0.05 M pyruvic acid + 0.06 M sodium pyruvate buffer pH
Find the pH of a buffer solution
with pyruvic acid and sodium pyruvate,
given the concentration of pyruvic acid was 0.05 M
and the concentration of sodium pyruvate was 0.06 M.
Find the pH of a buffer made by mixing
0.05 M pyruvic acid with 0.06 M sodium pyruvate.
Ka for pyruvic acid = 3.1×10^(-3).
단, pyruvic acid의 Ka = 3.1×10^(-3)
---------------------------------------------------
Henderson-Hasselbalch 식
pH = pKa + log([짝염기]/[약산])
( 참고 https://ywpop.tistory.com/1926 )
pH = pKa + log([짝염기]/[약산])
= –log(3.1×10^(-3)) + log(0.06 / 0.05)
= 2.5878
답: pH = 2.59
Q. Calculate the pH of a buffer which contains
0.0500 M pyruvic acid and 0.0450 M sodium pyruvate.
The Ka of pyruvic acid is 4.1×10^(-3).
A. pH = –log(4.1×10^(-3)) + log(0.0450 / 0.0500)
= 2.34
[키워드] pyruvic acid buffer 기준문서
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