Solubility product of amorphous magnesium carbonate

被引：14

作者：

Chang, Chun-Yu ^{[1
]}

Yang, Sheng-Yu ^{[1
]}

Chan, Jerry C. C. ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, 1,Sect 4,Roosevelt Rd, Taipei 106, Taiwan

来源：

JOURNAL OF THE CHINESE CHEMICAL SOCIETY | 2021年 / 68卷 / 03期

关键词：

AMC; NMR; PHREEQC;

D O I：

10.1002/jccs.202000527

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The thermodynamic solubility product of amorphous magnesium carbonate (AMC) was studied at room temperature. The samples had been prepared at pH 8.78 and 9.37, where the particle size was 58 +/- 11 nm and 49 +/- 9 nm, respectively. Solid-state NMR measurements showed that the former contained a minute amount of bicarbonate species, whereas we did not detect any for the latter. While the AMC sample prepared at higher pH exhibited a one-step decomposition at 413 degrees C, the one at lower pH decomposed in two steps at 425 and 510 degrees C. The solubility products of AMC prepared at two pH are statistically identical and the average value is estimated to be 6.3 x 10(-6).

引用

页码：476 / 481

页数：6

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