“…Acids. The most extensively used solvent for titrations in this class of compounds is acetic acid (51,61,85,92,108,129,163,165,166,169,199,203,207,223,224,277,278,289,309,310,313,316, 322) and its mixtures with acetic anhydride (97,134,173,312), chloroform (206,287), formic acid (51), haloacetic acids (56,89), sulfuric acid (204), BF3 (235), acetonitrile (156,165), ketones (245,246), alcohol (241), and benzene (190). A review containing much useful information on the solvent properties of anhydrous acetic acid has been published (238).…”