If the degree of dissociation is $1.30\%$,what is the $K_a$ for $0.1 \ M \ CH_3COOH$?
- A$1.69 \times 10^{-5}$
- B$1.69 \times 10^{-4}$
- C$1.69 \times 10^{-6}$
- DNone of these
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