script.py

Created by bilouclic

Created on November 12, 2023

854 Bytes


Comment calculer n ? :

n = c x v 
n = m / M
n = V(gaz) / Vm

Réaction d'oxydo-rédu : 
  Oxydation
<-------------
Ox + ne- = red
-------------->
  Réduction
  
Exemple exo :
  
Ag(+) / Ag
Pb(2+) / Pb

demi équation :

Ag (+) + 1é = Ag
Pb = Pb(2+) + 2é

l'équation :
  
   Ag (+) + 1é | = Ag
+  Pb =| Pb(2+) + 2é
-------------------
2Ag (+) + 2é + Pb -->
2Ag + Pb(2+) + 2é 

réactif :
oxydé : c'est 
Ag(+) : car on voit
qu'il augmente
réduit :  c'est
Pb car on voit qu'il
diminue

Pour équilibrer un demi
équation :

MnO4(-) / Mn(2+)
[ 4H2 ]    [ 4H2O ]
  8H(+)     8H(+)
            O4

MnO4(-) + 8H(+) + 5é =
Mn(2+)+ 4H2O + 

équilibrer une équa :

C3H8O + 3O2 -> 3Co2 +4H2O

-Cx3           -Cx1
-Hx8           *Ox3
*Ox3           -Hx2
--------------------
*Cx3            *Cx3
*Hx8           *Hx8
*Ox6           *Ox6


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