What is the pH of a buffer that is 0.12 M in lactic acid (HC3H503) and 0.10 m in sodium lactate? For lactic acid, K…
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Question “What is the pH of a buffer that is 0.12 M in lactic acid (HC3H503) and 0.10 m in sodium lactate? For lactic acid, K…”
What is the pH of a buffer that is 0.12 M in lactic acid (HC3H503) and 0.10 m in sodium lactate? For lactic acid, Ka= 1.4×10-4 a 3.77 6.3.85 OC 10.33 d. 1.20
Answer
The pH of an acidic buffer solution is given by pH =
pKa+ log(conjugate base/ weak acid)
The pH of an acidic buffer solution in this case is
given by pH = pKa+ log(sodium lactate/ lactic acid)
The pH of the given buffer solution = -log(1.4*10^-4) +
log(0.10/0.12) = 3.77
Conclusion
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