Bio Lab Final Questions with 100% Verified Answers
Latest Update
Question: EXPERIMENT 1: What was the color of the iodine solution in the diffusion bag
before and after dialysis?
Answer:
The iodine solution was reddish brown before dialysis and did not change color during
dialysis
Question: EXPERIMENT 1: What was the color of the starch solution in the beaker after
dialysis?
Answer:
The starch solution turned bluish black after dialysis.
Question: EXPERIMENT 1: Based on your results with iodine and starch, what material(s)
diffused across the membrane?
Answer:
Iodine
Question: EXPERIMENT 1: Why was iodine able to diffuse across the membrane whereas
starch was not?
Answer:
The pores of the bag are larger than the iodine molecules but smaller than the starch
molecules.
Question: EXPERIMENT 2: What was the change in mass for the diffusion bag when the bag
initially contained 20% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were, there is a range of possible answers. Pick the
answer that is closest to yours.
Answer:
3.441 g
Question: EXPERIMENT 2: What was the change in mass for the beaker in which the
diffusion bag initially contained 15% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were, there is a range of possible answers. Pick the
answer that is closest to yours.
Answer:
-1.744 g
, Question: EXPERIMENT 2: What was the change in mass for the beaker in which the
diffusion bag initially contained 10% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were there is a range of possible answers. Pick the answer
that is closest to yours.
Answer:
0.000 g
Question: EXPERIMENT 2: What was the change in mass for the diffusion bag when the bag
initially contained 5% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were there is a range of possible answers. Pick the answer
that is closest to yours.
Answer:
-1.826 g
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 20% fructooligosaccharides.
Answer:
The sugar concentration was lower in the beaker than in the bag, so water moved from the
beaker to the bag
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 15% fructooligosaccharides.
Answer:
The sugar concentration was lower in the beaker than in the bag, so water moved from the
beaker to the bag
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 10% fructooligosaccharides.
Answer:
The sugar concentration was the same in the beaker and the bag, so there was no net
movement of water
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 5% fructooligosaccharides.
Answer:
The sugar concentration was higher in the beaker than in the bag, so water moved from the
bag to the beaker.
Latest Update
Question: EXPERIMENT 1: What was the color of the iodine solution in the diffusion bag
before and after dialysis?
Answer:
The iodine solution was reddish brown before dialysis and did not change color during
dialysis
Question: EXPERIMENT 1: What was the color of the starch solution in the beaker after
dialysis?
Answer:
The starch solution turned bluish black after dialysis.
Question: EXPERIMENT 1: Based on your results with iodine and starch, what material(s)
diffused across the membrane?
Answer:
Iodine
Question: EXPERIMENT 1: Why was iodine able to diffuse across the membrane whereas
starch was not?
Answer:
The pores of the bag are larger than the iodine molecules but smaller than the starch
molecules.
Question: EXPERIMENT 2: What was the change in mass for the diffusion bag when the bag
initially contained 20% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were, there is a range of possible answers. Pick the
answer that is closest to yours.
Answer:
3.441 g
Question: EXPERIMENT 2: What was the change in mass for the beaker in which the
diffusion bag initially contained 15% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were, there is a range of possible answers. Pick the
answer that is closest to yours.
Answer:
-1.744 g
, Question: EXPERIMENT 2: What was the change in mass for the beaker in which the
diffusion bag initially contained 10% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were there is a range of possible answers. Pick the answer
that is closest to yours.
Answer:
0.000 g
Question: EXPERIMENT 2: What was the change in mass for the diffusion bag when the bag
initially contained 5% fructooligosaccharides solution? mfinal−minitial=Δm
Positive values will reflect a gain of mass. Negative values will reflect a loss of mass. Note
that depending on how exact you were there is a range of possible answers. Pick the answer
that is closest to yours.
Answer:
-1.826 g
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 20% fructooligosaccharides.
Answer:
The sugar concentration was lower in the beaker than in the bag, so water moved from the
beaker to the bag
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 15% fructooligosaccharides.
Answer:
The sugar concentration was lower in the beaker than in the bag, so water moved from the
beaker to the bag
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 10% fructooligosaccharides.
Answer:
The sugar concentration was the same in the beaker and the bag, so there was no net
movement of water
Question: EXPERIMENT 2: Explain the results of the experiment in which the diffusion bag
contained 5% fructooligosaccharides.
Answer:
The sugar concentration was higher in the beaker than in the bag, so water moved from the
bag to the beaker.
