$CH_3COOH\rightleftharpoons CH_3COO^-+H^+$BD $0,01M$ $0$ $0$
PL $0,01\alpha $ $0,01\alpha $ $0,01\alpha $
CB $0,01(1-\alpha )$ $0,01\alpha $ $0,01\alpha $
$\Rightarrow \frac{500}{1000}\times [0,01(1-\alpha )+0,01\alpha +0,01\alpha ]\times 6,023\times 10^{23}=3,13\times 10^{21}$
$\Rightarrow \alpha =0,0393\Rightarrow \alpha =3,93\%\Rightarrow Chon:A$