Triple-beam balance19 June 2003

I like taking photos in lab these days. This is our first experiment, where the students learn about using balances and volumetric equipment for making measurements. What some of them don't realize is that they're really learning about how to record their data to show not only the quantity of the measurement, but also the precision of the instrument they used for the measurement, by recording it with the proper number of signficant digits. Precision and accuracy are concepts quite dear to chemists, and quite annoying and troublesome to new many chemistry students.

I can tell already that this will be a good class. The students participate and ask questions in class. I like that.



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