VAPOUR PRESSURES OF AQUEOUS SOLUTIONS

A new method has been devised to determine the vapour pressure of liquids and solutions. Compared lo other methods this method has been found to be simple, rapid and to yield accurate and reproducible results. Observed values of vapour pressures of aqueous solutions of ZnCl₂, Ca(CNS)₂, Zn(CNS)₂ and H₃PO₄ are recorded. From thermo­dynamical considerations osmotic pressures of these solutions have been calculated. Experimental results suggest a strong affinity between water and these salts which is in agreement with the properties of these substances.