Biology Eei
| 2012 | | Toby Rheinberger
Lab Partner: Jeremy Saba |
[The Effect of surface area to volume ratio and solute concentration on osmosis.] | The aim of this experiment was to test the effect of surface area on osmosis and the effect of solute concentration on osmosis. To test this aim to hypotheses were devised. 1) If potato pieces are immersed in various salt solutions, then the pieces with the greatest surface area to volume ratio will experience the greatest weight change, because more water can move by osmosis across the potato cell’s semi permeable membrane. 2) If potato pieces are immersed in various salt solutions, then the pieces immersed in the most concentrated solution will experience he greatest weight change, because more water must pass across the potato cells semi permeable membrane by osmosis to achieve an equilibrium. The results from testing these hypotheses did not support either and were shown to be flawed because they did not reflect the theories of osmosis relating to surface area to volume ration and salt concentration. |
Contents Introduction 2 Figure 1 2 Figure 3 3 Figure 4 4 Figure 5 4 Figure 6 4 Aim 5 Hypotheses 5 Variables 6 Independent 6 Dependent 6 Controlled 6 Materials 6 Method 7 Risk Assessment 7 Risk Conclusion: 7 Results/ Data collection 8 Surface Area to Volume Ratio 8 Table 1 8 Table 2 8 Table 3 8 Solute Concentration 8 Table 4 8 Table 5 8 Table 6 9 Discussion 9 Conclusion: 10 Bibliography 11 Appendix 12
Introduction All living organisms require an even distribution of specific nutrients throughout their bodies. The distribution of these nutrients must remain constant otherwise the organism will not be able to function at full capacity, which may lead to its death. It is for this reason that osmosis and other forms of diffusion are of prime importance to all living organisms, because they influence the distribution of nutrients throughout the
Lab Partner: Jeremy Saba |
[The Effect of surface area to volume ratio and solute concentration on osmosis.] | The aim of this experiment was to test the effect of surface area on osmosis and the effect of solute concentration on osmosis. To test this aim to hypotheses were devised. 1) If potato pieces are immersed in various salt solutions, then the pieces with the greatest surface area to volume ratio will experience the greatest weight change, because more water can move by osmosis across the potato cell’s semi permeable membrane. 2) If potato pieces are immersed in various salt solutions, then the pieces immersed in the most concentrated solution will experience he greatest weight change, because more water must pass across the potato cells semi permeable membrane by osmosis to achieve an equilibrium. The results from testing these hypotheses did not support either and were shown to be flawed because they did not reflect the theories of osmosis relating to surface area to volume ration and salt concentration. |
Contents Introduction 2 Figure 1 2 Figure 3 3 Figure 4 4 Figure 5 4 Figure 6 4 Aim 5 Hypotheses 5 Variables 6 Independent 6 Dependent 6 Controlled 6 Materials 6 Method 7 Risk Assessment 7 Risk Conclusion: 7 Results/ Data collection 8 Surface Area to Volume Ratio 8 Table 1 8 Table 2 8 Table 3 8 Solute Concentration 8 Table 4 8 Table 5 8 Table 6 9 Discussion 9 Conclusion: 10 Bibliography 11 Appendix 12
Introduction All living organisms require an even distribution of specific nutrients throughout their bodies. The distribution of these nutrients must remain constant otherwise the organism will not be able to function at full capacity, which may lead to its death. It is for this reason that osmosis and other forms of diffusion are of prime importance to all living organisms, because they influence the distribution of nutrients throughout the
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