Sulfuric acid, H 2 SO 4 (aq), contains sulfate ions. These would react with barium ions in the test, giving an incorrect positive result. Explain why, in a test for halide ions, the sample is ...

Less often, an alkyl or aryl halide is treated with a carboxylate salt ... which was converted to vinyl acetate and acetic acid using a sulfuric acid catalyst. Previously, in 1935, Erich Rabald at C.