(07) A 1.98 g sample mixture of BaCl2.2H20 (244.3 g/mol) and Na3PO4.12H20 (380.2 g/mol) was dissolved in 100 ml water, after filtration and drying off the resulting Ba3(PO.). (601.9 g/mol) precipitate, it weighed 0.60 g. If a drop of sodium phosphate solution added to the filtrate yielded a precipitate, what is the mass percent of the excess reactant in the sample mixture? 3 BaCl(aq) + 2 Na3PO4(aq) Baz(PO4)2 ( + 6 NaCl(aq) a) 38.3 % b) 61.7% c) 36.9% d) 63.1 % e) 90.0 %