Jasmine, an old friend from high school, is also taking a biology course online through a different institution. She calls you out of the blue one day, begging you to come over and help her with her own osmosis lab assignment. When you arrive at her home, she leads you to the kitchen where she has six plastic cups, each filled with a different colored solution, sitting on her counter. Next to the cups is a paper towel on which rest six different blocks tinged the same colors as the solutions. Jasmine tearfully explains that her assignment was to soak apple blocks in six different sucrose solutions overnight, calculate each block’s change in mass, and identify the tonicity of each solution – but she forgot to record the concentrations of her solutions. While Jasmine goes off to find a tissue, you take a look at her lab notebook. Solution Initial Mass (g) Final Mass (g) Change in Mass (g) % Sucrose Red 1.88 1.79 -0.09 4.7% Orange 1.92 0.95 -0.97 50.5% Yellow 1.95 2.40 +0.45 23.1% Green 2.00 1.35 -0.65 32.5% Blue 1.89 2.90 +1.01 53.4% Purple 1.90 2.05 +0.15 7.9% 1a. Jasmine is so grateful for your help! She blushes as she asks if you would help her with one last problem. As a bonus question, her professor is asking that students graph the changes in mass (y-axis) vs % sucrose (x-axis) of the apple the blocks. Plot the data in excel. Add a linear trendline to your graph and include the equation of the line on the graph. 1b. Calculate the percent sucrose of Jasmine’s original apple (SHOW YOUR WORK)! Explain your rationale on how to solve this problem.
Jasmine, an old friend from high school, is also taking a biology course online through a different institution. She calls you out of the blue one day, begging you to come over and help her with her own osmosis lab assignment. When you arrive at her home, she leads you to the kitchen where she has six plastic cups, each filled with a different colored solution, sitting on her counter. Next to the cups is a paper towel on which rest six different blocks tinged the same colors as the solutions. Jasmine tearfully explains that her assignment was to soak apple blocks in six different sucrose solutions overnight, calculate each block’s change in mass, and identify the tonicity of each solution – but she forgot to record the concentrations of her solutions. While Jasmine goes off to find a tissue, you take a look at her lab notebook.
|
Solution |
Initial Mass (g) |
Final Mass (g) |
Change in Mass (g) |
% Sucrose |
|
Red |
1.88 |
1.79 |
-0.09 |
4.7% |
|
Orange |
1.92 |
0.95 |
-0.97 |
50.5% |
|
Yellow |
1.95 |
2.40 |
+0.45 |
23.1% |
|
Green |
2.00 |
1.35 |
-0.65 |
32.5% |
|
Blue |
1.89 |
2.90 |
+1.01 |
53.4% |
|
Purple |
1.90 |
2.05 |
+0.15 |
7.9% |
1a. Jasmine is so grateful for your help! She blushes as she asks if you would help her with one last problem. As a bonus question, her professor is asking that students graph the changes in mass (y-axis) vs % sucrose (x-axis) of the apple the blocks. Plot the data in excel. Add a linear trendline to your graph and include the equation of the line on the graph.
1b. Calculate the percent sucrose of Jasmine’s original apple (SHOW YOUR WORK)! Explain your rationale on how to solve this problem.
Sucrose is common sugar with the molecular formula C12H22O11. It is a disaccharide, a molecule composed of two monosaccharides: glucose and fructose. Sucrose is produced naturally in plants, from which table sugar is refined.
Osmosis is the simple physical process in which net movement of a solvent through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to level the equalize of the solute concentrations on the two sides.
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