000			02107nam a22002057a 4500
005			20231027121054.0
008			231027b ||||| |||| 00| 0 eng d
022			_a0021-9584
100			_aSosa, Griselda L.
245			_aJelly Potentiometry, Do It Yourself (Journal Article)
260			_aWashington DC _b :American Chemical Society _c,2023
300			_a2373-2378p.
440			_aJournal of Chemical Society _v, Volume 100: Number 6, June 2023
505			_a***______{For Hard Copy, Please visit Library.}________***
520			_aAbstract: Understanding potentiometry is a difficult task when students in initial courses of Analytical Chemistry are first introduced to instrumental techniques. The closest instrument to them is a pH meter, which is frequently used as a “black box”, without a real understanding of how it works. Here we present the assembly of jelly modules that the students can combine in different ways with the purpose of visualizing what reference and indicator electrodes are and their function when they are used in potentiometric measurements with quantitative purposes. This didactic sequence was used during six semesters in a first course of Analytical Chemistry dictated for students becoming laboratory technicians in Chemistry and Chemical Engineering. It is a hands-on experiment to exemplify both a direct potentiometric analysis and a potentiometric titration (indirect analysis). It is simple, low-cost, and easy to apply. It only requires gelatin, salts, pieces of metal, and a multimeter. The students showed interest in its execution, and they were able to identify the functions of the electrodes, discuss the different analytical implications of potentiometric techniques among themselves, and make the requested graphics with very good results.
650			_a Electrochemistry| Electrolytic/Galvanic Cells| Potentials | Potentiometry | Oxidation/Reduction Titration| Volumetric Analysis
700			_aDeluchi, Guido E. | Ramírez, Silvana A | Hamer, Mariana
856			_uhttps://pubs.acs.org/doi/10.1021/acs.jchemed.2c01198
942			_cPER
999			_c44622 _d44621