Q Quadruple point, 116 Quintuple point, 234, 261 R Racemates, characterization of, 217, 282 Reactions, law of successive, 73 Reciprocal salt-pairs, 313 ---- ----, transition point of, 314 Rubidium tartrates, 265 S Salt hydrates, 85 ---- ----, indefiniteness of vapour pressure of, 87 ---- ---- with definite melting point, 145 Separation of salt on evaporation, 130 Silicates, hydrated, 176 Silver, lead, zinc, 246 Silver nitrate, solubility of, 114 ---- ---- and sodium nitrate, 190 Single salt interval, 278 Sodium ammonium tartrates, 266 ---- nitrate and silver nitrate, 190 ---- sulphate and water, equilibria between, 134 Sodium sulphate and water, vapour pressures of, 138, 140 ---- ----, anhydrous, dehydration by, 138 ---- ----, solubility of, 135 ---- ---- decahydrate, solubility of, 134 ---- ---- ----, transition point of, 136, 139 ---- ---- heptahydrate, solubility of, 136 ---- ---- ----, transition point of, 137 Solidus curve, 182 Solubility curve at higher temperatures, 114 ---- ----, form of, 108 ---- ---- of anhydrous salts, 111 ---- ----, retroflex, 146, 151, 162 ---- curves, interpolation and extrapolation of, 111 ---- ---- of three component systems, 264 ----, determination of transition points by, 335 ----, influence of pressure on, 107 ----, ---- of subdivision on, 10 ----, ---- of temperature on, 109 ---- of metastable forms, 47, 112, 137 Solubility of polymorphic forms, 112 ---- of salt hydrates, 133, 145 ---- of supercooled liquids, 125 ----, retrograde, 245 Solute, 93 Solution, definition of, 92 ----, heat of, 109, 110 ----, saturated, 106, 108 ----, supersaturated, 108 ---- temperature, critical, 98 ----, unsaturated, 108 Solutions, bivariant systems, 129 ----, congruently saturated, 279 ---- conjugate, 97, 241 {349} ----, incongruently saturated, 279, 289 ----, inevaporable, 157 ---- of gases in liquids, 93 ---- ---- in solids, 176 ---- of liquids in liquids (binary), 95 ---- ---- ---- (ternary), 240 ---- ----, influence of temperature on, 247 ---- of solids in liquids, 106 ---- ---- in solids, 180 ----, solid, 175, 180 ----, univariant systems, 127 Space model for carnallite, 284 Stability limit, 202 Steel, formation of, 223 Sublimation curve, 63 ---- ---- of ice, 24 ---- without fusion, 65 Succinic nitrile and water, 122 ---- ether, water, 252 Sulphur, 33, 34 ---- dioxide and water, 169 ---- ---- and potassium iodide, 158 ----, transition point of rhombic and monoclinic, 36 Supersaturation, 113, 114, 124 ----, limits of, 114 Systems, condensed, 36 ---- of one component, 21 ---- of two components, 76, 77, 207