ESNH4+ Which of the following is the most value o buffer system for at a) H₂CO3/HCO₃-...

Question

Question

ESNH4+ Which of the following is the most value o buffer system for at a) H₂CO3/HCO₃- (Kar for H₂CO₃ is 4.3 €) b) HCO3- I CO

Answer 1

Answer #1

Answer is E).

Because buffer work effectively When pH = pKa.

Since for e) Ka is 6.9×10^-3 hence it's pKa = -log(6.9×10^-3) = 2.16 is very close to 3. Thus it effective at pH 3.

Answer 2

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