Question

potassium iodide reacts with lead (II) nitrate in this precipitation reaction: 2KI (aq) + Pb(NO3)2 (aq) --> 2KNO3 (aq) +PbI2 (s)

what minimum volume of 0.200M potassium iodide solution is required to completely precipitate all of the lead in 155.0mL of a 0.112M lead (II) nitrate solution?