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Using FTIR-ATR Spectroscopy to Teach the Internal Standard Method
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Bellamy, Michael K. – Journal of Chemical Education, 2010
The internal standard method is widely applied in quantitative analyses. However, most analytical chemistry textbooks either omit this topic or only provide examples of a single-point internal standardization. An experiment designed to teach students how to prepare an internal standard calibration curve is described. The experiment is a modified…
Descriptors: Spectroscopy, Chemistry, Teaching Methods, Science Instruction
Constructing a Plastic Bottle Wind Turbine as a Practical Aid for Learning about Using Wind Energy to Generate Electricity
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Appleyard, S. J. – Physics Education, 2009
A simple horizontal axis wind turbine can be easily constructed using a 1.5 l PET plastic bottle, a compact disc and a small dynamo. The turbine operates effectively at low wind speeds and has a rotational speed of 500 rpm at a wind speed of about 14 km h[superscript -1]. The wind turbine can be used to demonstrate the relationship between open…
Descriptors: Plastics, Science Instruction, Scientific Concepts, Scientific Principles