Curtis P

Attached please find my calculations of log K for ulexite and searlesite. I'm troubled by the fact that Ulexite log K is higher than that of Borax even though it is less soluble. Some solubility data is present for Ulexite. Checking log K calculated from delta G of reaction against a K calculated from solubility does not yield good agreement. I feel like I am overlooking something. Haven't found any solubility data on searlesite so nothing to check against. Data are yours to use if you'd like however I am still seeking correction or confirmation. Happy modeling! Curtis P Ulexite Calcs K.docx

Update: I re-worked my solubility equation. Simplified K expression leads to much larger K 2.29E -6. Getting closer to "reasonable" I think. Ulexite is describe as sparingly soluble. Still looking for confirmation on the K's of ulexite, searlesite, and I'd like to add colemanite for thoroughness. Thanks for any help.

Is anyone willing to share K's or log K for dissolution of ulexite and searlesite? I calculated a K of 9.44E-15 for ulexite from some molar solubility data. Seems un-reasonably small. Wanting some confirmation before I get too far. Thx in advance