Multiple Choice
Which term refers to the diffusion of water across a selectively permeable membrane?
14. Solutions
Osmosis
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What is the primary difference between diffusion and osmosis?
A
Diffusion requires a semi-permeable membrane, while osmosis does not.
B
Diffusion is a passive process, while osmosis requires energy.
C
Diffusion involves the movement of solute particles, while osmosis involves the movement of solvent particles.
D
Osmosis occurs in gases, while diffusion occurs in liquids.
Verified step by step guidance1
Understand the definitions: Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. Osmosis is a specific type of diffusion that involves the movement of solvent molecules through a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration.
Identify the key components: In diffusion, solute particles move freely in a medium (liquid or gas) without the need for a membrane. In osmosis, solvent particles (usually water) move across a semi-permeable membrane.
Clarify the role of the semi-permeable membrane: Osmosis requires a semi-permeable membrane that allows only certain molecules (typically the solvent) to pass through, while diffusion does not require such a membrane.
Consider the energy requirements: Both diffusion and osmosis are passive processes, meaning they do not require external energy input. They rely on the natural kinetic energy of particles.
Differentiate the environments: Diffusion can occur in both gases and liquids, whereas osmosis specifically involves the movement of solvent molecules in a liquid environment across a semi-permeable membrane.
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