manonnn Posted May 13, 2020 Share Posted May 13, 2020 Bonjour, j'étais en train de faire les QCM de pH dans le poly du TAT mais pour l'item A du QCM 13, on nous de mande de calculer le coefficient de dissociation et il nous faux p (car i = 1 + alpha (p - 1) ). La correction dit que p = 2 mais je ne voit pas du tout d'ou vient ce 2... https://www.casimages.com/i/200513103234573514.png.html merci ! Quote Link to comment Share on other sites More sharing options...
Ancien Responsable Matière Solution alexandre3222 Posted May 13, 2020 Ancien Responsable Matière Solution Share Posted May 13, 2020 Salut ! Le H2CO3 va donner du H+ et du HCO3- d'où le p=2 Quote Link to comment Share on other sites More sharing options...
manonnn Posted May 13, 2020 Author Share Posted May 13, 2020 ah oui merci ! @alexandre3222 Quote Link to comment Share on other sites More sharing options...
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