LAB 5 (osmosis)

Brownian Movement- erratic movement of particles in a fluid, random course

• false

• true

used to test for Brownian Movement

• Carmine dye (red)

• Carbon dye (black)

Diffusion

• Particles in solution moves form area form less concentrated to highly concentrated, to achieve uniformness

• Particles in solution moves form area form highly concentrated to less concentrated, to achieve uniformness

Liquid to change to Gas

• Temperature change

• Pressure change

• Time change

Cause irregularities in the distribution of these molecules

• air current

• area size

• humanity (temp) (heat)

• size molecule

• All the above

Molecule dispersal to speed up

• smaller area

• heat

• smaller molecule

• All the above

How does molecular weight of the component affect the rate of diffusion?

• the bigger the molecule, the faster it will spread

• the smaller the molecule, the faster it will spread

Semipermeable membrane, selective permeable membrane

(ex- cell membrane)

• allows some particles to pass through and restricts the movement of others

• allows the passage of all particles

Passive transport

• certain substances can diffuse freely through them while expending energy of the cell

• certain substances can diffuse freely through them without any expenditure of energy by the cell

osmosis

• Movement of water molecules from a solution with a low concentration of water to a solution with a high concentration of water

  (solvent [high solute] to [low solute])

• Movement of water molecules from a solution with a high concentration of water to a solution with a low concentration of water

  (solvent [low solute] to [high solute])