pH of 0.2 M acetate buffer (pKa = 4.77)

Calculate the pH of a 0.2 M acetate buffer (pKa = 4.77)

that contains twice as much acid as conjugate base.

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[conjugate base] = 1 이면,

[acid] = 2.

Henderson-Hasselbalch 식

pH = pKa + log([짝염기]/[약산])

( 참고 https://ywpop.tistory.com/1926 )

= 4.77 + log(1 / 2)

= 4.469

답: pH = 4.47

[키워드] 0.2 M acetate buffer 기준