Diffusion Flashcards
What is diffusion?
Diffusion is the movement of PARTICLES from a high concentration area to a low concentration area within a SEMI-PERMABLE MEMBRANE, without the use of energy, to equalise the concentration gradient.
What is osmosis?
Movement of WATER (ONLY WATER WATER WATER) from a low concentration area to a high concentration area across a semi-mermeable membrane without the use of energy to EQUALISE the concentration gradient .
What occurs when the reaction reaches equilibrium?
As the reaction reaches equilibrium, there is NO NET MOVEMENT of molecules in either direction SOOOO they move in the same direction.
What does the rate of diffusion change depending on?
The rate of diffusion changes depending on the CONCENTRATION GRADIENT.
NOTE: click!!
CONCENTRATION IS DIFFERENT FROM VOLUME.
What happens when theres a greater difference in the concentration of substances?
If theres a greater difference in the concentration of substances, the concentration gradient will be STEEPER and diffusion will occur FASTER.
What can also make the process of diffusion faster?
HEAT.
What is a SOLVENT?
WATER.
Does osmosis require an energy input?
Osmosis does not recuqire an energy input.
What is the OSMOSIS GRADIENT?
The osmosis gradient occurs when the net diffusion of water occurs through a semi-permeable membrane from a DILUTED to a CONCENTRATED solution along its own concentration gradient.
What are two types of solution regarding concentrated and dilute ones?
HYPOtonic and HYPERtonic.
What moves the osmotic gradient?
Osmotic pressure.
What are HYPOtonic solutions?
Lack of kinetic energy: more solvent (WATER) than solute.
What are HYPERtonic solutions?
More concentrated solutions: more kinetic energy: low SOLVENT (water), more SOLUTE.
What are some differences between osmosis and diffusion?
Osmosis involves only water and diffusion involved liquids and gases.
Osmosis always requires a semi-permeable membrane, whereas diffusion does not recquire a semipermeable membrane.
