01863nam a22002897a 450000500170000000800410001702200140005803700190007208200100009110000410010124501210014226000770026330000150034049000510035550500630040652007100046965000300117965000400120965000360124965000370128565000390132265000470136185600490140894200080145795200910146599900170155620231106100600.0231030b           ||||| |||| 00| 0 eng d  a0021-9584  bRIEBPL Library  a540.7  aJuliana Mesquita Contarini et al ...  a An Experiment of Chemistry with Historical Context: 18th-Century Potash Production in Brazilb(Journal Article) c   aWashington, United Statesb:American Chemical Societyc,January 10, 2023  a 350-354p.  aAmerican Chemical Society, Volume 100, Issue 1  a***______{For Hard Copy, Please visit Library.}________***  aAbstract:-

Potash, an essential raw material of the 18th century, used to be produced from the ashes of plants. Known since antiquity, it was in 1807 that Humphry Davy put an end to the decades-long controversy about its nature as a compound. The technology behind potash production was implemented in Brazil by the Portuguese naturalist Frei Velloso. The steps in potash production and the related difficulties and controversies about its composition make this case study a convenient tool for teaching the history of chemistry. The results concluded that the potash production from ashes provided proper context for teaching practical extraction yield, carbonate identification, and pH determination.

  aHigh School/Introductory   aChemistry First-Year Undergraduate/  aGeneral Laboratory Instruction   aHands-On Learning/Manipulatives   aGravimetric Analysis Precipitation  a/Solubility Acids/Bases ReactionsShow Less  u https://doi.org/10.1021/acs.jchemed.2c00896  cPER  00104070aRIEBPLbRIEBPLd2023-11-06l0o540.7r2023-11-06 00:00:00w2023-11-06yPER  c44692d44691