# How would you go about determining the concentration of an acetic acid solution in vinegar?

So take your vinegar which is approx. $1.0 \cdot m o l \cdot {L}^{-} 1$ with respect to acetic acid, and titrate $1.0 \cdot m L$ aliquots with say $0.1 \cdot m o l \cdot {L}^{-} 1$ volumes of standardized base, of $0.0500 \cdot m o l \cdot {L}^{-} 1$ to $0.100 \cdot m o l \cdot {L}^{-} 1$ concentrations. Use a suitable indicator, i.e. phenolphthalein, and you reach a stoichiometric end-point with $10 - 20 \cdot m L$ of titrant.
HOAc(aq) +NaOH(aq) rarr Na^(+)""^(-)OAc(aq) + H_2O(l)