Experimental evidences are presented to support the necessity of precipitating barium sulfate by the addition of the sulfate to barium chloride rather than in the reverse order as is usually recommended. Factors such as loss due to creeping of the precipitate, temperature and time of digestion, heating of the barium sulfate to constant weight, and others were very carefully controlled. Data are given showing the results obtained using potassium, sodium, ammonium, and hydrogen sulfates. An explanation is offered why the results are low when the usual order of precipitation (BaCl2 to the sulfate) is followed. Microphotographs of barium sulfate obtained by different methods and under varying conditions are given.
Proceedings of the Iowa Academy of Science
©1929 Iowa Academy of Science, Inc.
Popoff, Stephen and Neuman, E. W.
"The Precise Determination of Sulfates,"
Proceedings of the Iowa Academy of Science, 36(1), 261-261.
Available at: https://scholarworks.uni.edu/pias/vol36/iss1/46