Question

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

Answer 1

B) pH = 3.67

Step-by-step explanation:

`pH = pK_(a) +log([A^(-)])/([HA]) \\`

`pH = 4.75+log([1.36*10^(-)2])/([1.64*10^(-1)]) = 3.67`