Which factor does NOT affect the rate of diffusion?

The rate of diffusion is influenced by several factors, but the type of solute does not specifically alter the intrinsic process of diffusion itself in the same way that the other factors do.

Temperature plays a significant role in diffusion; as temperature increases, the kinetic energy of molecules also rises, leading to faster movement and, consequently, a higher rate of diffusion.

Molecular weight is another crucial factor; lighter molecules tend to diffuse more quickly than heavier ones, which can slow down the diffusion process due to their greater mass.

The concentration gradient, which refers to the difference in concentration between two areas, is fundamental to diffusion. A steeper gradient facilitates a quicker movement of particles from an area of higher concentration to one of lower concentration.

In contrast, while the type of solute may affect characteristics such as solubility or interaction with other molecules, it does not change the basic principles governing the rate of diffusion like the other factors mentioned. Thus, understanding these distinctions helps clarify why the type of solute does not influence the rate of diffusion in the same significant way.