Membrane Permeability (pH sensor)

Students use a pH sensor to explore which substances can and cannot pass through a cell membrane model.

Supports NGSS Disciplinary Core Idea LS1.AThe cell membrane is represented by a semi-permeable dialysis tubing sac filled with a substance. Students will look for evidence to determine whether starch, iodine, or hydrogen ions are able to pass through the membrane. Students can detect non-visible H+ ion movement by observing changes in pH with a pH sensor, in addition to visible changes when starch and iodine come into contact with one another.

Grade Level: High School

Subject: Biology

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Membrane Permeability

Understand semi-permeable membranes through this exploration of dialysis tubing's permeability for H+ ions, OH- ions, Starch, and Iodine. Supports PASCO's...

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Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.
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Source Collection: Lab #02