Determinación de la constante de Avogadro mediante una experiencia de electrólisis realizada con productos de bajo coste
- Antonio Tomás-Serrano
- Rafael Garcia-Molina
ISSN: 1575-3417, 2792-5250
Any de publicació: 2017
Número: 1
Pàgines: 47-53
Tipus: Article
Altres publicacions en: Anales de Química de la RSEQ
Resum
A simple and inexpensive procedure, based on the electrolysis of copper sulfate, is presented to determine the value of Avogadro’s constant NA. From the weight of the metallic mass deposited in this process (weighted independently of the anode), measured as a function of the duration of the electrolysis, numerical results for NA are obtained in very good agreement with the internationally accepted value. This is a remarkable fact, given the characteristics of the experimental set up employed, which is based in the use of household and low cost materials. Given the quality of the result, as well as the simplicity and economy of devices, this activity represents an excellent complement to the discussion of the concept of mole and the associated numerical quantity.