Diffusion
PRE-LAB QUESTIONS
1. What characteristics would increase the likelihood a molecule would diffuse across a
membrane? Fermentation can be alcoholic or lactic acid fermentation, and
depending on the organism and conditions. These processes allow organisms to
produce energy when oxygen is limited or unavailable.
2. What is the difference between simple and facilitated diffusion? Simple diffusion is a
passive process that occurs without the need for any specialized proteins; in
simple diffusion, molecules move directly through the lipid bilayer of the cell
membrane.
3. What is the process of active transport? How does it differ from diffusion? Active
transport is a biological process that enables the movement of molecules or ions
across a cell membrane against their concentration gradient, from an area of
lower concentration to an area of higher concentration.
©eScience Labs, 2021
This study source was downloaded by 100000901307859 from CourseHero.com on 10-14-2025 05:18:43 GMT -05:00
https://www.coursehero.com/file/251843396/IB-1624-L04-Diffusiondocx/
, Diffusion
EXPERIMENT 1: DIFFUSION THROUGH A LIQUID
Data Tables
Purpose (What question is this experiment designed to answer?):
Hypothesis (Based on what you’ve learned in the pre-lab materials, write and If/Then statement
regarding the outcome of this experiment.):
Table 1: Rate of Diffusion in Corn Syrup
Time (sec) Blue Dye Red Dye
10 1.7
20 1.9
30 2
40 2.2
50 2.6
60 3.1
70 3.2
80 3.4
90 3.4
100 3.5
110 3.6 3.
120 3.6
©eScience Labs, 2021
This study source was downloaded by 100000901307859 from CourseHero.com on 10-14-2025 05:18:43 GMT -05:00
https://www.coursehero.com/file/251843396/IB-1624-L04-Diffusiondocx/
PRE-LAB QUESTIONS
1. What characteristics would increase the likelihood a molecule would diffuse across a
membrane? Fermentation can be alcoholic or lactic acid fermentation, and
depending on the organism and conditions. These processes allow organisms to
produce energy when oxygen is limited or unavailable.
2. What is the difference between simple and facilitated diffusion? Simple diffusion is a
passive process that occurs without the need for any specialized proteins; in
simple diffusion, molecules move directly through the lipid bilayer of the cell
membrane.
3. What is the process of active transport? How does it differ from diffusion? Active
transport is a biological process that enables the movement of molecules or ions
across a cell membrane against their concentration gradient, from an area of
lower concentration to an area of higher concentration.
©eScience Labs, 2021
This study source was downloaded by 100000901307859 from CourseHero.com on 10-14-2025 05:18:43 GMT -05:00
https://www.coursehero.com/file/251843396/IB-1624-L04-Diffusiondocx/
, Diffusion
EXPERIMENT 1: DIFFUSION THROUGH A LIQUID
Data Tables
Purpose (What question is this experiment designed to answer?):
Hypothesis (Based on what you’ve learned in the pre-lab materials, write and If/Then statement
regarding the outcome of this experiment.):
Table 1: Rate of Diffusion in Corn Syrup
Time (sec) Blue Dye Red Dye
10 1.7
20 1.9
30 2
40 2.2
50 2.6
60 3.1
70 3.2
80 3.4
90 3.4
100 3.5
110 3.6 3.
120 3.6
©eScience Labs, 2021
This study source was downloaded by 100000901307859 from CourseHero.com on 10-14-2025 05:18:43 GMT -05:00
https://www.coursehero.com/file/251843396/IB-1624-L04-Diffusiondocx/
