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Chemistry

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May 10, 2024

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Copyright 2024 - Science Interactive | https://scienceinteractive.com Exercise 1 Osmosis is when water molecules move from an area of lesser solute to an area of greater solute. Osmosis is observed in this exercise by the water molecules moving between the potato and the glucose solution. 1. Define osmosis. How did you observe osmosis in this exercise? The molarities that the water entered the potato strip was .2M, .4M, .6M, .8M, and 1M. The water moved into the strips because the concentration of solutes outside of the potato was less than inside the potato. These solutions were hypertonic. 2. List molar concentrations (0.0 M, 0.2 M, etc.) at which water entered the potato strips. Why did water move into the potato strips? Were these solutions hypotonic, hypertonic, or isotonic? The molarities that the water entered the potato strip was .2M, .4M, .6M, .8M, and 1M. The water moved out the strips because the concentration of solutes outside of the potato was greater than inside the potato. These solutions were hypotonic. 3. List the molarities at which water exited the potato strips. Why did water move out of the potato strips? Were these solutions hypotonic, hypertonic, or isotonic?
Copyright 2024 - Science Interactive | https://scienceinteractive.com Data Table 2: Potato Masses Yes, my hypothesis was supported by my experimental results. My hypothesis stated that with time the potato strips mass would be greater and this is from the absorption of the glucose solution. 4. Was the hypothesis you recorded in Data Table 2 supported or refuted by your experimental results? Discuss your results in relation to your hypothesis. (It is acceptable if your hypothesis was refuted, as long as you can explain WHY.) I would place the potato strips in the .2M because it has the least amount of the solution making it less likely to absorb into the the potato. This solution would be isotonic. 5. If you were asked to place potato strips in a solution that would cause the potato to neither gain or lose mass, what molarity would you choose and why? Would this solution be hypotonic, hypertonic, or isotonic?
Copyright 2024 - Science Interactive | https://scienceinteractive.com Test Tube Solution a Distilled water b 0.2 M sucrose c 0.4 M sucrose d 0.6 M sucrose e 0.8 M sucrose f 1.0 M sucrose Hypothesis: Test Tube Initial Mass (g) a b c d e f Hypothesis: Test Tube Final Mass (g) a b c d e f Hypothesis: If the solution contains more glucose, the potatoes will each gain weight with time, soaking in the solutions. 1.4 1.6 1.5 1.1 1.1 1.3 1.8 1.9 1.6 1.3 1.3 1.6
Copyright 2024 - Science Interactive | https://scienceinteractive.com Test Tube Mass Difference (g) a b c d e f Hypothesis: Test Tube Percent Change in Mass (%) a b c d e f Hypothesis: Test Tube Class Average: Percent Change in Mass (%) (If Available) a b c d e f Hypothesis: .4 .3 .1 .2 .2 .3 28.5 18.8 6.7 18.2 18.2 23.1
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