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What would the initial pH of a acetate/acetic acid buffer system (pKa = 4.75) if the concentration of acetate is 1.36 × 10-2 molar and the concentration of acetic acid is 1.64 × 10-1?

A.
5.83
B.
3.67
C.
2.08
D.
1.66

Respuesta :

SvetkaChem

Answer:

B) pH = 3.67

Explanation:

[tex]pH = pK_{a} +log\frac{[A^{-}]}{[HA]} \\[/tex]

[tex]pH = 4.75+log\frac{[1.36*10^{-}2]}{[1.64*10^{-1}]} = 3.67[/tex]

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