s) and ni2+(aq) + 2e- -->ni(s)

In an electrochemical cell which uses nickel (Ni) and silver (Ag), which metal will be oxidized? Ni or Ag?

Answer 1

i think its nickel but not sure, please help!

Answer 2

for an electrochemical cell which uses silver (Ag) and lead (Pb), will ag be reduced?

Answer 3

Look up the oxidation potential of Ag and Ni (they will be the negative of the reduction potential).The one with the higher oxidation potential will be oxidized and the other will be reduced.
Do the same for Pb and Ag.

It's been awhile since I've looked at an activity series table but I believe you will find Ni to oxidize Ag ion and Pb to oxidize Ag ion but you should confirm that..