Abstract
The volume change of aqueous solutions on freezing was measured for various alkali metal and alkaline earth metal salts. For sodium salts without the influence of anion species, sodium salts showed almost the same pattern, i.e., the change was smaller than that of water, and it became smaller with the increase in the concentration of sodium salts. For potassium salts the change did not show the same pattern according to the influence of anion species. With the increase in the concentration of potassium salts, the change for KCl became lager, the change for KNO_3 was constant, and the change for K_2CO_3 became smaller. For magnesium and calcium salts the changes did not show the same pattern according to the influence of anion species, too, and all the changes became smaller with the increase in the concentration of salts. When the changes dependent on cation species in the same anions were compared, the biggest was for potassium, next for sodium, and the smallest were for calcium and magnesium.
