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UE-1 QCM 8 examen session 2 chimie


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Posted

bonsoir, je voudrai que quelqu'un m'explique pourquoi la l'item E du QCM 8 est compte juste, parce que pour moi si on augmente le pH on augmente la concentration de H30+ donc le sens de la reaction vas etre dans le sens indirect donc formation de cyt-Fe3+

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  • Solution
Posted

Salut @toti,

il y a une heure, toti a dit :

i on augmente le pH on augmente la concentration de H30+

c'est l'inverse : quand le pH augmente, les H3O+ diminuent.

Pour le retenir, tu peux penser aux H3O+ comme de l'acidité ou penser à la formule :    pH = - log[H3O+] d'où [H3O+] = 10-pH

 

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