Which of the following is the most effective buffer system for a pH value of 4.45? A)H₂CO₃/HCO₃^- (Ka₁ for H₂CO₃ is 4.3 × 10^-7) B)HCO₃^-/CO₃^2- (Ka₂ for H₂CO₃ is 4.8 × 10^-11) C)H₂S/HS^- (Ka₁ for H₂S is 8.9 × 10^-8) D)HC₂O₄^-/C₂O₄^2- (Ka₂ for H₂C₂O₄ is 5.1 × 10^-5) E)H₃PO₄/H₂PO₄^- (Ka₁ for H₃PO₄ is 6.9 × 10^-3)

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The Answer of Which of the following is the most effective buffer system for a pH value of 4.45? A)H₂CO₃/HCO₃^- (Ka₁ for H₂CO₃ is 4.3 × 10^-7) B)HCO₃^-/CO₃^2- (Ka₂ for H₂CO₃ is 4.8 × 10^-11) C)H₂S/HS^- (Ka₁ for H₂S is 8.9 × 10^-8) D)HC₂O₄^-/C₂O₄^2- (Ka₂ for H₂C₂O₄ is 5.1 × 10^-5) E)H₃PO₄/H₂PO₄^- (Ka₁ for H₃PO₄ is 6.9 × 10^-3)

Which of the Following Is the Most Effective Buffer System