# Ionisation constant of $CH_3COOH$ is $1.7 \times 10^{–5}$ and concentration of $H^+$ ions is $3.4 \times 10^{–4}$. Then find out initial concentration of $CH_3COOH$ molecules :-
( A ) $6.8 \times 10^{–3}$
( B ) $3.4 \times 10^{–4}$
( C ) $3.4 \times 10^{–3}$
( D ) $6.8 \times 10^{–4}$