Diffusion Workbook

docx

School

Coastal Carolina Community College *

*We aren’t endorsed by this school

Course

110

Subject

Chemistry

Date

Feb 20, 2024

Type

docx

Pages

Uploaded by MajorSummerKoala3

Diffusion TOTAL POINTS: 24 POINTS PRE-LAB QUESTIONS (3 POINTS) 1. A concentration gradient affects the direction that solutes diffuse. Describe how molecules move with respect to concentration. a. Diffusion of solutions typically move from areas of high to low concentration. 2. How does the size of a solute affect the rate of diffusion? a. Solute diffusion and size are inversely proportional, the bigger the solute is the slower it diffuses. 3. Does polarity affect the rate of diffusion? Explain your answer. a. Polarity has little effect on the rate of diffusion. Polar molecules do not fuse well with the lipid core of the phospholipid bilayer of the plasma membrane. Nonpolar molecules diffuse much easier. ©eScience Labs, 2018

Diffusion EXPERIMENT 1: DIFFUSION THROUGH A LIQUID (5 POINTS) Result Tables Table 1: Rate of Diffusion in Corn Syrup Time (sec) Blue Dye Red Dye 10 4 cm 4 cm 20 2.5 cm 2 cm 30 2 cm 1.7 cm 40 1.9 cm 1.5 cm 50 1.5 cm .5 cm 60 1.4 cm .4 cm 70 1.4 cm .3 cm 80 1.4 cm .3 cm 90 1.3 cm .2 cm 100 1.2 cm .2 cm 110 1.2 cm .1 cm 120 1 cm .1 cm ©eScience Labs, 2018

Diffusion Post-Lab Questions (4 points) 1. Write a hypothesis for this experiment. a. The red dye should diffuse faster than the blue dye because it is lighter in weight. 2. Which dye diffused the fastest? a. The red dye. 3. Does the rate of diffusion correspond with the molecular weight of the dye? a. Yes because as the solution diffused, it became less concentrated and diffused slower. Both were rapid in the beginning because of the high concentration. 4. Does the rate of diffusion change over time? Why or why not? a. The rate of diffusion does change over time; initially, it is rapid due to the high concentration, but as the solution becomes less concentrated, diffusion slows down. ©eScience Labs, 2018

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Diffusion EXPERIMENT 2: CONCENTRATION GRADIENTS AND MEMBRANE PERMEABILITY (5 POINTS) Result Tables Table 3: Indicator Reagent Data Indicator Starch Positive Control (Color) Starch Negative Control (Color) Glucose Positive Control (Color) Glucose Negative Control (Color) IKI Solution Dark brown Dark yellow n/a n/a Glucose Test Strip n/a n/a Yellow Yellow Table 4: Diffusion of Starch and Glucose Over Time Indicator Dialysis Bag After 1 Hour Beaker Water After 1 Hour IKI Solution Yellow with brown swirl Dark yellow Glucose Test Strip Yellow Yellow Post-Lab Questions (5 Points) 1. Why is it necessary to have positive and negative controls in this experiment? a. Because it ensures that the results are due to independent variables. 2. Draw a diagram of the experimental set-up. Use arrows to depict the movement of each substance in the dialysis bag and the beaker. a. 3. Which substance(s) crossed the dialysis membrane? Support your response with data- based evidence. ©eScience Labs, 2018

Diffusion a. The glucose did pass through based off the leftover starch in the bag. 4. Which molecules remained inside of the dialysis bag? a. The starch molecules. 5. Did all of the molecules diffuse out of the bag into the beaker? Why or why not? a. No, there were remnants of starch left in the bag. PICTURE (2 POINTS): Insert a picture of yourself completing this lab to this word document prior to uploading for full credit. ©eScience Labs, 2018

Related Documents

IMG_0580.jpeg

Lab 4 - Hannah Mayse.docx

#10 SCH3U Lesson.docx

#8 SCH3U Lesson Tyler Neniska.docx

#2 SCH3U Lesson.docx

Chapter 13 Concept Check.pdf

Chemistry of Life Workbook.docx

General Lab Safety Workbook.docx

Chemical Bonding Workbook.docx

IMG_9172.jpeg

Physical Science Lab 5 (2).docx

Experiment 3_ Exploring the Behavior of Acids .docx

Recommended textbooks for you

World of Chemistry, 3rd edition

Chemistry

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Brooks / Cole / Cengage Learning

Chemistry for Today: General, Organic, and Bioche...

Chemistry

ISBN:9781305960060

Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen

Publisher:Cengage Learning

General, Organic, and Biological Chemistry

Chemistry

ISBN:9781285853918

Author:H. Stephen Stoker

Publisher:Cengage Learning

Chemistry: The Molecular Science

Chemistry

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:Cengage Learning

Living By Chemistry: First Edition Textbook

Chemistry

ISBN:9781559539418

Author:Angelica Stacy

Publisher:MAC HIGHER

Introductory Chemistry For Today

Chemistry

ISBN:9781285644561

Author:Seager

Publisher:Cengage

SEE MORE TEXTBOOKS

Recommended textbooks for you

World of Chemistry, 3rd edition
Chemistry
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Brooks / Cole / Cengage Learning
Chemistry for Today: General, Organic, and Bioche...
Chemistry
ISBN:9781305960060
Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:Cengage Learning
General, Organic, and Biological Chemistry
Chemistry
ISBN:9781285853918
Author:H. Stephen Stoker
Publisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Living By Chemistry: First Edition Textbook
Chemistry
ISBN:9781559539418
Author:Angelica Stacy
Publisher:MAC HIGHER
Introductory Chemistry For Today
Chemistry
ISBN:9781285644561
Author:Seager
Publisher:Cengage