Osmosis and celery lab experiment Essay

Diffusion is simply the net movement of atoms or molecules from a region of blueer tightness to a region of lower concentration. The force behind the movement is heat or kinetic energy (also called Brownian motion). Diffusion occurs when you spill piddle on the carpet scandalize and it spreads out, or when you open a bottle of perfume and it leaves the bottle and spreads by dint ofout the air in the room. Osmosis is a similar phenomenon that moves piss from a region of high piddle supply concentration to a region of low water concentration. Imagine that a cell from your body is placed in a solution of water. If the concentration of the water wrong the cell is the same as the concentration of water in the solution, then we describe the water solution as being isosmotic or having the same concentration as the water inside the cell.In this case, net movement of water result be zero and the cell give not swell or shrink. In other words, the same arrive of water volition move in the cells as will move out. On the other hand, if the cell is placed in a solution of water that has a higher concentration (of water) compared to the concentration of water inside the cell, then osmosis will ca expenditure more than water to move into the cell than will move out and this will cause the cell to swell. In this case, we say that the solution of water is hypotonic. Now imagine that the cell is placed in a solution of water that has a lower concentration (of water) compared to the concentration of water inside the cell. In this case osmosis will cause more water to move out of the cell than will move in the cell and the cell will shrink. In this case, we say that the solution is hypertonic. Learn more about osmosis and diffusion from Chapter 3 of your textbook.CELERY EXPERIMENTWe can place cultivated celery in triad different water solutions to observe the effects of osmosis on the celery stalks. Salt will serve as our solute to mix with water to make the water e ither hypotonic, hypertonic or isotonic. The hypotonic solution will accommodate slight salt so that the amount of water compared to salt will be greater than the amount of water inside the cells (compared to the salt and other solutes inside the cell.) The hypertonic solution will contain more salt so that the amount of water compared to thesalt will be less than the amount of water inside the cells (compared to the salt and other solutes inside the cell.) The isotonic solution will contain an amount of salt that will be similar to the amount of salt and other solutes inside the cells of the celery.Materialsknifemeasuring cup and spoontwo stalks of celery (they should be fresh and firm, not bend like rubber) table saltthree containers with lids (or something to cover the containers) to hold the solutions and the celery stalks filtered or soft water, distilled water kit and boodle best, tap water will work if it the mineral content is not too high (tap water with high mineral con tent is called hard water)Procedures1. bring down four pieces of celery that are each two inches long (be sure they are all the same length)2. make four vertical slices or cuts into the celery but make the cuts only three fourths of the length or 1.5 inches space the vertical cuts as evenly apart as possible3. label the three containers A, B and C4. add one cup of water to each container5. add NO salt to container A6. add teaspoon of salt to container B and stir well7. add 2 teaspoons of salt to container C and stir well8. place one of your 2 inch cut pieces of celery into each of the three containers and keep the fourth piece as a control for comparison9. cover the three containers with the lid or cover that you are using, you could use a cling plastic swan as well10. wrap the fourth control celery piece tightly in plastic wrap11. leave the celery pieces in the three containers and the fourth wrapped (control) piece for 6 hours or overnight at room temperature12. remove the piec es from the containers and bend them plot of land observing how firm or flexible they are13. record your observations of each of the four pieces of celery belowObservationsSolutionFlexibility compared to the control stalk (less flexible, similar, more flexible) More water moved into or out of the cells?Indicate which solution was isotonic, hypotonic, and hypertonicAWhen the celery stalk was placed in solution A. The water moved through and in the cells of the celery which is an example of osmosis. Water moves through the cells. The stalk was firm and less flexible.More water moved into the celerys cells. The celery stalk was nice and firm after the allotted time.More water and less to no solute, is an example of hypotonic solution. Which means there is less osmotic pressure.BIn solution B the celery became a little more flimsy. Solution has a little salt.Slightly less water moved into the celerys cells. The reason the water didnt move as freely through the cells is due to the small amount of solute.This is an example of hypertonic, or greater osmotic pressure. This solution has a higher concentration of solute than the hypotonic solution.CIn solution C the salt/ solute is very present. The celery became very flimsy after 4 hours. Even less water moving into cells.The celery became very flexible and very flimsy. The water was not moving through the cells even at a higher rate. This solution is a full example of osmosis. In osmosis the solute is of greater concentration of the solute. The diffusion of pure solvent crosswise a membrane in response to a concentration gradient,