Bufer sistemalar ko’riladigan masalalar


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BUFER SISTEMALAR,

BUFER SISTEMALAR

KO’RILADIGAN MASALALAR

Bufer sistemalarning turlari

Bufer sistemalar ikki turga bo’linadi:

1. Kuchsiz kislota va shu kislotaning kuchli

asos bilan hosil qilgan tuzining aralashmasi.

Masalan: CH3COOH + CH3COONa - atsetatli

bufer eritma

2. Kuchsiz asos va shu asosning kuchli kislota

bilan hosil qilgan tuzining aralashmasi.

Masalan: NH4OH + NH4Cl - ammiakli bufer

eritma

Ko’riladigan bufer sistemalar

  • CH3COOH + CH3COONa - atsetatli bufer sistema
  • NH4OH + NH4Cl - ammiakli bufer sistema
  • H2CO3 + NaHCO3 - gidrokarbonatli bufer sistema
  • NaH2PO4 + Na2HPO4 - fosfatli bufer sistema
  • PtCOOH + PtCOONa - oqsilli bufer sistema
  • HHb + KHb - gemoglobinli bufer sistema
  • HHbO2 + KHbO2 - oksigemoglobinli bufer sistema

Kislotali bufer sistema uchun Genderson-Gasselbah tenglamasi

  • CH3COOH CH3COO- + H+
  • CH3COONa CH3COO- + Na+
  • [H+][CH3COO-]
  • Kislota uchun: Kdis.=------------------- yoki:
  • [CH3COOH]
  • [CH3COOH]
  • [H+] = Kdis.-----------------
  • [CH3COO-]

Asosli bufer sistema uchun Genderson-Gasselbah tenglamasi


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