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Neff's picture

Respiration Lab

We did this lab on a Friday and left it for the weekend.

We got foaming and some gas produced after 20 minutes. By the end of the day the 10% and 5% solutions had produced enough gas to measure but the students never saw it.

By Monday morning the gas was all gone due to the fact that the building is not heated on the weekends.

I suggest doing the lab on a weekday and looking at results after 24 hours.

We also added BTB solution to each one for a color change which showed the production of carbon dioxide gas.


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