“…Standardized NaOH(aq) {concentration c = (2.00 2 0.02) mol·dm −3 , M = 0.039997 kg·mol −1 } was obtained from Fisher Scientific; the vendor stated that, based upon turbidity measurements, the mole fraction n'(carbonate)/n(NaOH) in this solution was Q0.01, where n'(carbonate) is {n(CO The mass fractions of water in the reagents and in the toluene solutions were measured with a Metrohm Model 633 automatic Karl Fischer titrator as previously described. (8) The molalities of n-propylgallate and gallic acid were determined with a Hewlett-Packard 1090 high-performance liquid chromatograph (h.p.l.c.) equipped −3 , pH = 4.65)} and methanol.…”