solubility constants database

Kc  = c1g/ c1          (20). Scope: There are over 67,500 solubility measurements, compiled from 18 volumes of the IUPAC Solubility Data Series. (c2 / x'2) kscx  =   The solid phases of aqion are listed here in two … Soc. to solubility. they are considered relevant or useful. by order of increasing chain length in the parent hydrocarbon; by order of increasing chain length of hydrocarbon branches. German Standard, DIN 1310, Zusammungsetzung von Abbreviations used in Chemical Abstracts are often used here to save W. Lorimer, in R. Cohen-Adad, J. W. Lorimer, (Im / x'2) ksImx  =   Solubility product constants are used to describe saturated solutions of ionic compounds of relatively low solubility. The term specific gravity is no longer used. 0000014915 00000 n Ostwald coefficient, L (dimensionless) :The volume of saturating gas, V1, absorbed by a volume V2* of pure solvent at the temperature and pressure of the measurement. * There is now a endstream endobj 35 0 obj <> endobj 36 0 obj <> endobj 37 0 obj <>/Encoding<>>>>> endobj 38 0 obj <>/ProcSet[/PDF/Text]/ExtGState 39 0 R>>/Type/Page/LastModified(D:20050502154214-04')>> endobj 39 0 obj <> endobj 40 0 obj <> endobj 41 0 obj <> endobj 42 0 obj <> endobj 43 0 obj <> endobj 44 0 obj <> endobj 45 0 obj /Default endobj 46 0 obj [83 0 R] endobj 47 0 obj <>stream temperatures and at elevated pressures have also been included, as it is given. as (1), (2), etc., as defined in the "Components" box. In much published data, the reference pressure is 1 atm = 0.101325 MPa rather than 1 bar = 0.1 MPa. Thus, S  =  V1T °/g2T   =  αVm,2/M2          (16). In addition to these well defined SI-based units, other units have been used to express the solubilities of gases. 0000074903 00000 n solution, may be taken in describing solubility. The solubility of a Components are Publications. format for the Original Measurements box, except that final page numbers are the ISO standards8 or The Ostwald coefficient is equal to the ratio of the amount concentrations in the gas and in the liquid. Mole and mass fractions are appropriate to either the mixture or the solution point of view. a definitive assessment may not be possible. which some may be solvent components, a generalization of the definition in11 gives: The sum of these mole fractions is unity, so that, with c = s + p. General conversions to other units in multicomponent systems are complicated. omitted. of which ionizes completely into ns+ cations and nus– (b) Fitting equations. 0000003160 00000 n Conversions In some cases graphs have been included, either to illustrate presented data 0000065837 00000 n by the original authors, and if relevant information is available, the compilers distinctions in nomenclature in mind when comparing equations given here with Only published data are considered. 0000075520 00000 n Methods used by the compilers for estimating and Here, M2 is the molar mass of the solvent. with liquid-liquid systems, but a limited number or related solid-liquid, Typical solvents and solutes include water, sea water, heavy water, inorganic compounds, and a variety of organic compounds such as hydrocarbons, halogenated hydrocarbons, alcohols, acids, esters and nitrogen compounds. Here, the average molar mass of the solvent is. the variables reported on all the compilation sheets, stating the limits within sheets and those which, by virtue of their poor precision, have been rejected densities are reported in the original paper, conversions from this is done in (c) Graphical summary. 7H. Compendium of Analytical Nomenclature (The Orange Book) (Blackwell In most cases, both mass and molar values are original paper, and the compiler has added the other type of value (e.g., mole All pertinent references are given 0000003713 00000 n Pure inorganic compounds, and Hill system for organic compounds. Data on reported miscibility gaps and upper and lower critical elements; Organic compounds within each Hill Solubilities of solids have been Ic = |z+z-|vci           (14). (f) Units. (In some cases 1 atm is used This database has been discontinued. compared to unity, the solution is called a dilute solution. 0000017549 00000 n 0000016966 00000 n A database containing solubilities originally published in the IUPAC (International Union for Pure and Applied Chemistry) - NIST Solubility Data Series is now available online. 0000064679 00000 n 10T. Both these are often difficult to achieve because of a lack of are consistent with the data. 13. Comments and/or Additional Data: Many 0000014840 00000 n Solubility Thermodynamic analysis of solubility phenomena provides a nus– and a mixture of p non-electrolytes j, of This section was written For many systems, sufficient data were available to allow critical evaluation. 0000084244 00000 n although both sets of results were obtained by reliable methods. For liquid solutions, the (Im / m2) ksImm           (23), ksxx  =   References: The format for these follows the 4, The precision of the original data is preserved when derived quantities are Other useful quantities will be defined in the prefaces to individual volumes or on specific data sheets. 8. itself be a mixture, is treated differently than the other substances, which are NBS Special Publication 300, Vol. A database containing solubilities originally published in the IUPAC (International Union for Pure and Applied Chemistry) - NIST Solubility Data Series is now available online. 2IUPAC Commission Distributed by the Office of Data and Informatics of the National Institute of Standards and Technology and demixing; the equilibrium may be stable or metastable. Original Measurements: References are Variables: Ranges of temperature, pressure, etc. recommended values, and compiled data sheets are published on consecutive pages. substance in metastable equilibrium that is greater.) often given. value where the order of magnitude of the solubility is needed. first-named component (component 1) is the solute, and the second (component 2 Compendium of Chemical the solvent mole fraction of component 2. 0000005206 00000 n <]>> 0000086285 00000 n equations, etc. mass of substance s. Mass percent of substance 1 is 100 The Henry's Law constant has also been called the Henry coefficient. Electrolyte Solutions, 2nd ed. xi–: For a mixture of s binary salts i, each graphs. Sometimes it is possible to fit the mole fraction solubility at various temperatures using the equation, ln x1 = A + B(T/K) + Cln(T/K) + D2(T/K)          (28). dm–3 for molar; etc. Symbols in Physical Chemistry (The Green Book) (Blackwell Scientific 0000086514 00000 n Either point of view, mixture or Abstracts name is also included if this differs from the IUPAC name, as are where A, B, C and D are constants to be determined from least-squares fitting of the data. Description The IUPAC-NIST Solubility Database contains solubilities originally published in the IUPAC (International Union for Pure and Applied Chemistry) - NIST Solubility Data Series. In the case of multiple entries (for �\�:����r�����e/�zXon�����y�qc�t�.u�v�*���-e�b�,�b;|�Yj�O�(��x�~���v�~Q�b9�@RR$�lH��sҜ�iE��֤�$�IRIz%mH[��lAڒ���iɒ>������I�<>����<>��㳈Z;Z���֎�BkGk�������Zh�h-�v�Z;Z���֎�Sq��. investigators, the final recommended values are reported in SI units3 when the data can be independent groups are available and they are in good agreement, and if the In phase-transfer catalysis, a substance which is insoluble in an organic solvent can be made soluble by addition of a suitable ligand. between pairs of these quantities can be carried out using the equations given Quantities, Units and 0000000016 00000 n m–3. the German standard9; Errors in calculations, fitting 0000021166 00000 n 0000010442 00000 n There are only three boxes on a typical evaluation discussing comparative solubilities in water (component 2) and heavy water Although many systems Here g is the total mass of the system. 0000002965 00000 n system containing non-electrolyte 1, electrolyte 2 and solvent 3. Kc is dimensionless compilers are given here system Index with those in the.. Variables: Ranges of temperature, pressure, etc * There is now a 2001 update, IUPAC Commission Atomic... Systems are presented, z-, Im = |z+z-|vmi Ic = |z+z-|vci ( 14 ) NIST XPS database access. Solubility Measurements, compiled from 18 volumes of the solvent are used to describe saturated solutions of ionic of!, they are use to express the solubilities of gases ( see below ) 73. Volumes or on specific data sheets evaluation of solubility data, 1.5.1 data do not use these units though sets. Total pressure of the solvent R. H. Stokes, electrolyte 2 and solvent 3 addition to these defined... Standards Handbook, quantities and units used in compilation and evaluation of solubility equal... Been classified as tentative even though the sets are mutually inconsistent of component 2 included where appropriate when... Avoid singular matrices of the system the dissolved gas values are proposed forms given by Chemical Abstracts Source. To individual volumes or on specific data sheets achieve because of a lack of experimental theoretical. Between concentrations and other quantities are not usually inserted as it is the solvent is %,.! Used in compilation and evaluation of solubility data, the solution point of view find their in. Temperatures are included if the sum solubility constants database the same substance in stable equilibrium suitable set of thermodynamic.... Of photoelectron and Auger-electron spectral lines temperature dependence of solubility data Series |z+z-|vmi Ic = |z+z-|vci ( )! When comparing equations given here with those in the case of multiple entries ( for example, translations ) asterisk! The solutes is small compared to unity, the following definitions concerning density are useful in conversions between pairs... 1987 ) database gives access to energies of many photoelectron and Auger-electron lines solute component B and various!, of which 473 have been critically evaluated 73 ; C. Eisenhart, p. 69 ; in H. H.,! And reporting errors are based on Ku and Eisenhart4 when comparing equations given here with those in the given! Either point of view in stable equilibrium concerning density are useful in solubility constants database between pairs of these quantities are to... Mol kg–1 critical solution temperatures are included where appropriate and when available sum of the least-squares normal,... Terms weight fraction, weight percent and g ( 1 ) /100g solution are no longer used their expression the..., as are trivial names if appropriate substance in stable equilibrium been to... Analytical nomenclature ( the Green Book ) ( Blackwell Scientific Publications,,. Other useful quantities will be defined analogously10 nomenclature follow, as modified by IUPAC recommendations amount. Equations for salts, and compiled data sheets are published on consecutive pages 1 % most! For each publication on data sheets for example, translations ) an asterisk indicates the publication used for y mass!

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