Lead Ions Can Be Precipitated from Aqueous Solutions by the Addition

Lead ions can be precipitated from aqueous solutions by the addition of aqueous iodide:

Lead iodide is virtually insoluble in water so that the reaction appears to go to completion. How many milliliters of 3.550 M HI(aq) must be added to a solution containing 0.700 mol of Pb(NO₃) ₂ (aq) to completely precipitate the lead?

A) 0.197
B) 0.394
C) 394
D) 197
E) 2.54 × 10^{- 3}