We could then fill the plastic jar about three

This preview shows page 6 - 8 out of 14 pages.

We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Chemistry for Today: General, Organic, and Biochemistry
The document you are viewing contains questions related to this textbook.
Chapter 7 / Exercise 7.94
Chemistry for Today: General, Organic, and Biochemistry
Seager/Slabaugh
Expert Verified
6. Write a hypothesis.Think about our definitions of osmosis and diffusion. What do you think will happen to the weight of the bagduring the 20 minutes it sits in the jar of distilled water?7. Before we go ahead and look at the results, complete the following Comprehension Check.Comprehension Check1 When someone uses a 10% glucose solution, what is actually in this solution? Fill in the blanks with the correct percentages (this must add up to 100%).
2. For this question assume a dialysis tubing bag that contains dissolved salt, sugar, and starch, is put into a beaker and surrounded by distilled water.(Circle one answer.)
ACTIVITY 4 -- COMPLETING THE DIFFUSION AND OSMOSIS EXPERIMENT 1. Now let’s assume your dialysis tubing bag has been sitting in the cup of distilled water for at least 20 minutes. You remove your dialysis tubing bag from the jar of water. To test for osmosis,you would weigh the bag as you did in Activity 3, step 4 earlier.2. The final weight was 93.6 g.Did the bag gain or lose weight?Was your hypothesis about the weight changecorrect?3. Calculate the percent change in weightand record your answer.
What do you think moved through the membraneto cause this result?
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Chemistry for Today: General, Organic, and Biochemistry
The document you are viewing contains questions related to this textbook.
Chapter 7 / Exercise 7.94
Chemistry for Today: General, Organic, and Biochemistry
Seager/Slabaugh
Expert Verified
4. Now we need to figure what might have diffused though the membrane of the dialysis tubing. If salt, sugar or starch diffused through the membrane, we should be able to find them in the solution surrounding the bag. To test for diffusion,you would need three more test tubes that you labelled salt, sugar, and starch.We could test the waterfor salt, starch, and sugar using the same indicator chemicals.We will perform threedifferent chemical tests to determine the results of your experiment. Each uses an indicator chemical that changes colorif starch, salt, or sugar is present.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture