webmaster Posted November 9, 2004 Share Posted November 9, 2004 From: Michael C. Adams Subject: Phosphate Data Dear GWB Users, I am using React to design a pH buffer for some high-temperature experiments. The pH that I get at 75 to 275 C are quite different depending on whether I use the Thermo.dat or the V8.r6+ (LLNL) database. The reactions and their constants vary quite a bit, especially at the 200-300 C. Does anyone have opinions on which is the database to use for this model? The input data follows: swap H2PO4- for H+ balance on Na+ K+=0.005489 molal Na+=0.002688 molal H2PO4-=0.005489 molal HPO4--=0.001344 molal SiO2(aq)=1.0e-7 molal react 100 moles Quartz, cuttoff = 1 kg T initial = 20, final = 300 Quote Link to comment Share on other sites More sharing options...
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