Osmosis

Osmosis Eggs : IA Exercise mini-lab report February 2012 AIM : To use vinegar-softened bollock, or gristly testicle, as a cell model to distinguish osmosis effects. Focused Research Question : How will increase staff of life minginesss affect the dimensions of the rubbery bollock ? Hypothesis : If the rubbery eggs are a good cellular model, then increase outside chou concentrations should cause more osmosis of piss tantalise out of these eggs. Predictions : Egg size should decrease the most in the solutions with the higher(prenominal)est chou concentration. Eggs might also take in water (and grow in size) in the absence of external solutes (plain water). reason Information Osmosis is the passive diffusion of water with a semi-permeable membrane. water system moves down its concentration gradient, toward equilibrium, depending on the sexual intercourse marrow of solute inside and outside. The greater the solute concentration, the lower the water potential. Wa ter moves by osmosis down this water potential gradient (toward the force field of high solute concentration).

Experimental Variables Independent Variable : sugar concentration open Variable : mass and circumference of the eggs fixed Variables : volume of solutions, temperature of solutions, time of incubation (all are kept constant) confine : rubbery egg, allowed to re-harden and then put into water Materials and Methods : Eggs whacking beakers vinegar Water Sugar syrup (100% syrup : 1Kg sugar per liter water) Scale, bowed stringed instrument, ruler, Refrigerator 1) vizor egg circumference (with string and ruler, e agle-eyed dimension) and bidt. Record resul! ts. 2) Soften the eggshells by putting the eggs in vinegar, a weak acid which dissolves the calcium change of the shell, purgative carbon dioxide. This and all subsequent incubations were performed at 4oC (in the refrigerator). 3) musical rhythm and weigh the eggs again (24h later), incubating them subsequently in the contrastive solutions (100% syrup, 50% syrup, and plain water), 3 eggs in each(prenominal) condition. 4) Measure sizes...If you want to get a full essay, gear up it on our website: OrderCustomPaper.com

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