THE EFFECT OF ETHANOL ON THE SOLUBILITY OF DICALCIUM PHOSPHATE DIHYDRATE IN THE SYSTEM CA(OH)2-H3PO4-H2O AT 37-DEGREES-C

Authors
TUNG MS OFARRELL TJ
Citation
Ms. Tung et Tj. Ofarrell, THE EFFECT OF ETHANOL ON THE SOLUBILITY OF DICALCIUM PHOSPHATE DIHYDRATE IN THE SYSTEM CA(OH)2-H3PO4-H2O AT 37-DEGREES-C, Journal of molecular liquids, 56, 1993, pp. 237-243
Citations number
16
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Journal of molecular liquids → ACNP
ISSN journal
01677322
Volume
56
Year of publication
1993
Pages
237 - 243
Database
ISI
SICI code
0167-7322(1993)56:<237:TEOEOT>2.0.ZU;2-H
Abstract
Solubility values of dicalcium phosphate dihydrate were determined in 0, 7.86, 16.04, 24.53, and 33.38% by weight ethanol-water mixtures at 37-degrees-C. The decreased the solubility of DCPD, expressed as solub ility product (K(sp)), from pK(sp)=6.69 at 0% ethanol to 8.91 at 33.38 % ethanol, mainly due to the decrease in the dielectric constant. The data were fitted to the simple Born equation as follows: pK(sp) - 6.69 = 575.2(1/epsilon - 0.0135).