Question

what do you mean by higher concerntration and lower concerntration

Answer 1

Concentration Gradient Defined. The formal definition of a concentration gradient is the process of particles, which are sometimes called solutes, moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles. The areas are typically separated by a membrane.

Answer 2

These are relative terms then concentration of solvent particle is more than it called higher concentration and when concentration of solvent particle is less than it is lower concentration