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Solvation

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called aprotic. H-bond donor ability is classified on a scale (α). Protic solvents can solvate solutes that can accept hydrogen bonds. Similarly, solvents that can accept a hydrogen bond can solvate H-bond-donating solutes. The hydrogen bond acceptor ability of a solvent is classified on a scale (β). Solvents such as water can both donate and accept hydrogen bonds, making them excellent at solvating solutes that can donate or accept (or both) H-bonds.
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solvent molecules leads to a greater enthalpic penalty for cavity formation. Next, a particle of solute must separate from the bulk. This is enthalpically unfavorable since solute-solute interactions decrease, but when the solute particle enters the cavity, the resulting solvent-solute interactions are enthalpically favorable. Finally, as solute mixes into solvent, there is an entropy gain.
179:(or hydration shell in the case of water) around each particle of solute. The solvent molecules in the immediate vicinity of a solute particle often have a much different ordering than the rest of the solvent, and this area of differently ordered solvent molecules is called the cybotactic region. Water is the most common and well-studied polar solvent, but others exist, such as 272:) times the change in entropy. Gases have a negative entropy of solution, due to the decrease in gaseous volume as gas dissolves. Since their enthalpy of solution does not decrease too much with temperature, and their entropy of solution is negative and does not vary appreciably with temperature, most gases are less soluble at higher temperatures. 382:. Many host molecules have a hydrophobic pore that readily encapsulates a hydrophobic guest. These interactions can be used in applications such as drug delivery, such that a hydrophobic drug molecule can be delivered in a biological system without needing to covalently modify the drug in order to solubilize it. Binding constants for 175:
charge while the part with less electron density will experience a partial positive charge. Polar solvent molecules can solvate polar solutes and ions because they can orient the appropriate partially charged portion of the molecule towards the solute through electrostatic attraction. This stabilizes the system and creates a
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Strong solvent–solute interactions make the process of solvation more favorable. One way to compare how favorable the dissolution of a solute is in different solvents is to consider the free energy of transfer. The free energy of transfer quantifies the free energy difference between dilute solutions
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interact strongly with a solvent, and the strength and nature of this interaction influence many properties of the solute, including solubility, reactivity, and color, as well as influencing the properties of the solvent such as its viscosity and density. If the attractive forces between the solvent
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As computer power increased, it became possible to try and incorporate the effects of solvation within a simulation and the simplest way to do this is to surround the molecule being simulated with a "skin" of solvent molecules, akin to simulating the molecule within a drop of solvent if the skin is
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is the most important factor in determining how well it solvates a particular solute. Polar solvents have molecular dipoles, meaning that part of the solvent molecule has more electron density than another part of the molecule. The part with more electron density will experience a partial negative
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Solvation involves multiple steps with different energy consequences. First, a cavity must form in the solvent to make space for a solute. This is both entropically and enthalpically unfavorable, as solvent ordering increases and solvent-solvent interactions decrease. Stronger interactions among
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Hydrogen bonding among solvent and solute molecules depends on the ability of each to accept H-bonds, donate H-bonds, or both. Solvents that can donate H-bonds are referred to as protic, while solvents that do not contain a polarized bond to a hydrogen atom and cannot donate a hydrogen bond are
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at daylight (top row) and UV-light (second row) in different solvents. From left to right: 1. Water, 2. Methanol, 3. Ethanol, 4. Acetonitrile, 5. Dimethylformamide, 6. Acetone, 7. Ethylacetate, 8. Dichlormethane 9. n-Hexane, 10. Methyl-tert-Butylether, 11. Cyclohexane, 12. Toluene. Photographer:
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and solute particles are greater than the attractive forces holding the solute particles together, the solvent particles pull the solute particles apart and surround them. The surrounded solute particles then move away from the solid solute and out into the solution. Ions are surrounded by a
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Enthalpy of solvation can help explain why solvation occurs with some ionic lattices but not with others. The difference in energy between that which is necessary to release an ion from its lattice and the energy given off when it combines with a solvent molecule is called the
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Which of these forces are at play depends on the molecular structure and properties of the solvent and solute. The similarity or complementary character of these properties between solvent and solute determines how well a solute can be solvated by a particular solvent.
242:(multiplied by the absolute temperature) is a negative value, or that the Gibbs energy of the system decreases. A negative Gibbs energy indicates a spontaneous process but does not provide information about the rate of dissolution. 292:
that results when the ion dissolves. The introduction of entropy makes it harder to determine by calculation alone whether a substance will dissolve or not. A quantitative measure for solvation power of solvents is given by
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In general, thermodynamic analysis of solutions is done by modeling them as reactions. For example, if you add sodium chloride to water, the salt will dissociate into the ions sodium(+aq) and chloride(-aq). The
132:. The consideration of the units makes the distinction clearer. The typical unit for dissolution rate is mol/s. The units for solubility express a concentration: mass per volume (mg/mL), molarity (mol/L), etc. 358:
occurs spontaneously, in part because of a favorable change in the interactions between the protein and the surrounding water molecules. Folded proteins are stabilized by 5-10 kcal/mol relative to the
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Due to the importance of the effects of solvation on the structure of macromolecules, early computer simulations which attempted to model their behaviors without including the effects of solvent (
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Jiang D.; Urakawa A.; Yulikov M.; Mallat T.; Jeschke G.; Baiker A. (2009). "Size selectivity of a copper metal-organic framework and origin of catalytic activity in epoxide alcoholysis".
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value means that solvation will not occur. It is possible that an ion will dissolve even if it has a positive enthalpy value. The extra energy required comes from the increase in
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Recent simulation studies have shown that the variation in solvation energy between the ions and the surrounding water molecules underlies the mechanism of the
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and proteins, in aqueous solutions influences the formation of heterogeneous assemblies, which may be responsible for biological function. As another example,
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of a solute in two different solvents. This value essentially allows for comparison of solvation energies without including solute-solute interactions.
563: 109:. The concept of the solvation interaction can also be applied to an insoluble material, for example, solvation of functional groups on a surface of 86: 642:
Taft R. W., Kamlet M. J. (1976). "The solvatochromic comparison method. 1. The .beta.-scale of solvent hydrogen-bond acceptor (HBA) basicities".
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of the solution is decreased, compared to the Gibbs energy of the separated solvent and solid (or gas or liquid). This means that the change in
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Taft R. W., Kamlet M. J. (1976). "The solvatochromic comparison method. 2. The .alpha.-scale of solvent hydrogen-bond donor (HBD) acidities".
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is the solution enthalpy minus the enthalpy of the separate systems, whereas the entropy of solution is the corresponding difference in
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Bonn Mischa; et al. (2012). "Interfacial Water Facilitates Energy Transfer by Inducing Extended Vibrations in Membrane Lipids".
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M. Andreev; J. de Pablo; A. Chremos; J. F. Douglas (2018). "Influence of Ion Solvation on the Properties of Electrolyte Solutions".
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of a solution depends on the solvation of its ions. Nonpolar solvents cannot solvate ions, and ions will be found as ion pairs.
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The van der Waals forces, which consist of dipole–dipole, dipole–induced dipole, and induced dipole–induced dipole interactions.
58:. Solvation is the process of reorganizing solvent and solute molecules into solvation complexes and involves bond formation, 602: 548: 516: 696:
M. Andreev; A. Chremos; J. de Pablo; J. F. Douglas (2017). "Coarse-Grained Model of the Dynamics of Electrolyte Solutions".
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side chains exposed to water by burying them in the center of a folded protein is a driving force related to solvation.
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value for the enthalpy change of solution corresponds to an ion that is likely to dissolve, whereas a high
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Eric V. Anslyn; Dennis A. Dougherty (2006). Modern Physical Organic Chemistry. University Science Books.
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and intramolecular electrostatic interactions which would be dampened in the presence of a solvent.
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for this dissociation can be predicted by the change in Gibbs energy of this reaction.
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include conformational or isomeric preferences and changes in the acidity of a solute.
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and solvation, including entropy effects related to changes in the solvent structure.
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Gutmann V (1976). "Solvent effects on the reactivities of organometallic compounds".
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Steed, J. W. and Atwood, J. L. (2013) Supramolecular Chemistry. 2nd ed. Wiley.
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Although early thinking was that a higher ratio of a cation's ion charge to
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The solvation process will be thermodynamically favored only if the overall
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Hydration affects electronic and vibrational properties of biomolecules.
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Association of molecules of a solvent with molecules or ions of a solute
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One example of a solvated MOF, where partial dissolution is described.
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is used to estimate Gibbs free energy of solvation of a gaseous ion.
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stronger intramolecular interactions in the folded protein structure
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Solvation involves different types of intermolecular interactions:
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process and is quantified by its rate. Solubility quantifies the
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by solvent molecules. Solvated species can often be described by
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state achieved when the rate of dissolution equals the rate of
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definition, solvation is an interaction of a solute with the
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Molecular modelling : principles and applications
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Pace, CN; Shirley, BA; McNutt, M; Gajiwala, K (1996).
66:. Solvation of a solute by water is called hydration. 586: 1405:
List of boiling and freezing information of solvents
1054: 1056:"Transfer Free Energy and the Hydrophobic Effect" 531: 226:Solvation energy and thermodynamic considerations 1457: 853: 341: 199:. Polar solvents are often found to have a high 393:Importance of solvation in computer simulations 80: 1100: 986: 166:Armin KĂĽbelbeck, CC-BY-SA, Wikimedia Commons 902: 733:"Polyelectrolyte association and solvation" 467: 465: 73:compounds depends on a competition between 1107: 1093: 363:due to a combination of solvation and the 916: 879: 805: 764: 668: 462: 157: 136:Solvents and intermolecular interactions 116:Solvation is, in concept, distinct from 30:A sodium ion solvated by water molecules 25: 1052: 994:(3 vol. ed.). Amsterdam: Elsevier. 506: 386:depend on the polarity of the solvent. 1458: 1114: 854:Mashaghi Alireza; et al. (2012). 1088: 947: 214:Some chemical compounds experience 13: 980: 731:A. Chremos; J. F. Douglas (2018). 569:Compendium of Chemical Terminology 264:. The solvation energy (change in 14: 1482: 1080: 992:The Chemical Physics of Solvation 249: 120:. Solvation or dissolution is a 990:; et al., eds. (1985–88). 941: 896: 847: 830: 781: 737:The Journal of Chemical Physics 724: 37:describes the interaction of a 1053:Serafin, J.M. (October 2003). 689: 662: 635: 608: 557: 525: 509:Chemistry - California Edition 500: 1: 1025:Chemistry: A European Journal 683:10.1016/S0010-8545(00)82045-7 455: 342:Macromolecules and assemblies 1395:Inorganic nonaqueous solvent 7: 807:10.1096/fasebj.10.1.8566551 416: 405:; this is due to favorable 371:. Minimizing the number of 278:enthalpy change of solution 81:Distinction from solubility 56:concentric shell of solvent 10: 1487: 1380:Acid dissociation constant 407:van der Waals interactions 18: 1363: 1295: 1225: 1122: 948:Leach, Andrew R. (2001). 537:Chemistry of the Elements 535:; Earnshaw, Alan (1997). 346:Solvation (specifically, 710:10.1021/acs.jpcb.7b04297 486:10.1021/acs.jpcb.8b00518 19:Not to be confused with 1345:Solubility table (data) 1212:Apparent molar property 582:10.1351/goldbook.S05747 380:host–guest complexation 378:Solvation also affects 147:Ion–dipole interactions 1310:Total dissolved solids 1305:Solubility equilibrium 1230:and related quantities 1037:10.1002/chem.200901510 507:Cambell, Neil (2006). 434:Solubility equilibrium 167: 31: 1410:Partition coefficient 1390:Polar aprotic solvent 541:Butterworth-Heinemann 533:Greenwood, Norman N. 161: 29: 1325:Enthalpy of solution 1252:Volume concentration 1247:Number concentration 384:host–guest complexes 322:equilibrium constant 258:enthalpy of solution 238:minus the change in 64:van der Waals forces 1237:Molar concentration 1207:Dilution (equation) 872:2012JChPh.136k4709M 749:2018JChPh.149p3305C 656:10.1021/ja00418a009 629:10.1021/ja00426a036 413:sufficiently deep. 201:dielectric constant 126:dynamic equilibrium 107:stability constants 103:coordination number 1471:Chemical processes 1277:Isotopic abundance 1242:Mass concentration 1116:Chemical solutions 1073:10.1021/ed080p1194 429:Saturated solution 197:dimethyl sulfoxide 168: 111:ion-exchange resin 105:, and the complex 32: 1453: 1452: 1067:(10): 1194–1196. 927:10.1021/jp302478a 911:(22): 6455–6460. 881:10.1063/1.3694280 757:10.1063/1.5030530 704:(34): 8195–8202. 623:(10): 2886–2894. 603:978-1-891389-31-3 550:978-0-08-037941-8 518:978-0-13-201304-8 480:(14): 4029–4034. 336:Hofmeister series 266:Gibbs free energy 1478: 1350:Solubility chart 1177:Phase separation 1137:Aqueous solution 1109: 1102: 1095: 1086: 1085: 1076: 1058: 1048: 1031:(45): 12255–62. 995: 988:Dogonadze, Revaz 974: 973: 945: 939: 938: 920: 900: 894: 893: 883: 851: 845: 844:, 9781118681503. 834: 828: 827: 809: 785: 779: 778: 768: 728: 722: 721: 698:J. Phys. Chem. B 693: 687: 686: 671:Coord. Chem. Rev 666: 660: 659: 644:J. Am. Chem. Soc 639: 633: 632: 617:J. Am. Chem. Soc 612: 606: 595: 584: 561: 555: 554: 539:(2nd ed.). 529: 523: 522: 504: 498: 497: 474:J. Phys. Chem. B 469: 369:hydrogen bonding 253: 144:Hydrogen bonding 60:hydrogen bonding 45:molecules. Both 1486: 1485: 1481: 1480: 1479: 1477: 1476: 1475: 1456: 1455: 1454: 1449: 1359: 1320:Solvation shell 1291: 1229: 1221: 1217:Miscibility gap 1202:Serial dilution 1197:Supersaturation 1147:Buffer solution 1118: 1113: 1083: 983: 981:Further reading 978: 977: 962: 946: 942: 918:10.1.1.709.5345 901: 897: 852: 848: 835: 831: 786: 782: 729: 725: 694: 690: 667: 663: 640: 636: 613: 609: 596: 587: 562: 558: 551: 543:. p. 823. 530: 526: 519: 505: 501: 470: 463: 458: 453: 444:Supersaturation 419: 395: 356:protein folding 344: 228: 220:solvent effects 216:solvatochromism 177:solvation shell 138: 83: 24: 17: 12: 11: 5: 1484: 1474: 1473: 1468: 1451: 1450: 1448: 1447: 1442: 1437: 1432: 1427: 1422: 1417: 1412: 1407: 1402: 1397: 1392: 1387: 1385:Protic solvent 1382: 1377: 1369: 1367: 1361: 1360: 1358: 1357: 1352: 1347: 1342: 1337: 1332: 1330:Lattice energy 1327: 1322: 1317: 1312: 1307: 1301: 1299: 1293: 1292: 1290: 1289: 1284: 1279: 1274: 1269: 1264: 1259: 1254: 1249: 1244: 1239: 1233: 1231: 1223: 1222: 1220: 1219: 1214: 1209: 1204: 1199: 1194: 1189: 1184: 1182:Eutectic point 1179: 1174: 1169: 1164: 1159: 1154: 1149: 1144: 1142:Solid solution 1139: 1134: 1132:Ideal solution 1128: 1126: 1120: 1119: 1112: 1111: 1104: 1097: 1089: 1082: 1081:External links 1079: 1078: 1077: 1050: 1020: 982: 979: 976: 975: 960: 940: 895: 866:(11): 114709. 846: 829: 780: 743:(16): 163305. 723: 688: 661: 650:(2): 377–383. 634: 607: 585: 556: 549: 524: 517: 499: 460: 459: 457: 454: 452: 451: 446: 441: 439:Solvent models 436: 431: 426: 420: 418: 415: 394: 391: 361:unfolded state 343: 340: 227: 224: 152: 151: 148: 145: 137: 134: 82: 79: 75:lattice energy 69:Solubility of 49:and uncharged 15: 9: 6: 4: 3: 2: 1483: 1472: 1469: 1467: 1464: 1463: 1461: 1446: 1443: 1441: 1438: 1436: 1433: 1431: 1428: 1426: 1423: 1421: 1418: 1416: 1413: 1411: 1408: 1406: 1403: 1401: 1398: 1396: 1393: 1391: 1388: 1386: 1383: 1381: 1378: 1375: 1371: 1370: 1368: 1366: 1362: 1356: 1353: 1351: 1348: 1346: 1343: 1341: 1338: 1336: 1333: 1331: 1328: 1326: 1323: 1321: 1318: 1316: 1313: 1311: 1308: 1306: 1303: 1302: 1300: 1298: 1294: 1288: 1285: 1283: 1280: 1278: 1275: 1273: 1272:Mass fraction 1270: 1268: 1267:Mole fraction 1265: 1263: 1260: 1258: 1255: 1253: 1250: 1248: 1245: 1243: 1240: 1238: 1235: 1234: 1232: 1228: 1227:Concentration 1224: 1218: 1215: 1213: 1210: 1208: 1205: 1203: 1200: 1198: 1195: 1193: 1190: 1188: 1185: 1183: 1180: 1178: 1175: 1173: 1172:Phase diagram 1170: 1168: 1165: 1163: 1160: 1158: 1155: 1153: 1152:Flory–Huggins 1150: 1148: 1145: 1143: 1140: 1138: 1135: 1133: 1130: 1129: 1127: 1125: 1121: 1117: 1110: 1105: 1103: 1098: 1096: 1091: 1090: 1087: 1074: 1070: 1066: 1062: 1061:J. Chem. Educ 1057: 1051: 1046: 1042: 1038: 1034: 1030: 1026: 1021: 1018: 1017:0-444-42984-0 1014: 1010: 1009:0-444-42674-4 1006: 1002: 1001:0-444-42551-9 998: 993: 989: 985: 984: 971: 967: 963: 961:0-582-38210-6 957: 953: 952: 944: 936: 932: 928: 924: 919: 914: 910: 906: 899: 891: 887: 882: 877: 873: 869: 865: 861: 860:J. Chem. Phys 857: 850: 843: 839: 833: 825: 821: 817: 813: 808: 803: 799: 795: 794:FASEB Journal 791: 784: 776: 772: 767: 762: 758: 754: 750: 746: 742: 738: 734: 727: 719: 715: 711: 707: 703: 699: 692: 684: 680: 676: 672: 665: 657: 653: 649: 645: 638: 630: 626: 622: 618: 611: 604: 600: 594: 592: 590: 583: 579: 575: 571: 570: 565: 560: 552: 546: 542: 538: 534: 528: 520: 514: 510: 503: 495: 491: 487: 483: 479: 475: 468: 466: 461: 450: 447: 445: 442: 440: 437: 435: 432: 430: 427: 425: 424:Born equation 422: 421: 414: 410: 408: 404: 400: 390: 387: 385: 381: 376: 374: 370: 366: 362: 357: 353: 349: 339: 337: 332: 330: 329:Born equation 325: 323: 317: 313: 311: 307: 303: 298: 296: 295:donor numbers 291: 287: 283: 279: 273: 271: 267: 263: 259: 254: 252: 247: 243: 241: 237: 233: 223: 221: 217: 212: 208: 206: 202: 198: 194: 190: 186: 182: 178: 173: 164: 160: 156: 149: 146: 143: 142: 141: 133: 131: 130:precipitation 127: 123: 119: 114: 112: 108: 104: 100: 96: 92: 88: 78: 76: 72: 67: 65: 61: 57: 52: 48: 44: 40: 36: 28: 22: 1399: 1335:Raoult's law 1314: 1287:Ternary plot 1282:Mixing ratio 1064: 1060: 1028: 1024: 1019:(Chemistry). 991: 950: 943: 908: 904: 898: 863: 859: 849: 832: 800:(1): 75–83. 797: 793: 783: 740: 736: 726: 701: 697: 691: 674: 670: 664: 647: 643: 637: 620: 616: 610: 567: 559: 536: 527: 508: 502: 477: 473: 411: 402: 398: 396: 388: 377: 367:, including 345: 333: 326: 318: 314: 302:ionic radius 299: 274: 255: 248: 244: 232:Gibbs energy 229: 213: 209: 205:conductivity 193:acetonitrile 169: 153: 139: 115: 84: 68: 34: 33: 1440:Lyonium ion 1355:Miscibility 1340:Henry's law 905:J Phys Chem 449:Water model 373:hydrophobic 306:lanthanides 1460:Categories 1435:Amphiphile 1430:Lipophilic 1425:Hydrophile 1420:Hydrophobe 1297:Solubility 1192:Saturation 1162:Suspension 1011:(part B), 1003:(part A), 842:1118681509 677:(2): 225. 456:References 118:solubility 1466:Solutions 1445:Lyate ion 1400:Solvation 1315:Solvation 1257:Normality 913:CiteSeerX 574:solvation 348:hydration 310:actinides 99:complexed 51:molecules 43:dissolved 35:Solvation 21:salvation 1415:Polarity 1374:Category 1262:Molality 1124:Solution 1045:19806616 970:45008511 935:22594454 890:22443792 824:20021399 775:30384680 718:28816050 494:29611710 417:See also 403:in vacuo 399:in vacuo 286:positive 282:negative 236:enthalpy 185:methanol 172:polarity 170:Solvent 163:Nile red 95:solution 1365:Solvent 1167:Colloid 1157:Mixture 868:Bibcode 816:8566551 766:6217855 745:Bibcode 290:entropy 262:entropy 240:entropy 189:acetone 181:ethanol 122:kinetic 91:solvent 47:ionized 39:solvent 1043:  1015:  1007:  999:  968:  958:  933:  915:  888:  840:  822:  814:  773:  763:  716:  601:  547:  515:  492:  270:Kelvin 195:, and 85:By an 62:, and 1187:Alloy 820:S2CID 564:IUPAC 87:IUPAC 71:solid 41:with 1041:PMID 1013:ISBN 1005:ISBN 997:ISBN 966:OCLC 956:ISBN 931:PMID 886:PMID 838:ISBN 812:PMID 771:PMID 714:PMID 599:ISBN 545:ISBN 513:ISBN 490:PMID 327:The 308:and 280:. 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Index

salvation

solvent
dissolved
ionized
molecules
concentric shell of solvent
hydrogen bonding
van der Waals forces
solid
lattice energy
IUPAC
solvent
solution
complexed
coordination number
stability constants
ion-exchange resin
solubility
kinetic
dynamic equilibrium
precipitation

Nile red
polarity
solvation shell
ethanol
methanol
acetone
acetonitrile

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