Experimental determination of solubilities of tri-calcium di-citrate tetrahydrate [Ca-3[C3H5O(COO)(3)](2)center dot 4H(2)O], earlandite, in NaCl and MgCl2 solutions to high ionic strengths

摘要

In this study, solubility measurements on tri-calcium di-citrate tetrahydrate [Ca-3[C3H5O(COO)(3)](2)center dot 4H(2)O, abbreviated as Ca-3[Citrate](2)center dot 4H(2)O, earlandite] as a function of ionic strength are conducted in NaCl solutions up to I = 5.0 mol kg(-1) and in MgCl2 solutions up to I = 7.5 mol kg(-1), at room temperature (22.5 +/- 0.5 degrees C). The solubility constant (logKsp0) for Ca-3[Citrate](2)center dot 4H(2)O and formation constant (log beta 10) for Ca[C3H5O(COO)(3)],