A voltaic cell operating under standard conditions (1.0 M ion concentrations) utilizes the following reaction: 3 Pb(s) + 2 Co3+(aq) <=> 3 Pb2+(aq) + 2 Co(s) What is the effect on the cell emf of each of the following changes? 1) The size of the lead electrode is increased. A) The negative cell emf drops, becoming more negative. B) No change in cell emf occurs.