Thermodynamic investigation of the ternary mixed electrolyte (NaCl + Na2HCit + H2O) system using potentiometric measurements at T = (298.2 and 308.2) K
作者： Bahram Ghalami-Choobar , Mojgan Shafaghat-Lonbar
DOI: 10.1016/J.JCT.2014.06.007
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摘要: Abstract In this work, the mean activity coefficients of NaCl in (NaCl + Na2HCit + H2O) ternary mixed electrolyte system were determined using potentiometric method. The measurements carried out on galvanic cell without liquid junction type: Na-ISE/NaCl (m1), Na2HCit (m2), H2O/Ag–AgCl over total ionic strengths from (0.01 to 4.000) mol · kg−1. Different series salt molal ratios r (r = mNaCl/ m Na 2 HCit = 0.1, 1, 2.5, 5.0, 7.5, 10.0) and pure used for measurement at T = (298.2 308.2) K P = 0.1 MPa. results interpreted by Pitzer ion-interaction model with higher-order electrostatic effects. mixing parameters obtained calculate values Na2HCit, osmotic coefficients, solvent excess Gibbs free energies whole studied system.
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