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Silkyruthie
25.07.2019 •
Chemistry
What is the ph of a buffer solution that is 0.45 m acetic acid (hc2h3o2) and 0.85 m sodium acetate (nac2h3o2)?
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Ответ:
pH = pKa + log [CH₃COO⁻] / [CH₃COOH]
As,
Ka of Acetic Acid = 1.8 × 10⁻⁵
pKa = -log Ka
pKa = -log 1.8 × 10⁻⁵
pKa = 4.74
So,
pH = 4.74 + log [0.85] / [0.45]
pH = 4.74 + log 1.88
pH = 4.74 + 0.276
pH = 5.01
Ответ:
false question and change it