AVALIA??O DA APLICA??O DO REAGENTE Me-BDB COMO INDICADOR áCIDO/BASE NAS AULAS PRáTICAS DE QUíMICA ANALíTICA

摘要

In the present work the Me-BDBD reagent was applied as indicator in acid-base titration by agroup of students. The results had been compared with titration carried out using phenolphthalein asindicator and also potentiometric titration. Statistical tests for a confidence level of 90% had beenapplied. Test t indicated that there were not statistically significant differences among the results, withgood agreement for the different titration methods used. However, by test F the results of thepotentiometric titration had been considered more precise of than the volumetric, when Me-BDBD isused as indicator.