ChemInform Abstract: Complex Formation of Beryllium(II) with Salicylate and Hydroxide Ions in 1 mol dm‐3 Sodium Perchlorate Aqueous Solution at 25 °C

Abstract

The complex formation of Be2+ with salicylate (L2–) and hydroxide ions was investigated at 25 °C in 1 mol dm–3 NaClO4 by potentiometry using a glass electrode. The e.m.f. measurements were performed under the conditions 2.7 ⩽–log [H+]⩽ 8, 0.002 ⩽cM⩽ 0.01 mol dm–3, 0.002 ⩽cL⩽ 0.015 mol dm–3, and 1 ⩽cL/cM⩽ 7, where cM, and cL, denote the total concentrations of BeII and salicylic acid, respectively. The e.m.f. data were explained with the three major species [Be(HL)L]–, [BeL], and [BeL2]2– and at least one or even all of the four minor species [Be(HL)]+, [Be(HL)2], [Be(OH)L]–, and [Be3(OH)3L3]3–. The hydrolytic reactions of BeII in 1 mol dm–3 NaClO4, data on which were used for the analysis of the above beryllium(II)–salicylate-hydroxide system, were also studied by separate potentiometric titrations. It was found that [Be2(OH)]3+, [Be3(OH)3]3+ and [Be6(OH)8]4+ occur in 1 mol dm–3 NaClO4 aqueous solution.