Advanced Placement / 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.

Source: Advanced Biology Through Inquiry


Student Files

ADVBIO_02_Diffusion_S.docx 226.57 KB
ADVBIO_02_Diffusion_S.pdf 351.82 KB
ADVBIO_02_Diffusion.spklab 6.17 KB

Teacher Files

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Standards Correlations

IB Topics AP Topics
1.4; 10.3 2

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.

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