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qcm15, TD3 oxydo reduction


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  • Ancien Responsable Matière
Posted

Re ^^

Quelqu'un pourrait m'expliquer comment on trouve la valeur de l'item A (qui est juste) s'il vous plait ?

1545558167-qcm15-1.png

1545558173-qcm15-2.png

merci beaucoup !! ? 

  • Ancien Responsable Matière
Posted
il y a 7 minutes, Chat_du_Cheshire a dit :

cc twa ! ?

 

E'° = E° - 0,06xpH /n (avec x le nombre de H+) donc E° = E'° + 0,06xpH /n = -0,19 + 0,06*2*7 /2 = 0,23V

 

voilou

ahh oui d'accoord ! (la dernière formule quoi)  merci beaucoup!!  ?

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