Please read the entire description! 50gm ASA 33.5gm NaOH 150ml water Filter Add conc. HCl to taste (~150ml) Filter Wash, rinse & repeat. Dry 2 things 1.) You don't need to separate the ASA from tablets. 2.) Stir NaOH slowly! (a) CH3COO-C6H4-COOH + NaOH → CH3COO-C6H4-COONa + H2O (b) CH3COO-C6H4-COONa + NaOH → HO-C6H4-COONa + CH3COONa (c) HO-C6H4-COONa + NaOH → NaO-C6H4-COONa + H2O (d) NaO-C6H4-COONa + 2 HCl → HO-C6H4-COOH + 2 NaCl