試題詳解

3. Ten tablets with a total mass of 0.5894 g contained saccharin (C₇H₅NO₃S) and were dissolved in water. The saccharin was oxidized to convert all the sulfur to sulfate ion, which was precipitated by adding an excess of barium chloride solution. The mass of barium sulfate obtained was 0.5032 g. The average mass percent of saccharin in the tablets is thus_____. 
(A) 33.00%
(B) 0.052%
(C) 53.10%
(D) 95.95%
(E) 67.00%