# Last edited on 2017-05-04 03:09:28 by stolfi # Solubility data of NaOH:H2O # Source: Adeline Lach, Laurent André, Arnault Lassin, Mohamed Azaroual, Jean-Paul Serin, Pierre Cézac (2015): "A New Pitzer Parameterization for the Binary NaOH–H2O and Ternary NaOH–NaCl–H2O and NaOH–LiOH–H2O Systems up to NaOH Solid Salt Saturation, from 273.15 to 523.15 K and at Saturated Vapor Pressure". ''Journal of Solution Chemistry'', volume 44, issue 7, pages 1424–1451. {{doi|10.1007/s10953-015-0357-6}} # Critical points in the solubility diagram # Concentrations (X) are in mol/kg # Temperatures (T) are in celsius # a Experimental values of Pickering [10] # b Experimental values of Cohen-Adad et al. [39] # c Experimental values tabulated by Linke [41] Composition ! X(Calc) ! X(Ref) ! T(Calc) ! T(Ref) ! Ref -------------------------+---------+--------+---------+--------+---- NaOH·4 H2O + NaOH·3.5H2O | 11.728 | 11.750 | 4.54 | 4.70 | a | | 11.980 | | 5.10 | b | | 11.870 | | 5.00 | c NaOH·3.5H2O + NaOH·2H2O | 21.350 | 21.210 | 5.60 | 5.53 | a | | 22.170 | | 6.20 | b | | 20.870 | | 5.00 | c NaOH·3.5H2O + NaOH·H2O | 22.964 | 22.960 | 7.83 | 6.63 | a | | 23.545 | | 3.00 | b NaOH·2H2O + NaOH·H2O | 26.025 | 25.820 | 12.47 | 12.04 | a | | 25.500 | | 12.90 | b | | 27.700 | | 12.00 | c # Mean activity of NaOH in NaOH:H2O solutions # Concentrations (X) are in mol/kg # Temperatures (T) are in kelvin ! T ! ! ! ! ! ! ! ! ! -------------------------+--------+-------+-------+-------+-------+-------+--------+--------+--------+------- Concentration X | | 0.100 | 0.500 | 1.000 | 4.000 | 6.000 | 10.000 | 14.000 | 18.000 | 22.000 -------------------------+--------+-------+-------+-------+-------+-------+--------+--------+--------+------- This study | 273.15 | 0.784 | 0.686 | 0.662 | 0.884 | 1.363 | 4.289 | 11.232 | 22.927 | 42.836 Simonson et al. [14] | | 0.782 | 0.682 | 0.656 | 0.864 | 1.320 | | | | Holmes and Mesmer [39] | | 0.782 | 0.682 | 0.656 | 0.864 | | | | | Petrenko and Pitzer [15] | | | | | | 1.514 | 4.520 | 11.694 | 24.332 | 41.517 Christov and Møller [16] | | 0.773 | 0.672 | 0.658 | 0.970 | 1.491 | | | | Pabalan et Pitzer [13] | | 0.778 | 0.675 | 0.652 | 0.877 | 1.312 | 4.084 | | | This study | 298.15 | 0.778 | 0.687 | 0.673 | 0.918 | 1.315 | 3.234 | 8.208 | 15.792 | 22.989 Hamer and Wu [33] | | 0.775 | 0.685 | 0.674 | 0.911 | 1.302 | 3.258 | 8.083 | 15.570 | 23.030 Simonson et al. [14] | | 0.781 | 0.692 | 0.676 | 0.902 | 1.295 | | | | Holmes and Mesmer [39] | | 0.781 | 0.691 | 0.674 | 0.901 | | | | | Petrenko and Pitzer [15] | | | | | | 1.463 | 3.683 | 8.064 | 14.648 | 22.565 Christov and Møller [16] | | 0.768 | 0.667 | 0.652 | 0.925 | 1.342 | | | | Pabalan et Pitzer [13] | | 0.777 | 0.684 | 0.668 | 0.900 | 1.287 | 3.293 | | | This study | 323.15 | 0.769 | 0.676 | 0.661 | 0.875 | 1.185 | 2.399 | 4.848 | 8.251 | 11.560 Simonson et al. [14] | | 0.772 | 0.682 | 0.666 | 0.865 | 1.176 | | | | Holmes and Mesmer [39] | | 0.773 | 0.683 | 0.667 | 0.867 | | | | | Petrenko and Pitzer [15] | | | | | | 1.319 | 2.855 | 5.430 | 8.822 | 12.506 Christov and Møller [16] | | 0.759 | 0.654 | 0.635 | 0.856 | 1.177 | | | | Pabalan et Pitzer [13] | | 0.772 | 0.682 | 0.668 | 0.887 | 1.219 | 2.666 | - | - | This study | 373.15 | 0.743 | 0.633 | 0.604 | 0.700 | 0.865 | 1.422 | 2.308 | 3.310 | 4.112 Simonson et al. [14] | | 0.744 | 0.637 | 0.607 | 0.704 | 0.865 | | | | Holmes and Mesmer [39] | | 0.746 | 0.639 | 0.610 | 0.703 | | | | | Petrenko and Pitzer [15] | | | | | | 0.944 | 1.587 | 2.419 | 3.310 | 4.139 Christov and Møller [16] | | 0.730 | 0.606 | 0.572 | 0.671 | 0.838 | | | | Pabalan et Pitzer [13] | | 0.749 | 0.648 | 0.621 | 0.715 | 0.877 | 1.447 | | | This study | 423.15 | 0.707 | 0.575 | 0.528 | 0.522 | 0.587 | 0.803 | 1.086 | 1.353 | 1.550 Simonson et al. [14] | | 0.705 | 0.571 | 0.525 | 0.521 | 0.581 | | | | Holmes and Mesmer [39] | | 0.706 | 0.574 | 0.527 | 0.516 | | | | | Petrenko and Pitzer [15] | | | | | | 0.613 | 0.841 | 1.088 | 1.315 | 1.504 Christov and Møller [16] | | 0.690 | 0.539 | 0.486 | 0.478 | 0.545 | | | | Pabalan et Pitzer [13] | | 0.717 | 0.597 | 0.554 | 0.536 | 0.590 | 0.778 | | | This study | 473.15 | 0.659 | 0.502 | 0.441 | 0.365 | 0.373 | 0.422 | 0.486 | 0.546 | 0.594 Simonson et al. [14] | | 0.651 | 0.490 | 0.429 | 0.356 | 0.362 | | | | Holmes and Mesmer [39] | | 0.652 | 0.492 | 0.430 | 0.354 | | | | | Petrenko and Pitzer [15] | | | | | | 0.371 | 0.432 | 0.493 | 0.544 | 0.582 Christov and Møller [16] | | 0.638 | 0.458 | 0.388 | 0.309 | 0.323 | | | | Pabalan et Pitzer [13] | | 0.673 | 0.533 | 0.477 | 0.401 | 0.407 | 0.457 | - | - | - This study | 523.15 | 0.594 | 0.412 | 0.341 | 0.234 | 0.219 | 0.219 | 0.229 | 0.240 | 0.246 Simonson et al. [14] | | 0.578 | 0.393 | 0.322 | 0.219 | 0.205 | | | | Holmes and Mesmer [39] | | 0.578 | 0.393 | 0.322 | 0.220 | | | | | Petrenko and Pitzer [15] | | | | | | 0.208 | 0.211 | 0.219 | 0.225 | 0.229 Christov and Møller [16] | | 0.572 | 0.366 | 0.287 | 0.177 | 0.168 | | | | Pabalan et Pitzer [13] | | 0.610 | 0.445 | 0.380 | 0.279 | 0.265 | 0.264 | | |