Saturation of Refractive Index of Nacl Solution Beyond its Saturation Limit

Abstract

Refractive index of NaCl solution of 1,2,3,4,5,10 and 15.5 molal concentration were obtained at room temperature (26°C). It was found that saturation limit of NaCl solution at room temperature is 6.2 molal concentration. Graph of refractive index against concentration revealed that refractive index of medium increases with increase in NaCl concentration up to saturation limit of solution. Beyond saturation limit Refractive index of NaCl solution was found to be almost constant.