*

Standards addressed:

BIOLOGY Cell biological 1. A. Students know cells room enclosed within semipermeable membranes that manage their communication with your surroundings.

You are watching: Is distilled water hypertonic or hypotonic

SEVENTH great LIFE scientific research Cell biology 1. A. Students recognize cells role similarly in every living organisms. 1. B. Students understand the attributes that differentiate plant cell from pet cells, consisting of chloroplasts and also cell walls.

under normal problems with a microscope.

Observation of plasmolysis once the sheet is flooded with 6%

salt water.

Further observations when the plant leaf is rehydrated

with distilled water.

See more: How Do I Know If The Salt Nano3 Is Nano3 Acidic Basic Or Neutral

Materials:

microscopic lense Elodea in aquarium water Slides and also Cover slips Distilled water 6% NaCl equipment (salt water) file towels or tissues

Procedure:

Prepare a wet mount of one sheet from the water plant Elodea making use of the water in which that is kept. watch the cells under normal conditions, and also make a map out of what friend see. if observing the sheet under the microscope, wick a systems of 6% NaCl (sodium chloride) across the slide. Sketch your observations. V the same leaf, try wicking distilled water across the slide. Document your observations.

Study Guide:

PLASMOLYSIS IN ELODEA CELLS

Questions:

to compare the ar of chloroplast in normal and also plasmolyzed cells. What to be the reason for the adjust in the ar of the chloroplasts in the two solutions? walk the Elodea cell change shape? Why or why not? define the location of the chloroplasts once the plasmolyzed cell was flooded with distilled water? What to be the cause for the readjust seen with distilled water?


This video shows the Elodea gift "rehydrated" through distilled water. Notice that the cell wall surface has no changed.
*

The an approach of "wicking" is provided to attract a solution throughout the specimen top top a slide. By placing a item of organization or file towel in ~ one leaf (right) and also dropping the systems at the edge of the other side (left), the equipment is attracted or "wicked" throughout the specimen.


*

This snapshot shows plasmolyzed Elodea after ~ the slide had actually been soaked with salt solution. Notification that the chloroplasts have all clumped into the middle. This demonstrates the effect on a hypertonic solution on life cells.
*

This picture shows typical Elodea. The chloroplasts are spread throughout the cell both prior to the salt solution, and also after the distilled water is put onto the slide. Distilled water to represent a hypotonic solution, yet the cells carry out not burst since of the cabinet wall.

References & Links: