1.  Cells and Osmosis

2. Permeable -
allowing liquids or gases to pass through it

3.  Cells and Osmosis
Can you explain: 1)  Making tea with a tea bag 2)  Air freshener/diffuser 3)  Smelling perfume
These examples spread through space/water.

4.  Cells and Osmosis
I have an egg here that has been soaking in vinegar for two days. What do you notice?
I’m going to find the mass of this egg. Who wants to help?
What do you think will happen if I soak the egg in kyro syrup?
Vinegar
Kyro Syrup
Water

5.  Cells and Osmosis
Click here!

6.  Cells and Osmosis
Osmosis is the diffusion of water through a semi-permeable membrane.
Semipermeable means that only certain substances can pass through.
The presence of a solute (sugar, salt, etc.) decreases the water potential of a substance.

7.  Cells and Osmosis

8. Cells and Osmosis Which way will the water flow? (DRAW ME!)

9.  Cells and Diffusion

10.  Cells and Diffusion
Hypertonic solutions are those in which more solute (lower water potential) is present.
Hypotonic solutions are those with less solute (higher water potential).
Isotonic solutions have equal (iso-) concentrations of substances. Water potentials are equal; although there will still be equal amounts of water movement in and out of the cell, the net flow is zero.

11.  Cells and Diffusion
Cells placed in distilled water (hypotonic solution) take on water, swell and burst.
In a salt solution (hypertonic solution), cells lose water and shrink.