Question

Define colloidal system in term of physical chemistry

Answer 1

Colloidal system or colloidal dispersion is a heterogeneous system which is made up of Dispersed phase and Dispersion medium. In colloidal dispersion one substance is dispersed as very fine particles in another substance called dispersion medium. In case of dust, solid particles are dispersed in air as dispersion medium

Answer 2

The particles of a colloid are uniformly spread throughout the solution . Due to relatively smaller size of particles, as compared to that of a suspension, the mixture appears to be homogeneous. But actually, a colloidal solution is a heterogeneous mixture ,for example, milk . Because of the small size of colloidal particles, we cannot see them with naked eyes. But these particles can easily scatter a beam of visible light . Colloids are useful in industry and daily life. The particles are called the dispersed phase and the medium in which they are distributed is called the dispersion medium