4.1.3.2 Osmosis

Question 1

What is osmosis?

Answer 1

• the movement of water molecules across a partially permeable membrane from an area of higher water concentration to an area of lower water concentration
• passive movement of water particles

Question 2

What is a partially permeable membrane?

Answer 2

• membrane with very small holes in it

Question 3

What is the only substance that can pass through a partially permeable membrane?

Answer 3

• water

Question 4

How do the water molecules move?

Answer 4

• randomly
• pass both ways through the membrane

Question 5

What does more water molecules on one side mean?

Answer 5

• there is a steady net flow of water into the region with fewer water molecules

Question 6

What does a steady net flow of water mean?

Answer 6

• the strong sugar solution gets more dilute