Set up an appointment to demonstrate osmosis
Answers
Answered by
0
Edit
Place three eggs in a beaker, cover them with acid and weigh them down so they don't float above the surface.Allow them to remain in the acid until the shells completely dissolve.Then place each of the eggs in a different liquid:Place one in waterPlace one in an isotonic sucrose solution, [about 0.3M]Place one in a 1M sucrose solutionLeave overnight.The next day remove the eggs and compare their size.
You will find that the egg in water will have swollen considerably. If you carefully pierce the membrane with a needle a jet of water will shoot into the air. The egg in an isotonic solution will be approximately the same size, while the egg in 1M solution will have shrunk.
Demonstrating Osmosis with Potato SlicesEdit
There are a number of variations on this demonstration. Potato slices can be used, as also can raw potato 'chips' (English) or 'French fries' (North American) Consistency of sample can be ensured by using a commercial potato chipper, or by using a cork borer of selected diameter. Other vegetables or fruit may, of course, be used. The changing dependent variable may be weight or length.
Place three eggs in a beaker, cover them with acid and weigh them down so they don't float above the surface.Allow them to remain in the acid until the shells completely dissolve.Then place each of the eggs in a different liquid:Place one in waterPlace one in an isotonic sucrose solution, [about 0.3M]Place one in a 1M sucrose solutionLeave overnight.The next day remove the eggs and compare their size.
You will find that the egg in water will have swollen considerably. If you carefully pierce the membrane with a needle a jet of water will shoot into the air. The egg in an isotonic solution will be approximately the same size, while the egg in 1M solution will have shrunk.
Demonstrating Osmosis with Potato SlicesEdit
There are a number of variations on this demonstration. Potato slices can be used, as also can raw potato 'chips' (English) or 'French fries' (North American) Consistency of sample can be ensured by using a commercial potato chipper, or by using a cork borer of selected diameter. Other vegetables or fruit may, of course, be used. The changing dependent variable may be weight or length.
Similar questions