Asked by Ele

I need to calculate the amount of grams of Na-benzoate in a Na-benzoate buffer (water based) with a pH = 4.2 at 25'C?
DrBob222
Use the Henderson-Hasselbalch equation.
pH = pKa + log [(base)/(acid)]
(base) = concn of the salt.
(acid) = concn benzoic acid.