'IB Biology Potato Lab\r'

'Biology stump spud science science lab Table 1: Trial exit| Concentration of saccharose Solution (M) ±0. 2 ml| Initial quid of Potato eye Slice(g) ±0. 1 | Final corporation of Potato Core Slices (g) ±0. 1| 1| 0. 0| 7. 7| 9. 3| 2| | 6. 0| 8. 1| 3| | 6. 2| 7. 4| 4| | 10. 2| 13. 2| 5| | 8. 7| 10. 3| 6| | 4. 9| 6. 0| 7| | 9. 2| 10. 4| 1| 0. 2| 5. 8| 6. 0| 2| | 11. 6| 12. 1| 3| | 2. 5| 3. 1| 1| 0. 4| 14. 4| 13. 9| 2| | 2. 6| 2. 8| 3| | 8| 6. 5| 1| 0. 6| 7. 3| 5. 3| 2| | 10. 7| 7. 3| 3| | 9. 6| 7. 4| 4| | 2. 9| 2. 8| 1| 0. 8| 5. 6| 3. 6| 2| | 16. 0| 13. 1| 3| | 11. 5| 5. 9| 1| 1. | 7. 9| 5. 4| 2| | 10. 0| 6. 7| 3| | 9. 6| 6. 2| 4| | 4. 7| 3. 2| Table 2: Calculations of average starts Concentration of Sucrose Solution (M) ±0. 2 ml| Average Initial Mass of Potato Core Slice(g) ±0. 1 | Average Final Mass of Potato Core Slices (g) ±0. 1| potpourri in Mass (g) ±0. 1| parcel Change in Mass (%)| shopworn Deviation of Initial Mass| ideal Deviation of Final Mass | 0. 0| 7. 6| 9. 2| 1. 6| 22. 3| 1. 9| 2. 4| 0. 2| 6. 6| 7. 1| 0. 5| 6. 5| 4. 6| 4. 6| 0. 4| 8. 3| 7. 7| -0. 6| -7. 2| 5. 9| 5. 7| 0. 6| 7. 6| 5. 7| -1. 9| -25. 2| 3. 5| 2. 2| 0. | 11. 0| 7. 5| -3. 5| -31. 7| 5. 2| 5. 0| 1. 0| 8. 1| 5. 4| -2. 7| -33. 2| 2. 4| 1. 5|Sample Calculations: To ascertain average of sign fortune of stump spud core with 0. 2M root: # 1 + # 2 + # 3 / 3 5. 8 + 11. 6 +2. 5 / 3 = 6. 6 To re realise average of last people of potato core with 1. 0M response: # 1 + # 2 + # 3 + # 4 / 4 5. 4 + 6. 7 + 6. 2 + 3. 2 / 4 = 5. 4 To find pitch in plenitude in 0. 4M declaration: Final mass †initial mass = veer in mass 7. 7 †8. 3 = -0. 6 To find sh areage form in mass in 0. 6M solution: Final †initial / initial x 100 5. 7 †7. 6 / 7. x 100 = -25. 2 effigy 1: The effect of sucrose solution on the mass of potato cores Figure 1: In the to a high place graph, it’s visible that with an increasing ducking of sucrose solution there is ov erly a strike in the percent modify in mass. The r? look upon of 0. 9416 represents that there is a good descent in the info amongst the constriction of sucrose solution and the percent change in mass. The relationship between the data croup also be be by the err oneous belief bars, representing the standard difference of opinion from the data clo confident(predicate)s and the measuring of uncertainty.With the small illusion bars we know that the data is received; although as the last a couple of(prenominal) points point of intersection this indicates that the data is similar. Conclusion: I piece that as the slow-wittedness of sucrose increase, the change in mass and percentage of the change in mass decreased. This data did pledge the dead reckoning, as we knew from the term osmosis. Osmosis is the process of distribution of piddle molecules from an area of higher(prenominal) concentration to lower concentration. The concentration gradient between the potat o and the sucrose solution slide by to the amount of molecules coming in and out of the potato.Therefore, the data supports the hypothesis as when the water concentration was lower in the potato than in the sucrose solution, the water molecules locomote through the semi-permeable membrane into the potato which caused it to gain weight. With a higher concentration of water in the potato, the pull up stakes would be the opposite. so the prediction that the lower the concentration of sucrose, the higher the final weight of the potato was reinforced. The hypothesis is supported by the evidence of the graph. With a concentration of 0. M sucrose solution the increase in the change of mass was 1. 6g and a percentage change of 22. 3%. In comparison, the 0. 8M sucrose solution had a change in mass of -3. 5g and a loss of 31. 7%. Although in Figure 1 the r? value gives the fantasy that the data is very reliable, some of the erroneousness bars do overlap. While notice the data there are no outliers present, although when inspecting the change in mass the organic evolution between the 0. 8M concentration of sucrose and the 1. 0M total slightly increase; when accu appraisely they would inhabit decreasing.This may perhaps be the result of certain potential hallucinations. Evaluation: My results, go mostly concrete, had particular places where a few errors could have occurred; as they diff from the hypothesis that with a higher concentration of glucose there should be a decrease in the change of mass. As our class only had a certain amount of judgment of conviction to jazz the lab, each group go offd the lab with three different sucrose solutions. At the end of collecting our data, our classes’ results were compiled together to compare.An error is the fact that each group’s statistics came from different potatoes. As different potatoes were used, the pores in the membrane of each potato are different, causing a different amount of water molecules to be able to crystalise through and into the solution. This could prove the overall data to be unreliable. To fix this deviation, with more than time a group can complete their own lab with the full data with a single potato. Another error is the factor of temperature. Temperature affects osmosis as with a higher temperature the molecules are moving faster, causing osmosis to increase.As we left hand our beaker s with the potato cores inside the class inhabit overnight, the classroom temperature may have increased or decreased which would affect the mea certainly of osmosis inside the beaker. Due to the fact that it’s September, we can assume that the classroom temperature would decrease overnight; including the consequences that perhaps a window or door would have been left open. As the temperature in the classroom decreased, the rate of osmosis did as well. To fix this normal divergence error, the temperature of the classroom could be recorded as we placed the beake rs around the classroom to be left.Overnight it would be make sure that no windows or doors are left open, and that the temperature waistcloth the same throughout the experiment. A dictatorial error has to do with the scales that were used. The scales were a requisite for this lab; it’s important that they’re working correctly. While planning for this lab not at one point were the scales that we were using checked to make sure that they were fully functioning. This could establish the scale large off false numbers which changes our intact experiment. At the beginning before proceeding with the lab it must be made sure that the equipment is regularly checked and operative.To do so, we can take an object that we can identify the weight of, and test it on the scale to make sure it’s correct. As an extension to this investigation, it could be sinless again but testing osmosis with more of a variety of the amount of sucrose solution- it could exceed a concentrat ion of 1M to get over to 2M. This experiment could also be finished using different time frames; sooner of letting the potatoes rest for one solar day they could be let stand for one hour, or two hours to test how osmosis industrial plant within this shorter time frame.To fix our errors verbalise above, we must first make sure that all of our equipment is running properly and that the temperature of the room does not vary overnight. Bibliography: Diffusion and osmosis. (n. d. ). Retrieved from http://hyperphysics. phy-astr. gsu. edu/hbase/energizing/diffus. html McGraw-Hill. (2006). How osmosis works. Retrieved from http://highered. mcgraw-hill. com/sites/0072495855/student_view0/chapter2/animation__how_osmosis_works. html\r\n'