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The electrochemical synthesis of a free-standing film of polypyrrole, using commonly available equipment and materials, is described at a level suitable to application in a general chemistry laboratory. Also described are methods to quantitatively assess the doping level and to characterize the polymer film in terms of its conductivity as a function of temperature.

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The product has a melting point similar to benzophenone.A melting point in no way resembles a chemical compound, but it may resemble another compound's melting point. The sentence should read "…a melting point similar to that of benzophenone."Solubility was the principal criteria for choosing the nitrate salt.Criterion and phenomenon are two words of Greek origin often misused as their plurals. Spectrum, too, (of Latin origin) is often casually replaced with its plural spectra by those who most often utilize spectroscopy.Pentaborane and ammonia were reacted at low temperature.Few besides chemists are brazen enough to use react as a transitive verb. The chemicals react, chemists don't react them. This usage is quite common, however, but it makes one wonder about the user's understanding of thermodynamics! An historical approach to the teaching of chemistry presents a different perspective.