Consider an electrochemical cell constructed from thefoloowing half cells, linked by an external circuit and by a KClsalt bridge: an Al(s) electrode in 1.0 M Al(NO3)3 solution a Pb(s) electrode in 1.0 M Pb(NO3)2solution What is the balanced overall (net) cell reaction? Consider an electrochemical cell constructed from thefoloowing half cells, linked by an external circuit and by a KClsalt bridge: an Al(s) electrode in 1.0 M Al(NO3)3 solution a Pb(s) electrode in 1.0 M Pb(NO3)2solution What is the balanced overall (net) cell reaction?
Explanation / Answer
Pb2+ has a more positive electrode potentialcompared to Al, therefore, it is a stronger oxidizing agent and itcauses Aluminum give up electrons and accept electronsitself. { Al(s)---> Al3+ +3e-}x2 { Pb2+ + 2e----> Pb(s) }x3 therefore the net reaction is 3Pb2+(aq)+ 2Al(s) ----> 3Pb(s) + 2Al3+(aq) Hope that helps