BaCl2 + Na2SO4 ↔BaSO4 + NaCl-Gravimetric Determination of Sulfate1) A procedure similar to the described in this experiment could be used to precipitate Cl- as PbCl2. Of a sample containing chloride weighing 0.846 grams was precipitated with Pb+2 and the PbCl2. produced weighed1.367 grams, what is the % (by mass) of Cl- in the sample.