The Electrochemical Determination of Avogadro's Number with the Vernier Data Acquisition System.docx

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Shamell Bloodsaw4/28/19Formal Laboratory ReportThe Electrochemical Determination of Avogadro’s Number with the Vernier DataAcquisition SystemBackground InformationWhen Amedeo Avogadro was in high school in Vercelli, Italy he made a hypothesis thatin a system where gases have the same temperatures, pressure and volume, they will also havethe same number of molecules. In order to test this hypothesis, you would need to useelectrochemistry to determine “Avogadro’s Number”. In order to conduct this experimentcorrectly you will need to channel a minuscule amount of electricity through sulfuric acid, wherethe copper electrodes will be placed in. With the information of the mass of the copper beforeand after the experiment, amount of current used, the duration of the reaction, the number ofelectrons released when the copper is oxidized and the charge on a single electron, then useseveral equations that can determine Avogadro’s number.Specifically using the process of electrolysis where both the copper electrode isconnected to the anode which are both connected to a power source (battery in this case). Theions from the copper will be developed for every two electrons of the copper cation generated.An illustration for the oxidation reaction is shown as…¿2+¿(aq)+2e¿Cu(s)→Cu¿(Oxidation of copper at the anode)On the other hand, the electrons developing from the anode travel through the solution ofsulfuric acid to the cathode where a presence of+¿H¿causes them both to react which formshydrogen in the form of gas which is indicated by the bubbles present in the solution. Anillustration for the reduction reaction is shown as…¿→H2(g)+¿(aq)+2e¿2H¿(Reduction of hydrogen at the cathode)
During this electrolysis process the copper ions that are produced will create a light blue hue inthe solution. Also, there may be a presence of some copper deposits that develop at the cathode.

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Term
Summer
Professor
henshaw
Tags
Electrochemistry, Electron, Cathode, Amedeo Avogadro

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