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QCM


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  • Responsable Matière
Posted

Salut

En refaisant le QCM1 je me suis retrouvé face a un probleme en effet dans la correction il est noté que l'item C est vrai or celon moi on a 3 mollecule KNO3- donne 3K+ + No3- 

Donc = 3*1*1 =3 

Idem pour le Don a dans la correction 

Ceq(NO3-) = (1 x 1 x 1) + (1 x 1 x 1) = 2 Eq.L-1

or j'aurais dit : la charge etant de 3

Ceq(NO3-) = (1 x 3 x 1) + (1 x 3 x 1) = 2 Eq.L-1

https://tutoweb.org/PDFs/Librairie/PASS/Concours Blanc/S1/Sujets/S1 - Concours Blanc - PASS - Sujets 2021-2022.pdf

Je sais que j'ai deja fait ce QCM mais la je n'y arrive plus et je comprends pas pourquoi 

  • Responsable Matière
Posted

merciiii beaucoupppp !!!!!!!!!!

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