Jump to content

Besoin d’une formule nombre d’oxydation


Go to solution Solved by yrr,

Recommended Posts

Posted

Salut, j’aurais besoin de la formule pour calculer le nombre d’oxydation d’un atome. Merci

  • Solution
Posted

Salut,

 

Je vais t'expliquer comment on fait:

 

Etape 1: Regarder la "charge" globale de la molécule.

   Par exemple:

n.o(CO2)=0

n.o(MnO4-)= -1

 

Etape 2: Retenir ces valeurs:

nogh.png

 

Etape 3: En déduire le nombre d'oxydation de l'atome mentionné dans l'item:

   Par exemple:

- pour le CO2

n.o(C) + 2n.o(O)=0

n.o(C) + 2* (-2)= 0

n.o(C) - 4= 0

n.o(C)=4

 

-pour le n.o(MnO4-):

n.o(Mn) + 4n.o(O)= -1

n.o(Mn)+ 4* (-2) = -1

n.o(Mn) - 8 = -1

n.o(Mn)= -1+8

n.o(Mn)= 7

 

Bon Courage!!!

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...