Although it sounds like some kind of euphemism from Brave New World, a "pneumatic trough" is actually a very handy piece of classic chemistry lab kit. Besides providing a convenient means to collect samples of pure gases for various experiments, a pneumatic trough with a graduated container allows the easy volumetric measurement of reaction yields for gas-producing reactions.
If that all sounds too complicated, don't sweat. What I'm going to show in this tutorial is simply how to buildSource: MAKE: Blog RSS Feed
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