Advanced PlacementCollegeHigh School / Biology


Students use a pH sensor to investigate the diffusion of hydrogen ions through a semipermeable membrane, comparing the rates of diffusion for two solutions that differ in their acidity.


Student Files

2_ABI_Diffusion.cap 7.82 KB
2_ABI_Diffusion_S.docx 233.63 KB
2_ABI_Diffusion_S.pdf 353.10 KB
2_ABI_Diffusion.spklab 7.20 KB

Teacher Files

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Standards Correlations

IB Topics AP Topics
1.4; 10.3 2-1.C; 2-2.C; 2-2.F; 2-2.I

Featured Equipment

pH Sensor

Wireless pH Sensor

Here’s the best tool for measuring pH since litmus paper. The Wireless pH Sensor connects via Bluetooth® to monitor the pH of solutions.

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.

Copyright Disclaimer: Section 107 of the Copyright Act of 1976 makes allowance for “fair use” for purposes of teaching, scholarship, education and research. Reproduction under any other circumstances, without the written consent of PASCO, is prohibited.
Source: Lab #02

Advanced Biology Through Inquiry