Answer to Question #113941 in Physical Chemistry for DEEPAK SINGH

Question

difine molecular refraction.briefly describe the principle construction and working of the instrument used in determinning the molecular refraction of a liquid.

Answer 1

Molecular refraction -characteristics of polarized molecules in the visible region of the spectrum.

The instrument used in determinning the molecular refraction of a liquid is called refractometer.

When light enters a liquid it changes direction; this is called refraction. Refractometers measure the degree to which the light changes direction, called the angle of refraction. A refractometer takes the refraction angles and correlates them to refractive index (nD) values that have been established. Using these values, you can determine the concentrations of solutions.