Question

best describes how particles move by simple diffusion?
○ low concentration to high concentration
○ high concentration to low concentration
○ randomly, regardless of concentration levels
○ do not move unless the solution is homogeneous

Explanation:

Simple diffusion is the passive movement of particles (like molecules or ions) from an area of high concentration to an area of low concentration, driven by the concentration gradient, without the need for energy input. The first option is incorrect as it's the reverse of diffusion. The third option is incorrect because diffusion follows the concentration gradient, not random movement without regard to concentration. The fourth option is incorrect because particles in a non - homogeneous solution do move due to diffusion to reach equilibrium.

Answer:

B. high concentration to low concentration