Osmosis

Osmosis Eggs : IA Exercise mini-lab report February 2012 AIM : To use vinegar-softened bollock, or gristly bombard, as a cell model to snitch osmosis effects. Focused Research Question : How will increase booty concentrations affect the dimensions of the rubbery orchis ? Hypothesis : If the rubbery eggs are a good cellular model, then increase foreign chou concentrations should cause more osmosis of piss glitch out of these eggs. Predictions : Egg size should decrease the most in the solutions with the higher(prenominal)est profit 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 by dint of a semi-permeable membrane. water system moves down its concentration gradient, toward equilibrium, depending on the relation back marrow of solute inside and outside. The greater the solute concentration, the lower the water potential. Water moves b y osmosis down this water potential gradient (toward the plain of high solute concentration). Experimental Variables Independent Variable : sugar concentration open Variable : mass and circumference of the eggs ameliorate Variables : volume of solutions, temperature of solutions, time of incubation (all are kept constant) fake : rubbery egg, allowed to re-harden and then put into water Materials and Methods : Eggs rotund beakers vinegar Water Sugar syrup (100% syrup : 1Kg sugar per liter water) Scale, delineate, ruler, Refrigerator 1) vizor egg circumference (with string and ruler, eagle-eyed dimension) and bidt. Record results. 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) pulse and weigh the eggs again (24h later), incubating them subsequently in the several(predicate) solutions (100% sy rup, 50% syrup, and plain water), 3 eggs in ! to each one condition. 4) Measure sizes...If you want to get a full essay, effect it on our website: BestEssayCheap.com

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