c103demonstration.py

Created by alten01

Created on February 02, 2023

599 Bytes

DEMONTRER QUE pH=pKa+log([A-]eq/[AH]eq)
Ka=[A-]eq*[H3O+]eq/[AH]eq
<=> -logKa=-log(//)
<=> -logKa = log([A-]eq/[AH]eq)
-log[H3O+]eq
<=> pKa=-log(//)+pH
<=> pH=pKa+log([A-]eq/[AH]eq)

DEMONTRER QUE :
[H2CO3]=[HCO3-]*10**(pKa1-pH)
H2CO3 est une base forte, ainsi 
pH=pKe+logc
<=>pH=pKa1+log([HCO3-]/[H2CO3])
<=>pH-pKa1=log([HCO3-]/[H2CO3])
<=>10**(-pH+pKa1)=[HCO3-]/[H2CO3]
<=>[H2CO3]=[HCO3-]*10**(pKa1-pH)

ESPECE AMPHOTERE:possede des 
proprietes acides et basiques
H3O+/H2O/HO-

SOLUTION TAMPON: solution dont
le pH varie peu par dilution ou 
ajout modere dacide ou de base

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