'Biology Osmosis Observation\r'

'Biology laboratory land: Osmosis observation Measuring the dependence of make grass accomplish in white potato pieces on intentness of scraping tooth root By Jonas Kulikauskas Siauliai Didzdvaris Gymnasium conjecture: The much sugar in stem, the more potato cumulation pass on decrease. Aim: To project how potato mass will modification at incompatible density solution. Research research: How the mass of potato will flip-flop at incompatible concentration solutions? Variables: Dependent: solution concentration.Independent: sugar concentration in potatoes. Controlled: time, potato form. Apparatus: 1. 5 plastic cups 2. Distilated water 3. murphy 4. Knife 5. Clock 6. Electronical scales (±0,05) 7. bulk of sugar 8. Measuring piston chamber 9. Tap water regularity: Peeling quite a little the potato and cutting it into 1cm3 cubes (25 cubes) Weighing potatoes on the scales Putting different summate of sugar into five plastic cups (1st no sugar second 6,8g 3rd 13, 7g 4th 20,5 fifth 27,4g) Adding 100ml of water to each of the cups premix the sugar with waterPutting in 5 potatoes into each cup delay 20 minutes force out the potatoes, drying them up and pose on the scales Writing down new mass. Amount of sugar in solutionSolution concentration % cupful numberMass of five cubes before(±0,05g)Mass of five cubes subsequently (±0,05g) 0g0%15,8g6g 6,8g6,37%25,1g5,2g 13,7g12,05%35,5g5,3g 20,5g17. 01%45,6g5,4g 27,4g21,51%55,5g5,3g Graph: While the concentration is from 0% to 6,37% the net mass gets large, later on from 12,05% to 21,51% the net mass gets smaller.When the concentration is from 0% to 6,37% the net mass change is positive, when from 17. 01% to 21,51% †negative. Conclusion: The potato bewildered more mass as it was submerged in bigger concentration solutions because the bigger concentration difference is, the osmosis will occurs more intensively. Evaluation: I deem that laboratory work went beautiful well, I managed to s ee the differences in potato mass change and make a demonstration of it. Next time I should write down first numbers and not go ones to give more sinless results.\r\n'