exam extras

• hypOtonic 


  high concentration of water outside

  low concentration of water in cell
• hypertonic 


  high concentration of water in cell

  low concentration of water outside of cell
• substances involved 


  diffusion: dissolved solutes

  osmosis: water

  active transport: dissolved solute
• osmosis experiment 1


  P has a higher concentration of sucrose which means it has a lower water concentration

  Q has a lower concentration which means it has a higher water concentration

  Osmosis occurs water moves form Q to P
• osmosis experiment 2


  Water tubing expands in size

  water diffuses through visiting tubing as the size of water molecule is smaller than the pores of visking tubing

  sucrose molecule cannot diffuse out as the size of sucrose molecule is bigger than the pores of visking tubing
• osmosis why doesn’t the sugar move?

  sugar does not move as its molecules are too big to pass through the membrane

  reaching eq (same concentration)