SOLUBILITY OF IRON(II) CARBONATE AT TEMPERATURES BETWEEN 30 AND 80-DEGREES

被引：20

作者：

BRAUN, RD

机构：

[1] Department of Chemistry, University of Southwestern Louisiana, Lafayette

来源：

TALANTA | 1991年 / 38卷 / 02期

关键词：

D O I：

10.1016/0039-9140(91)80131-I

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Measurements were made of the forward rate-constant (k(f)) for the dissolution of FeCO3 at 10-degrees temperature intervals between 30 and 80-degrees and in buffered solutions at pH 4, 5, 6 and 7. The solubility product (K(sp)) of FeCO3 was measured at the same six temperatures. The forward rate-constant is related to temperature (T, degree-C) and pH by pk(f) = pH - 0.0350T + 0.695. The solubility product of FeCO3 is related to temperature by pK(sp) = 0.0314T + 10.20. Kinetic data indicate that, under the conditions of the study, the rate-determining step of the dissolution reaction is FeCO3(s) + H+ --> Fe2+ + HCO3-.

引用

页码：205 / 211

页数：7

共 15 条

[1]

Bardy J, 1976, TRIB CEBEDEAU, V29, P75

[2]

BRAUN RD, 1982, APPLICATIONS CHEM AN, P131

[3] THERMODYNAMICS OF HYDROTHERMAL SYSTEMS AT ELEVATED TEMPERATURES AND PRESSURES [J].