By the addition of aqueous iodide lead ions can be precipitated from aqueous solutions: Pb2+(aq) + 2I (aq)---->PbI2 (s)
How many milliliters of 3.550M H I (aq) must be added to a solution containing .700 mol of Pb(NO3)2(aq) to completely precipice the lead. Lead iodide is virtually insoluble in water so that the reaction appears to go to completion.