You were told to add the barium chloride reagent to your sulfate sample slowly, and to heat the samples for
several minutes to allow the precipitate of barium sulfate to digest. These procedures were intended to prevent the barium sulfate precipitate from occluding other ions. What error would be introduced if other ions were trapped within the crystals of barium sulfate as they formed?
Zumdahl, Steven S.; Zumdahl, Susan A.. Lab Manual for Zumdahl/Zumdahl’s Chemistry, 9th (Page 416). Cengage Textbook. Kindle Edition.