Which reaction could be used to generate electricity in a voltaic electrochemical cell? which reaction could be used to generate electricity in a voltaic electrochemical cell? zn2+(aq)+sn(s)→sn2+(aq)+zn(s) cu2+(aq)+zn(s)→zn2+(aq)+cu(s) nacl(aq)+agno3(aq)→agcl(s)+nano3(aq) none of the above?