1. Elodea cells normally contain about 1% salt and 99% water. Tap water normally contains about 1% salt and 99% water. The salt solution you used contains 6% salt and 94% water.

2. Tap WaterSalt Water

3. Tap WaterSalt Water Were the salt water cells in a isotonic, hypertonic, or hypotonic solution? Hypertonic

4. Tap Water Salt Water Why did the membranes of the salt water cells collapse? There was a higher concentration of water inside of the cell than outside, so water moved by osmosis out of the cell. The membranes collapsed because they had less water inflating them.

5. Tap Water Salt Water Were the tap water cells in a isotonic, hypertonic, or hypotonic solution? Isotonic

6. Tap Water Salt Water What is happening to the water in the cells in tap water? The water concentration is in equilibrium. Water molecules are entering and leaving the cells at about an equal rate.

7. Tap Water Salt Water Which cells will lose weight? Salt water Which cells will stay about the same weight? Tap water