the last bit of this prac done today, using data loggers, pH probes and pH amplifiers.. which looked like transformer cables for the probes.
using a straw i blew into a small beaker filled with 40mL of water for 2min (120sec) and the data logger recorded progress.
it started at around 7.62, and by the end.. right at the end, it hit 4.97.
so that was that
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