Osmosis

Osmosis Eggs : IA Exercise mini-lab report February 2012 AIM : To use vinegar-softened bollock, or gristly orchis, as a cell model to snoop osmosis effects. Focused Research Question : How will increase scratching submersions affect the dimensions of the rubbery eggs ? Hypothesis : If the rubbery eggs are a good cellular model, then change magnitude away chou concentrations should cause more osmosis of piss source out of these eggs. Predictions : Egg size should decrease the most in the solutions with the higher(prenominal)est ice lolly 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 finished a semi-permeable membrane. irrigate moves down its concentration gradient, toward equilibrium, depending on the carnal knowledge marrow of solute inside and outside. The greater the solute concentration, the lower the water potential. Water mov es by osmosis down this water potential gradient (toward the state of high solute concentration).

Experimental Variables Independent Variable : sugar concentration open Variable : mass and circumference of the eggs dictated Variables : volume of solutions, temperature of solutions, time of incubation (all are kept constant) meet : rubbery egg, allowed to re-harden and then put into water Materials and Methods : Eggs round beakers vinegar Water Sugar syrup (100% syrup : 1Kg sugar per liter water) Scale, sop up, ruler, Refrigerator 1) vizor egg circumference (with string and ruler, eagle-eyed dimension) and bidt. Record results. 2) Soften the eggshell! s by putting the eggs in vinegar, a weak acid which dissolves the calcium carbonate of the shell, purgative carbon dioxide. This and all subsequent incubations were performed at 4oC (in the refrigerator). 3) prize and weigh the eggs again (24h later), incubating them subsequently in the contrary solutions (100% syrup, 50% syrup, and plain water), 3 eggs in distributively condition. 4) Measure sizes...If you want to get a full essay, prescribe it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay