Chapter16: Testing Testing
Section: Chapter Questions
Problem 12MC
Related questions
Question
9. What relationship exists between molecular weight and the rate of diffusion?
Transcribed Image Text:Tanasha MCGOwan
Student
LABORATORY REPORT
Lab Section
Exercise 6: Diffusion and Osmosis
Diffusion and Molecular Weight
8. Record the diameter of the colored circle on the agar plate after 1 hour.
Methylene blue
(molecular weight 374)
mm
Potassium permanganate
(molecular weight 158)
mm
9. What relationship exists between molecular weight and the rate of diffusion?
Diffusion and Molecular Size
10.
Observe all color changes in the practice test. Record your observations in the space below.
Starch Test
Tube 1 - Starch + 12 KI:
Tube 2 - Tap water + 12 KI
Glucose Test
Tube 1 - 1% glucose + Benedict's (heated):
Tube 2 - 0.1% glucose + Benedict's (heated):
Tube 3- Tap water + Benedict's (heated):
On the basis of the indicator test for starch, what must have happened to the iodine molecules tha
were originally only in the water in the large test tube?
11.
On the basis of the indicator test for glucose, what must have happened to the glucose molecule
that were originally in the cellulose tubing sac?
12.
13.
Did starch molecules diffuse out of the sac?
How do you know?
om (S) bns eey
nuom (h leo
List the following in order of decreasing size: perforations in the sac, starch molecules, glucc
molecules.
14.
(largest)
(smallest)
Diffusion and Temperature
15.
Record your measurements of the colored areas in the space below.
At room temperature:
At freezing:
16. What evidence do you have that diffusion occurs more rapidly under warmer conditions?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Recommended textbooks for you