When 38. 0 ml of 0. 1250 m h2so4 is added to 100. Ml of a solution of pb(no3)2, a precipitate of pbso4 forms. The pbso4 is then filtered from the solution, dried, and weighed. If the recovered pbso4 is found to have a mass of 0. 0471 g, what was the concentration of nitrate ions in the original solution?.