CHAPTER VIII

SOLUTIONS OF SOLIDS IN LIQUIDS, ONLY ONE OF THE COMPONENTS BEING VOLATILE 133

B. HYDRATED SALT AND WATER, (1) _The compounds formed do not have a definite melting point._ Concentration-temperature diagram, 133. Sodium sulphate and water, 134. Suspended transformation, 137. Dehydration by means of anhydrous sodium sulphate, 138. Pressure-temperature diagram, 138. (2) _The compounds formed have a definite melting point._ Solubility curve of calcium chloride hexahydrate, 145. Pressure-temperature diagram, 149. The indifferent point, 150. The hydrates of ferric chloride, 151. Suspended transformation, 155. Evaporation of solutions at constant temperature, 155. Inevaporable solutions, 157. Illustration, 158.