Question

What is Diffusion? List 3 factors that increase the rate of diffusion

Answer 1

diffusion: diffusion is the net movement of particles(atoms ,ions, molecules, ) from a region of higher concentration to a region of lower concentration.

it continues until the concentration of substances is uniform throughout.

factors that affect rate of diffusion:

• mass of the molecule: lighter molecules move more faster than heavier molecules.
• area and thickness of the membrane: area of the membrane increases ,rate of diffusion also increases.......increasing thickness slows the diffusion rate...
• temperature: temperature increases as this increases the random collision between molecules and increases diffusion rate.
• distance of solute path : shorter paths of travel imply faster rates of molecular diffusion .
• solvent properties: viscosity and density greatly effect diffusion...if the medium has very viscous and dense in the particles harder time to diffusing through it, so the rate of diffusion will be slow...... if the medium is less dense and viscous ,than the particles will move quickly and will diffuse faster,so the rate of diffusion is fast.